Navigationslinks überspringen.
h/p/cosmos coscom
h/p/cosmos coscom v1 / v2
h/p/cosmos coscom.dll for coscom v2
h/p/cosmos coscom v3
New features
h/p/cosmos coscom v4
h/p/cosmos .NET Objects for coscom v3
h/p/cosmos .NET Controls for coscom v3


interface communication protocol


[last update April 18, 2024]

The coscom® interface protocol has it's origin in the year 1992 and has been developed by h/p/cosmos® for safe, reliable and advanced communication, control and links between different h/p/cosmos ergometers like running machines, treadmills, bicycle ergometers, ladder ergometers etc., as well as control and monitoring equipment like PC, EMG, ECG, EKG, ergometry, ergospirometry, VO2max systems, metabolic carts, cardiopulmonary stress test systems, PFT, biomechanics and motion analysis systems, fitness and sports medical as well as lactate evaluation and analyzing software, etc. 



end-of-life / end-of-support
for coscom v3: 31.12.2023

coscom v3 and coscom v3.dll were developed in 2007 and have been installed as standard since 2008 for h/p/cosmos treadmills, ergometers and endless ladder discovery with MCU4 and MCU5 UserTerminals. With the new MCU6 UserTerminal, coscom v3 is no longer possible, only coscom v4. By the end of 2023, almost all h/p/cosmos treadmills in sizes 170/65 and 190/65 will still be available with both MCU5 and MCU6. But from January 2024, availability of the MCU5 treadmill can no longer be guaranteed, among other things due to the discontinuation (end-of-life) of some electronic components and chips on the MCU5. All MCU6 devices with TouchScreen but also LT-versions without UserTerminal only support coscom v4 with the validation by h/p/cosmos!

Other interface protocol emulations are not validated by h/p/cosmos.

Introduced in 2017, coscom v4 has been significantly improved and is the current and new internal h/p/cosmos standard for interface communication.

Therefore please upgrade your external host devices to coscom v4 in time to stay compatible.


coscom v4:




DLL download:

Test and Release document template: 20220214_hpcosmos_coscom_v4_QA_RA_release_document_sample.docx


Additional and latest safety notes and warnings see:


Pay special attention to the following Safety Warnings and Field Safety Notices FSN:





system wiring diagram  Field Safety Notice EKG CPET ergometry
Field Safety Notice


h/p/cosmos undertakes continuous effort in developing h/p/cosmos® coscom® further, so 2008 h/p/cosmos introduced the new
coscom v3 protocol which extends the functions of the existing coscom versions and defines a new communication model.


Important update from coscom v3 to coscom v4:

From January 2019 please use coscom v4 for control of h/p/cosmos and relevant OEM treadmills.

coscom v3 is still a very safe protocol and remains supported at this stage.

However, coscom v4 has additional safety features (initial re-confirming of treadmill start, compulsory failsafe instead of optional, etc.) and includes basically all essential commands required for treadmill control.

coscom v3 and coscom v4 are not fully compatible due to different structures.

coscom v3 still remains active for updating treadmill MCU5 firmware and also for implementation of functions such as keyboard and LED simulations, MCU5 optional functions, etc.


A description of coscom v4 please download here: 20231211_cos100115v4_hpcosmos_coscom_v4_interface_protocol_treadmills_ergometers_admin_OP.pdf


End of support for older coscom.dll (v1 and v2)

The support for all older coscom® files (including coscomekg.dll version 1.00 and coscom.dll version 1.2.9 and also including coscom v2) ended on 31.12.2010 as announced earlier in 2010.

Please upgrade in time to the new coscom v3 .NET Objects and coscom v3 .NET Controls or better to the latest coscom v4.

Please note also, that the older versions of coscom v1 and coscom v2 are not designed and not documented based on IEC 62304 (Medical device software - Software life cycle processes) and ISO 14971 (Medical devices - Application of risk management to medical devices).


Therefore from March 21, 2010 it is obligatory to upgrade to h/p/cosmos coscom v3 or coscom v4 in order to stay compatible with the latest norms, latest safety standards and Regulatory Affair Issues when connecting to h/p/cosmos medical treadmills.


coscom v1 and coscom v2 will be deleted automatically from the MicroControllerUnits MCU5 during the next Firmware Update of the treadmill.

MCU5 firmware v1.08.3 [cos16600m5tm-v1.08.3] is the last firmware including coscom v2.

MCU5 firmware v1.09.1 [cos16600m5tm-v1.09.1] release date approx. April 2021 will NOT include coscom v2 any more.

MCU6 never included coscom v1, v2 or v3.

MCU4 controllers (build from 1997 until 2007) cannot be updated but can be upgraded with MCU5 including coscom v3 and coscom v4.

For MCU1, MCU2 and MCU3 controller in UserTerminals (build from 1988 until 2001) no updates or upgrades are available.


Safety warning from February 8, 2019!

In the very old coscom v1 and coscom v2 interface protocols the command of a negative speed (e.g. -0.5 km/h) can lead to unwanted acceleration.

Do not send negative speed commands via RS232 interface when working with coscom v1 or coscom v2. Upgrade to coscom v3 or coscom v4 as soon as possible!




important announcement! (English)

h/p/cosmos only approves the interface protocol coscom® v3 and coscom® v4 for medical applications and herewith confirms the -since March 21, 2010 (MDD 93/42/EEC / Directive 2007/47/EC) mandatory- conformity of coscom v3 and coscom v4 according to the norms IEC 62304 (Life Cycle Requirements for Medical Device Software; Medical Device Software Life Cycle Processes) and ISO 14971 (Medical devices - Application of risk management to medical devices) as well as the compliance to a very high safety standard.

All other interface protocols (older versions coscom v2, coscom v1, coscomekg.dll, other treadmill emulations, etc.) are not validated by h/p/cosmos according to the norms IEC 62304 and ISO 14971 and must not be used for medical applications (e.g. ergometry, stress-tests, cardiorespiratory diagnostic, performance diagnostic, etc.) since March 21, 2010 in connection with h/p/cosmos treadmills or h/p/cosmos OEM treadmills!

We strongly recommend to update to the latest h/p/cosmos coscom v3 or even better coscom v4 interface protocol. In case you have any questions please contact service[@]


wichtige Ankündigung (Deutsch / German):

h/p/cosmos gibt nur das Schnittstellenprotokoll coscom® v3 und coscom® v4 für medizinische Anwendungen frei und bestätigt die -seit dem 21.03.2010 (MDD 93/42/EWG / EU-Änderungsrichtlinie 2007/47/EG) vorgeschriebene- Konformität von coscom v3 und coscom v4 nach den Normen IEC 62304 (Medizingeräte-Software; Software-Lebenszyklus-Prozesse) und ISO 14971 (Medizinprodukte - Anwendung des Risikomanagements auf Medizinprodukte) sowie die Einhaltung eines sehr hohen Sicherheitsstandards.

Alle anderen Schnittstellenprotokolle (ältere Versionen coscom v2, coscom v1, coscomekg.dll, andere Laufband Emulationen, etc.) sind von h/p/cosmos nicht nach den Normen IEC 62304 und ISO 14971 validiert und dürfen für medizinische Applikationen (z.B. Ergometrien, Stress-Tests, kardiorespiratorische Diagnostik, Leistungsdiagnostik, etc.) seit dem 21.03.2010 nicht mehr in Verbindung mit h/p/cosmos Laufbändern oder h/p/cosmos OEM Laufbändern verwendet werden!

Wir empfehlen dringend ein Update auf das neue h/p/cosmos coscom v3 oder besser noch auf coscom v4 Schnittstellenprotokoll vorzunehmen. Bei Fragen hierzu wenden Sie sich an service[@]



The following manufacturers have implemented the h/p/cosmos® coscom® protocol and/or the coscom.dll into their devices and / or software. Not all below listed manufacturers have implemented "coscom v3" or "coscom v4" yet, and so not all devices are compatible yet based on latest MDD requirements and DIN EN / IEC 62304. For a final re-confirmation concerning compatibility through coscom v3 or coscom v4 please contact service[@] and the respective manufacturer of the host device.


Ahlers Plus Plus











gaitway 3D 3-component force


biomechanics instrumentation



Metabolic cart / Ergospirometry



BSN lab

biomechanics, wearable technology



ECG / Metabolic cart / Ergospirometry

OEM treadmills






Centaure Metrix

Locometrix Gait- and

Balance Analysis System



Software, medical devices



Software, MotionAnalysis



Metabolic cart / Ergospirometry



Metabolic cart / Ergospirometry,

ECG, Running machines


custo med





EVE Training System


EDAN Instruments





emotion fitness

OEM treadmills















Fukuda Denshi Co., Ltd.

ECG & Medical Equipment




Metabolic cart / Ergospirometry


Geratherm Respiratory GmbH

Metabolic cart / Ergospirometry


h/p/cosmos sports & medical

running machines, treadmills,

ladder ergometer discovery,

torqualizer ergometers, software



Lokomat for robotic rehabilitation therapy


h/p/cosmos sports & medical


Running machines, Software, SmartCard Systems


h/p/cosmos sports & medical




Interactive Fitness Technologies

Interactive Fitness Technologies








Metabolic cart / Ergospirometry, ECG, Running machines



JINBO medical

Cardiac rehab software and OEM treadmills




Treadmills for horses




Gait analysis running machines


Labtech Ltd.


stress test systems





Locometrix Feedback

Produced and patented by Centaure Metrix®:




Fire brigade stress testing equipment, Ladder ergometer



Metabolic cart / Ergospirometry, ECG, via CardioControl External Device Control


medset medizintechnik





Metabolic cart / Ergospirometry, ECG


Software for Lactate Analysis and Performance Diagnostics



MESA Medizintechnik GmbH




Metabolic cart / Ergospirometry


Motek Medical

motion capture, animation and visualization systems








OEM treadmills


OXFORD Instruments

OXFORD Instruments




ECG stress test systems 




OEM treadmills


Pulse Biomedical

PBI Pulse Biomedical





Running machines



Running machines




Running machines




Motion Capture Systems




Running machines



Software, MotionAnalysis



Motion Capture Systems 


Vyaire (formerly VIASYS, CareFusion)

Metabolic cart / Ergospirometry, ECG,

OEM Running machines

VIASYS Healthcare
Welch Allyn






Metabolic cart / Ergospirometry



Motion Analysis Software

Gait Analysis & Biomechanic Force Plate Treadmills

Animation Software



Contact service[@] for further details about the device models and software versions.


The coscom from version 2.03.1 and higher is also designed for communication with and control of bicycle ergometers.


USB Converter

h/p/cosmos offers a converter from USB interface on computers to RS232 interface ports on host devices, like treadmills, etc. h/p/cosmos order number cos12769-01


Stay compatible

h/p/cosmos® undertakes utmost efforts in providing compatibility to the existing coscom protocol, even if there were updates for improvements and additions to the coscom protocol in future. h/p/cosmos always focuses on downward compatibility of the coscom protocol. In 2008 h/p/cosmos introduced a new coscom version called v3. This version introduced several new features and a new communication model which stays abreast of changes in modern software development. coscom v3 is actually not compatible with older versions but further versions will be downward compatible with this version.

In Autumn 2017 the new coscom v4 has been introduced and offers simplified solutions for remote control of treadmills and ergometers.


coscom.dll for fast implementation / integration

As a special support h/p/cosmos offers the h/p/cosmos coscom.dll file for fast and comfortable implementation of the h/p/cosmos coscom v1 and v2 protocol into devices and software. The support for this v1 and v2 dll will end on 31.12.2010. Please upgrade existing software to the new coscom v3 .NET Objects and Controls.


coscom v3 .NET Objects for fast implementation / integration

As a special support h/p/cosmos offers a set of Microsoft .NET libraries, the so called h/p/cosmos coscom v3 .NET Objects, for fast and comfortable implementation of the new h/p/cosmos coscom v3 protocol into devices and software.


coscom v3 .NET Controls for fast implementation / integration

For creating GUI graphical user interfaces, h/p/cosmos offers the so called h/p/cosmos coscom v3 .NET Controls. This set of Microsoft .NET Libraries is designed for fast and comfortable integration of some coscom v3 features into the graphical user interfaces of your software.


Participate in improving coscom protocol and coscom software

All of us (manufacturers, R & D software programmers, service engineers, etc.) have the potential of improving the coscom protocol when dealing with these issues during development and service issues. Any suggestions to improve the coscom protocol are welcome at any time and will be evaluated for update in the next version quickly for the benefit of all parties involved.


Test of interface communication. UserTerminal hardware simulator

After implementation of the h/p/cosmos coscom protocol into devices and software, extended tests of the communication must be performed with detailed documentation for safety reasons. Send your device and/or software to h/p/cosmos with a complete description of the test routine and h/p/cosmos will do its utmost to assist in testing the interface communication and cross-check with your test results.


As an alternative h/p/cosmos can offer a special hardware simulator (only the UserTerminal of a treadmill, a very handy device) at no charge for 4 weeks, in order to link the systems and to test the communication. Please make a documentation of the interface communication between your host device and the h/p/cosmos MCU simulator (for example use a data logger or data recorder) and send this protocol to h/p/cosmos for verification/validation and documentation process. This is obligatory also based on the latest norms (e.g. IEC EN 62304) and risk management.
Contact service[@] for further details.


Notes / Safety / Risk Management / Norms / Regulatory Affairs

Important implementation notes for programmers for safety relates issues can be downloaded and are stipulated in the file:



An overview about all relevant documents can be downloaded:

a) 20240418_cos100115v4_hpcosmos_coscom_v4_interface_protocol_treadmills_ergometers_admin_OP.pdf

b) 20220621_cos100115v4_hpcosmos_coscom_v4_ExtendedRemoteService.pdf 

c) 20220214_hpcosmos_coscom_v4_QA_RA_release_document_sample.docx

d) 20211201_regulatory_requirements_coscom_v4_interface_protocol_treadmill_control_hpcosmos.pdf


d) 20091022_cos100115_h-p-cosmos_coscom_v3_overview.pdf

e) 20120103_cos100115_h-p-cosmos_coscom_v3_treadmill_ecg_device_control_example.pdf



TMX 425, TMX428, TMX428CP, TMX58 or T2100 or other interface emulations:
Warning and Disclaimer!

This interface protocol is not validated by h/p/cosmos and not released for medical applications in compliance with standard EN 62304 and regulatory compliance.
The system producer / configurator (economic operator) is responsible and liable for sufficient testing, release, validation, regulatory compliance (also MDR (EU) 2017/745 and risk management) and documentation of these combined devices (h/p/cosmos treadmill and external control device, such as ECG, CPET, stress test device, etc.) in case of utilizing this protocol emulation.
h/p/cosmos rejects all claims and all liability for any issues related to the usage of the this interface protocol.
h/p/cosmos validates and recommends only the coscom v4 interface protocol. See
Latest warnings and FSN Field Safety Notices see website:



All h/p/cosmos coscom v3 documents including dll files, libraries, XDOP descriptions and tutorials can be downloaded in a ZIP file:


coscom v4 DLL download:


Possible risks, threats and scenarios if some safety features were not implemented:


Some applicable directives, regulations, norms, standards and legal / regulatory requirement when connecting medical devices (for example treadmills) to medical systems (for example ECG stress test system):


[1]      EN ISO 14971 risk management for medical devices

[2]      IEC 62304 Medical device software - Software life cycle processes

[3]      MDR Medical Device Regulation (EU) 2017/745
MDD Medical Device Directive 93/42/EEC
(for legacy devices)

[4]      MDD Medical Device Directive 2007/47/EC (for legacy devices)

[5]      Machinery Directive 2006/42/EC (previous version 98/37/EC)

[6]      ISO 20957-1 European Norm stationary training equipment. General safety requirements and test methods

[7]      EN 957-6 European Norm for treadmills

[8]      EN 60601-1 (3rd edition) Medical Electrical Equipment

[9]      EN 60601-1-4 Programmable Electrical Medical Systems

[10]   IEC 60601-1-6, IEC 62366-1 Usability for medical devices

[11]   DIN EN 61000-6-1, DIN EN 61000-6-3 and IEC 60601-1-2 for EMC Electromagnetic compatibility

[12]   CE-mark with 4-digit number
German Medical Device Law Implementation Act
(MPDG – Medizinprodukterecht-Durchführungsgesetz)
German Product Safety Act (Produktsicherheitsgesetz - ProdSG) > for sports devices
IEC 60335-1 > for sports devices


Medical running machines (treadmills) are active medical devices (therapeutic devices and rehabilitation devices) of the risk class IIb.

Always use IEC 60601-1 approved potential isolation components when linking medical devices via interface.


If the equipment is used in the field of medicine, all connected devices and host equipment must be linked with potential equalization cables. First connect the potential equalization cable with the corresponding potential equalization plug pin (next to the main switch at the front of the h/p/cosmos device), then connect the entire medical system to the main potential equalization terminal of the medical room and then connect the mains voltage power plug of the medical system.


Article 12 of MDD Directive 93/42/EEC:

Particular procedure for systems and procedure packs

1. By way of derogation from Article 11 this Article shall apply to systems and procedure packs.

2. Any natural or legal person who puts devices bearing the CE marking together within their intended purpose and within the limits of use specified by their manufacturers, in order to place them on the market as a system or procedure pack, shall draw up a declaration by which he states that:

(a) he has verified the mutual compatibility of the devices in accordance with the manufacturers' instructions and has carried out his operations in accordance with these instructions; and

(b) he has packaged the system or procedure pack and supplied relevant information to users incorporating relevant instructions from the manufacturers; and

(c) the whole activity is subjected to appropriate methods of internal control and inspection.

Where the conditions above are not met, as in cases where the system or procedure pack incorporate devices which do not bear a CE marking or where the chosen combination of devices is not compatible in view of their original intended use, the system or procedure pack shall be treated as a device in its own right and as such be subjected to the relevant procedure pursuant to Article 11.

3. Any natural or legal person who sterilized, for the purpose of placing on the market, systems or procedure packs referred to in paragraph 2 or other CE-marked medical devices designed by their manufacturers to be sterilized before use, shall, at his choice, follow one of the procedures referred to in Annex IV, V or VI. The application of the abovementioned Annexes and the intervention of the notified body are limited to the aspects of the procedure relating to the obtaining of sterility. The person shall draw up a declaration stating that sterilization has been carried out in accordance with the manufacturer's instructions.

4. The products referred to in paragraphs 2 and 3 themselves shall not bear an additional CE marking. They shall be accompanied by the information referred to in point 13 of Annex I which includes, where appropriate, the information supplied by the manufacturers of the devices which have been put together. The declaration referred to in paragraphs 2 and 3 above shall be kept at the disposal of competent authorities for a period of five years.



Systems and procedure packs
1. Natural or legal persons shall draw up a statement if they combine devices bearing a CE marking with the following other devices or products, in a manner that is compatible with the intended purpose of the devices or other products and within the limits of use specified by their manufacturers, in order to place them on the market as a system or procedure pack:
(a) other devices bearing the CE marking;
(b) in vitro diagnostic medical devices bearing the CE marking in conformity with Regulation (EU) 2017/746;
(c) other products which are in conformity with legislation that applies to those products only where they are used within a medical procedure or their presence in the system or procedure pack is otherwise justified.
2. In the statement made pursuant to paragraph 1, the natural or legal person concerned shall declare that:
(a) they verified the mutual compatibility of the devices and, if applicable other products, in accordance with the manufacturers' instructions and have carried out their activities in accordance with those instructions;
(b) they packaged the system or procedure pack and supplied relevant information to users incorporating the information to be supplied by the manufacturers of the devices or other products which have been put together;
(c) the activity of combining devices and, if applicable, other products as a system or procedure pack was subject to appropriate methods of internal monitoring, verification and validation.
3. Any natural or legal person who sterilises systems or procedure packs referred to in paragraph 1 for the purpose of placing them on the market shall, at their choice, apply one of the procedures set out in Annex IX or the procedure set out in Part A of Annex XI. The application of those procedures and the involvement of the notified body shall be limited to the aspects of the procedure relating to ensuring sterility until the sterile packaging is opened or damaged. The natural or legal person shall draw up a statement declaring that sterilisation has been carried out in accordance with the manufacturer's instructions.
4. Where the system or procedure pack incorporates devices which do not bear the CE marking or where the chosen combination of devices is not compatible in view of their original intended purpose, or where the sterilisation has not been carried out in accordance with the manufacturer's instructions, the system or procedure pack shall be treated as a device in its own right and shall be subject to the relevant conformity assessment procedure pursuant to Article 52. The natural or legal person shall assume the obligations incumbent on manufacturers.
5. The systems or procedure packs referred to in paragraph 1 of this Article shall not themselves bear an additional CE marking but they shall bear the name, registered trade name or registered trade mark of the person referred to in paragraphs 1 and 3 of this Article as well as the address at which that person can be contacted, so that the person's location can be established. Systems or procedure packs shall be accompanied by the information referred to in Section 23 of Annex I. The statement referred to in paragraph 2 of this Article shall be kept at the disposal of the competent authorities, after the system or procedure pack has been put together, for the period that is applicable under Article 10(8) to the devices that have been combined. Where those periods differ, the longest period shall apply.



Accessory equipment connected to the analog and digital interfaces must be certified according to the respective IEC standards, e.g. IEC 950 for data processing equipment and IEC 60601-1 for medical equipment. Furthermore all configurations shall comply with the valid version of the system standard IEC 60601-1-1. Everybody who connects additional equipment to the signal input port or signal output port or via any other linkage possibility, configures a medical system, and is therefore responsible that the system complies with the requirements of the valid version of the system standard IEC 60601-1-1. (MDD: 13.6.c, IEC 60601-1).


When connecting medical devices to a medical system and/or when putting a company sign/logo/mark on a medical device, you become the manufacturer of this new device/system and you are responsible for CE-marking, technical documentation, risk management and all obligations based on MDD and the respective local laws and norms.



E & OE. Subject to alterations without prior notice.
h/p/cosmos is not liable for any damage and/or injuries arising from incompatibility or malfunction of host devices and/or software during controlling and communication between any of the systems, especially if no valid and implemented and signed quality assurance and regulatory affairs agreement exists.


Copyright 1992 - 2024 h/p/cosmos sports & medical gmbh / Germany.

All rights reserved.


Copyright, Disclaimer and Legal Notice.

The implementation and use of the coscom protocol in other devices (not manufactured by h/p/cosmos) and in other software (not manufactured by h/p/cosmos) is only permitted, if h/p/cosmos sports & medical gmbh has agreed to the implementation and usage of coscom prior in writing and if the quality assurance and regulatory affairs agreement including release document has been signed between the h/p/cosmos sports & medical gmbh and the other party and if this quality assurance and regulatory affairs agreement is fully implemented.


coscom v3 and coscom v4 have been developed for the control of h/p/cosmos treadmills and other h/p/cosmos ergometers and other h/p/cosmos products and shall support manufacturers of ECG, ergospirometry and software manufacturer to utilize a safe and sophisticated interface protocol, which is maintained and updated according to latest regulatory affairs standards.


As a contribution to h/p/cosmos' efforts for development and updating the coscom protocol and the coscom.dll, all users of the coscom protocol and coscom features who received the permission of use in writing, are obliged to list the name and company logo h/p/cosmos and the Copyright of h/p/cosmos in their software menu and their user/operation manual on a well visible position.



Software menu


The best way for a menu to select the right running machine type in your software


In order to make your work easier and to help all service & sales engineers during installations please allow to make some suggestions according to our experiences and for future improvements. There are always discussions and queries how to find and select the right ergometer model. Following should be a simple and effective solution and a great menu on the ECG, Ergospirometry or PC for selecting the right ergometer type.


All of the below listed treadmill / ergometer types are made by h/p/cosmos and are equipped with the same RS232 interface protocol: h/p/cosmos coscom v3 or coscom v4.

  • h/p/cosmos coscom v3
  • h/p/cosmos coscom v4
  • torqualizer coscom v4
  • JAEGER coscom v3
  • VIASYS coscom v3
  • Vyaire coscom v3
  • Vyaire coscom v4
  • CareFusion coscom v3
  • CORTEX coscom v4
  • COSMED coscom v3
  • COSMED coscom v4
  • proxomed coscom v3
  • proxomed coscom v3
  • KISTLER coscom v3
  • MAW coscom v3
  • MAW coscom v4
  • SCHILLER coscom v3
  • SCHILLER coscom v3
  • zebris coscom v3
  • zebris coscom v4
  • HUR coscom v3
  • ProMedPlus coscom v3
  • PHYSIOMED coscom v3
  • NORAXON coscom v3
  • NORAXON coscom v4
  • emotion fitness coscom v3
  • emotion fitness coscom v4
  • Arsalis coscom v3
  • Arsalis coscom v4
  • CORTEX coscom v3
  • CORTEX coscom v4
  • Custo coscom v3
  • Custo coscom v4
  • ergoline coscom v3
  • ergoline coscom v4
  • JINBO medical coscom v3
  • JINBO medical coscom v4

Please do not list the different models (h/p/cosmos mercury med, h/p/cosmos pulsar,  JAEGER LE 200CE, etc.) as all models have the same protocol. Furthermore we recommend to use treadmill symbols. h/p/cosmos provides true type fonts with legends and image files for the different models.


Don't forget these special features

Please also pay attention to some very important and interesting features of the h/p/cosmos coscom protocol:


  1. Activation of the automatic stop (fail safe) of the treadmill ("time-out") after a cut of the RS232 communication (defective interface cable, etc.)
  2. Error simulation on failsafe function (timeout simulation of broken RS232 interface cable or PC failure or software crash) and with status communication of stop button pressed on the treadmill have to be made. If stop button was pressed on the treadmill, also the load protocol on the host PC-Software or system has to stop and must not continue to send speed or elevation commands automatically.
  3. Checksum and Acknowledgement have to be implemented in the interface protocol accordingly.
  4. Implementation of the SunTech Tango Blood Pressure Monitor in the h/p/cosmos coscom protocol. It would be great if your system offers to read the Blood Pressure Date via the h/p/cosmos coscom protocol and also offers to control the SunTech Tango system via the h/p/cosmos coscom protocol.
  5. Implementation of the "Acceleration and Deceleration levels" in the ECG or Ergospirometry or PC Software menu. This is a frequently asked question of the customers. Some of them are not happy if the treadmill speeds up slow, some of them are not happy if it speeds up very fast.
    All h/p/cosmos running machines offer an optional function where you can select a permanent acceleration level for all incoming speed commands via series interface RS232 h/p/cosmos coscom protocol. But it would be better and much more comfortable to have a menu in your system.


Seven different acceleration levels and deceleration levels are available for all modes and for remote control via RS232. Max. Acceleration Level and minimum Acceleration Level see chapter: User Options / Optional Functions in the treadmill manual.

If the existing acceleration levels don't meet your needs, coscom also offers the possibility to set the exact acceleration value in m/s.


All 5 features A, B, C, D and E would be a great advantage compared to competitors too. Please also allow to introduce the PC software h/p/cosmos para control. It looks like the original keyboard and display of the h/p/cosmos and OEM versions. With this program you can remote control all Treadmill functions from the PC. We recommend to install h/p/cosmos para control to the PC for having following benefits:


  1. If the customer has a treadmill without UserTerminal Hardware: He can easily control the treadmill without starting the ECG or Ergospirometry Software by means of h/p/cosmos para control.
  2. If there are problems with the remote control of the treadmill it is easy to check if the problem is in the ECG / Ergospirometry or in the treadmill.
  3. If the customer has a treadmill without UserTerminal Hardware: For Service and maintenance it is essential to have the h/p/cosmos para control, because otherwise it is not possible to use the optional functions of the treadmill. The ECG / Ergospirometry menu does not offer access to the optional functions of the treadmill.


And last but not least, it would be great if in the ECG / Ergospirometry installation menu is included a Word or html file with a good instruction list (the right order, screen-shots, etc.) how to link the treadmill and how to select the right treadmill type on the ECG / Ergospirometry.


Simulator for implementation and testing

A hardware simulator is available for perfect testing of the RS232 interface communication. And you can always send us your software for testing the communication. Ask for more details.



Interface connecting cable


Interface cable for connecting ergometers and software: cos00097010034


(e.g. with software h/p/cosmos para graphics or h/p/cosmos para control)

To be used for example with h/p/cosmos para graphics, h/p/cosmos para control, PC ECGs, Ergospirometry Devices. For connecting your PC to the Running-Machine you need an interface cable (optional equipment) 9-pole Sub- D (male - female) with crossed transmission-receive-cable (PIN 2 and PIN 3).

For control via USB interface an optional converter (USB-RS 232) is available at h/p/cosmos.

For control via USB interface the processor on the PC must be Pentium 1.8 GHz or higher.


order numbers
RS232 connecting cable 5 m
RS232 connecting cable 10 m
RS232 connecting cable 15 m
USB-RS 232 interface converter / adapter



Safety features


Make it safe

Please pay attention to following important functions, in case you are controlling the treadmill:


Check the treadmill status

In your software controlling the treadmill you have to terminate any automatic load profile and set speed and elevation values to 0 (zero) after


  1. pressing "STOP" on the treadmill keyboard
  2. termination of the interface communication (maybe cable has been disconnected by accident)
  3. the treadmill has been stopped via emergency button, which will fully power off the treadmill (no interface communication)


The reason for that is: Many users control the treadmill via the RS232 interface (ECG, ergospirometry, PC-software, etc.) and an automatic load profile (for example BRUCE protocol). Then the user press the normal STOP button on the treadmill keyboard, since he had a treadmill with display and user terminal (cockpit). The treadmill stops and the customer thought he was safe. But then suddenly the treadmill speeds up again, because it received the next load signal (speed and elevation value) from the ergospirometry or ECG.


It is of great importance to communicate via interface the "STOP-status" of the h/p/cosmos coscom protocol, in case the system was stopped on the treadmill keyboard and not on the stress test device (ergospirometry or ECG).


The same risk can occur if the treadmill was stopped in any other way (treadmill power off, etc.) and the control device (ergospirometry or ECG) did not get or did not consider this information and continues to send speed or elevation commands via interface to the treadmill.


Use the failsafe timeout

Please consider the safety timeout (Failsafe) of the communication protocol. In case the interface connection will be terminated (e.g. the cable is cut or somebody pulls the RS232 interface plug or in case the PC OS has a malfunction), then the treadmill needs to stop automatically.


Control the acceleration level

You can use the acceleration level (acceleration index or exact acceleration value) for variations of speeding up or slowing down.
A very useful an highly appreciated feature.


Test your software

To be in compliance with the latest safety standard, please send us your control software together with a complete description of test routine. This will allow h/p/cosmos to verify functions and safety. Also we can offer a special hardware treadmill simulator for testing the RS232 hardware connection. Ask for further details.


Compatible h/p/cosmos® software

coscom interface protocol serves perfectly for communication with h/p/cosmos software:

para control®

para graphics®

para analysis®

para motion®


(c) Copyright 1992 - 2022 Franz Harrer & h/p/cosmos sports & medical gmbh.

All rights reserved. E & OE.

coscom® and h/p/cosmos coscom® and h/p/cosmos® are registered trademarks of Franz Harrer and/or h/p/cosmos sports & medical gmbh.




The website for the high profile coscom modular MES Solutions for the Manufacturing Industry: CAD CAM, MDC, EDC, Control Center, Cell/Tool Management, DNC, PDM from COSCOM Computer GmbH can be found here: