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Henri Schollier  
#1 Posted : Thursday, April 27, 2017 1:43:08 PM(UTC)
Henri Schollier

Before posting a question in the forum, please take a look if your question can be answered by any of the frequently asked questions:

Q: Can the TP10/RC be used with both E-bus and K-bus?


  • Due to the way K-bus works, the DIOC protocol will not function properly if any input/output on the K-bus is allotted to a faster cycle time then the dioc input/output.
  • If the amount of inputs/outputs of the K-bus is too large, the I/O cycle time will get offset by too much, causing the DIOC protocol to not function properly.

  • As such, K-bus is not officially supported for the TP10/RA/RC.

Q:Room controller does not start working, despite receiving messages from the PLC.


  • The input of the PLC is not connected to the output of the Room controller.  
  • The input/output of the PLC used for the Room controller do not match eachother.

Q:Room controller reacts to dipswitch actions, but messages do not make it to the PLC.


  • the voltage that the PLC provides dips below 22V. Upping the voltage supplied to 26V might solve the problem.

Q:Whilst starting up The PLC/Ethercat connection malfunctions.


  • More then 4 dioc devices are being started at the same time. The capacitors of the devices pull a current that is too high which causes the supply to fail. Starting the DIOC devices one by one should fix this problem. IF the problem persists, check if the power supply is big enough for all devices.

Q:Not all messages received by the Room controller are correct.


  • 'I/O at task begin' is not enabled in the system manager. This can be found under: PLC - configuration/*Project name* The 'I/O at task begin' box can be checked here.
  • linked program is not up to date. Right click the project name under PLC - configuration and click 'rescan project'. After re-enabling the configuration, the problem should be fixed.
    Rescan project
  • The cycle time of the PLC goes over the limit.
    Cycle time
  • The in or output of the TP10/VAV is being called in the wrong task.
    Change IO task

Q: Where does the roomcontroller get it's power?

A: The roomcontroller can be powered in 2 ways:

  • Possibility 1: (PREFEABLE)

    The pins 5 & 6 are provided for external power supply (24VAC or 24VDC) for the coupled actuators (VAV’s , valves,…).

    Change IO task

  • Possibility 2: (if only 3 wire available)

    You can also use the 24VDC from the DIOC communication protocol for the power supply.

    In this case there must be a bridge between pin 4 and 5 (24VDC) – and 2 to 6 (GND).

    Change IO task

If these Answers do not help you along, please make a post in the programming forum.

Edited by user Wednesday, September 20, 2017 9:26:10 AM(UTC)  | Reason: Not specified

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