Main FAQ Page -- SSi Website

 

I have an Internal Comms Error on my screen. What do I do?

 

This message is generated when the HMI does not have communications to the controller inside the panel. Possible reasons for this include:

 

• Loss of 24VDC power to terminals 1 (-) and 2 (+) on the controller.

 

• A bad communication cable between the HMI and the controller.

  (Check by ringing out the cable end to end, or checking for continuity.)

 

• Bad connection between the HMI and the controller.

  (Check both ends to make sure they are securely connected and not loose or damaged.)

 

• Cable connected to wrong port on back of HMI.

  (COM1=232 and COM3=485)