Dear all,

I have 1 MM420 and 1 MM440 were linked in PROFIBUS network .When I sent 2 PZD word ( Control + Setpoint ) to each inverter , they received (Stop state).But When I sent control word to start motor (Ex:047F) , connection from PC to PLC was disconnected and MM440 had a fault message (F0070) and alarm message(A07030).

What is this error and how to solve this problem ?

Hello

F0070 CB setpoint fault STOP II
Cause
- no setpoints received via the communications bus during the telegram failure time.
Diagnosis & Remedy
- check the communications module (CB) and communications partner.

Use this example to solve your problem: Program examples for the Instruction Manual of the MICROMASTER PROFIBUS option module?

Hope this help...

reagrds

Hello

I guest that this motor works when you control "directly" without Profibus. You received error wich is consider with Profibus comunication. Now your received error: - no setpoints received via the communications bus during the telegram failure time. (this mean "no communication" with Profibus Master. ) Maybe your CB card doesn't work properly or somethink wrong in connection (connector) you have.

regards