testing a CP341 RS485

I'm trying to test my CP341 RS485 connection.

What Am I doing:

I send data every second as a test, the TXD led blinks.

I've connected a 15 pins connector on de CP...

pin 4 is connected to pin 8 of a 9pins subD
pin 11 is connected to pin 3 of a 9pins subD
pin 8 is connected to pin 5 of a 9pins subD

The subD is connected to a PC/PPI converter (6ES7 901...)

The RS232 side is connected to the PC

I get nothing in hyperterminal, and when I hit a key, the RXD led doesnt blink on the CP341

Any help on this topic ?

The Siemens PPI cable needs 24VDC to run...I would also set in Freeport mode.

Nick

24v

what pins need 24v ?

Hello Combo:






This from the S7-200_e.pdf manual.

Hope this helps,
Daniel Chartier

Hi

I connected the 24V and it works,

thanks

dchartier said:

Hello Combo:

This from the S7-200_e.pdf manual.

Hope this helps,
Daniel Chartier

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