S7200 Modbus Cable

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Modbus Cable Thread Starter: DesertDog Started: 04.08.2007 07:03 Replies: 3 « Previous thread Next thread » Enable Notification 04.08.2007, 07:03 DesertDog Joined 18.11.2006 Last visit: 09.08.2007 Posts: 6 Rating: (0)

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(0) Rate I am trying to setup a 224XP as a Modbus Slave using the Libraries. I want to test and have downloaded a PC application to test Modbus but I don't know the necessary cable pinouts. Can anyone please let me know the cables I need. Thanks

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04.08.2007, 08:34 Ashwin Joined 23.11.2006 Last visit: 08.08.2007 Posts: 12 Rating: (0) Private message

(0) Rate IN PORT 0 OR PORT 1, PIN 3 & 8 ARE SIGNAL A AND SIGNAL B OF MODBUS CABLE RESPECTIVELY.

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04.08.2007, 16:52 DesertDog Joined 18.11.2006 Last visit: 09.08.2007 Posts: 6 Rating: (0) Private message

(0) Rate Thanks but I'm not at all familiar Modbus setup. Is this a regular cable, or do I need a 485 converter or anything like that. What would the PC DB9 side be? I can't believe that I couldn't find any of this in 2 hours of searching last night.

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06.08.2007, 15:00 suri Joined 07.03.2007 Last visit: 15.08.2007 Posts: 13 Rating: (0)

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You should use the same PC/PPI (serial) you are using to program the PLC. There is no 'special cable' for Modbus, there is only a serial cable used to connect the two devices - PC and PLC, in this case with a RS232-RS485 converter (included in the PC/PPI cable).

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