10/4/2019 10:55 AM | |
Joined: 8/27/2019 Last visit: 10/12/2019 Posts: 1 Rating:
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Hi sir using s7- 1200 i have to write values to external device register (40000---) in MODBUS TCP/IP communication. currently that devices as works as a Master .. i want to how to write external devices register 40000. ------------------------------------------------------------------------------------------ |
Last edited by: The Helping Hand at: 10/10/2019 12:52:16New subject after splitting |
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10/11/2019 4:17 PM | |
Joined: 9/16/2013 Last visit: 12/5/2019 Posts: 468 Rating:
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If device is a MASTER, it means you gonna be slave, device will ask you for your holding register (40000---). In that case you need to use MB_MASTER FB inside s71200. Take a look at picture. But it is more likely that you are Master and Device is a slave, since you need to write something on device registers, in that case u need to use MB_CLIENT. |
Last edited by: SOble at: 10/11/2019 16:18:06Imagination is more important than knowledge it embraces the entire world, and all there ever will be to know and understand |
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