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i have try to communicated a S7400H PLC with a S7400 PLC

11/26/2012 10:24 AM	Rate (0)
jker Regular Member Joined: 5/17/2012 Last visit: 3/17/2025 Posts: 7 Rating: (0)	Dear Aret, i have try to communicated a S7400H PLC with a S7400 PLC. can i able to use Bsend and BRecv as a communication block? if can, did you have any sample of the Step7 ladder logic can be reference? coz what i facing is sometime the communication might lost, and i will get a error status of 3. thank you.
	Last edited by: O_Moderator at: 11/27/2012 10:59 AM new subject after splitting from /tf/WW/en/Posts/76116#top Last edited by: jker at: 11/26/2012 10:25 AM
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11/26/2012 11:44 AM	Rate (0)
Aret Posts: 2348 Rating: (265)	Basically you can... but in fact some additional code can be required to ensure fault-tolerant switch of connections.
Aret Posts: 2348 Rating: (265)
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11/27/2012 2:55 AM	Rate (0)
jker Regular Member Joined: 5/17/2012 Last visit: 3/17/2025 Posts: 7 Rating: (0)	Dear Aret, Thanks for you reply. may i know what is the additional code should i have ? coz what i facing is when i change over PLC, the communication will lost.
	Last edited by: jker at: 11/27/2012 2:56 AM
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11/30/2012 10:31 PM	Rate (0)
Aret Posts: 2348 Rating: (265)	Well, you have to look for PLC change yourself and take appropriate actions.
Aret Posts: 2348 Rating: (265)
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