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Check connection

1/26/2014 4:35 PM	Rate (0)
tn88test Posts: 17 Rating: (0)	I have a head plc control 5 sub plcs using PUT and GET instruction. The program will not work if the connection of the sub plc lost. So I want to display a status connection bit on HMI, but I don't know how to do it. Please help!
tn88test Posts: 17 Rating: (0)
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1/27/2014 8:16 AM	Rate (0)
Pittiplatsch Posts: 1368 Rating: (128)	Hello tn88test, what kind of head /sub plc do you use? Please give feedback, so we can try to help you... Greetings, Pittiplatsch
Pittiplatsch Posts: 1368 Rating: (128)
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1/27/2014 8:22 AM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	A very easy way is to use a watchdog - bit (1 Hz blink pulse). If watchdog stop blinking, communication is down.
IBN-Service Posts: 8946 Rating: (1000)
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1/27/2014 9:15 AM	Rate (0)
Pittiplatsch Posts: 1368 Rating: (128)	Hello again, the S7-1500 and S7-1200 supports an instructioncalled T_DIAGto check the status of a connection and read further information on the local end point of this connection. Perhaps, this also can be used for PUT/GET? Greetings...
Pittiplatsch Posts: 1368 Rating: (128)
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1/31/2014 8:04 PM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	Pittiplatsch Hello again, the S7-1500 and S7-1200 supports an instructioncalled T_DIAGto check the status of a connection and read further information on the local end point of this connection. Perhaps, this also can be used for PUT/GET? Greetings... No.
IBN-Service Posts: 8946 Rating: (1000)
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