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80B7 Error Code on TCP Modbus Server

9/23/2018 10:03 PM	Rate (0)
DougBlack1 Member Joined: 3/24/2017 Last visit: 2/26/2021 Posts: 6 Rating: (0)	Hello, I'm getting a 80B7 code for a Modbus Server I am trying to setup. My PLC is a S7-1516-3 and I am using the X2 P1 port. I am trying to read the PLC via a laptop running a Wonderware Ethernet IO Server. The laptop's IP address is 192.168.2.50 Attachment modbus.jpg (590 Downloads)

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9/23/2018 10:10 PM	Rate (1)
#dP Posts: 2826 Rating: (690)	DougBlack1 Hello, I'm getting a 80B7 code for a Modbus Server I am trying to setup. My PLC is a S7-1516-3 and I am using the X2 P1 port. I am trying to read the PLC via a laptop running a Wonderware Ethernet IO Server. The laptop's IP address is 192.168.2.50 Any reason for the local port to be 0?
#dP Posts: 2826 Rating: (690)
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This contribution was helpful to 2 thankful Users DougBlack1 zdfhsadgzx

9/23/2018 10:19 PM	Rate (0)
DougBlack1 Member Joined: 3/24/2017 Last visit: 2/26/2021 Posts: 6 Rating: (0)	#dP I've tried swapping 502 and 0 in and out of both the Local and Remote with no luck. Is there a port number I should be assigning to these ports? I just got 502 from some other tech notes I've seen. DougBlack1 Hello, I'm getting a 80B7 code for a Modbus Server I am trying to setup. My PLC is a S7-1516-3 and I am using the X2 P1 port. I am trying to read the PLC via a laptop running a Wonderware Ethernet IO Server. The laptop's IP address is 192.168.2.50 Any reason for the local port to be 0?

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9/23/2018 10:31 PM	Rate (0)
#dP Posts: 2826 Rating: (690)	Hello. DougBlack1 I've tried swapping 502 and 0 in and out of both the Local and Remote with no luck. Is there a port number I should be assigning to these ports? I just got 502 from some other tech notes I've seen. A port number of 502 is kinda` the standard expected value. This is stated in the documentation; also stated is other possible values. But it takes two to tango. If the partner blocks that port number, you will not have any luck. ~
#dP Posts: 2826 Rating: (690)
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This contribution was helpful to 1 thankful Users DougBlack1

9/23/2018 10:41 PM	Rate (0)
DougBlack1 Member Joined: 3/24/2017 Last visit: 2/26/2021 Posts: 6 Rating: (0)	I've changed the local to 502 and now I'm getting a 7002 code. I'm not reading any data at the laptop.

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9/23/2018 11:52 PM	Rate (0)
DougBlack1 Member Joined: 3/24/2017 Last visit: 2/26/2021 Posts: 6 Rating: (0)	So, many hours later, I power cycle the PLC and now the Modbus is working.

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