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number of connections S7 1200 to PAC3200

Created by: luciferC4 at: 11/11/2010 10:28 AM (4 Replies)

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11/11/2010 10:28 AM	Rate (0)
luciferC4 Bronze Member Joined: 1/25/2006 Last visit: 2/26/2021 Posts: 254 Rating: (48)	Hi, can anyone tell me how many PAC3200 Sentrons are possible connect to S7 1200 PLC? is there limitation in number of connection. Communication is Modbus/TCP. Thanks.

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11/11/2010 12:45 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 1/7/2021 Posts: 10217 Rating: (1159)	Unique number of the connection (value range 1-255)  Each connection ID must only exist once. Up to eight parallel connection are possible at the same time. More details at Data Communication via Modbus/TCP with S7-1200 (CE-X22) BR, Hristo Mihalev

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11/11/2010 2:29 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/2/2021 Posts: 10196 Rating: (1696)	Perhaps I read wrong, but I thought the max tcp connections available on an S7-1200 is 4. If you are online with the PLC, that's 1. If you have an HMI, that's 2. That leaves you 2 for remote tcp connections. I would like it to be a higher number, so hope it's really 8.
	science guy
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11/15/2010 8:50 AM	Rate (0)
fritz Diamond Member Joined: 10/7/2005 Last visit: 3/3/2021 Posts: 2865 Rating: (968)	huggy_d1 Perhaps I read wrong, but I thought the max tcp connections available on an S7-1200 is 4. I would like it to be a higher number, so hope it's really 8. The 1200should indeed be able to communicate with up to 8 PAC3200's at the same time as per technical spec of the 1200 manual and THIS FAQ (Modbus on TCP will use the T-Blocks related TCP connection even though the Example does not seem to explicitly state this).
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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This contribution was helpful to 1 thankful Users 0_Einstein

11/15/2010 2:09 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 3/2/2021 Posts: 10196 Rating: (1696)	Thanks! I am very glad to know this.
	science guy
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This contribution was helpful to 1 thankful Users fritz

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