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PROFIBUS connection between PLC S7 300 and OP37

7/28/2013 9:46 AM	Rate (0)
saharmalmir Posts: 22 Rating: (0)	Hi all Is it possible to establish PROFIBUS connection between PLC S7 300 and OP37? Thanks
saharmalmir Posts: 22 Rating: (0)
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7/28/2013 10:22 AM	Rate (0)
IBN-Service Posts: 8946 Rating: (1000)	If your OP37 has a MPI/DP interface you can connect it. But I counseling to go for a new panle because OP37 has finished for a couple of years already.
IBN-Service Posts: 8946 Rating: (1000)
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7/28/2013 10:38 AM	Rate (0)
saharmalmir Posts: 22 Rating: (0)	Thanks for reply yes It has MPI/DP interface but in STEP7 there is not OP37 for choose. how can I connect them?
saharmalmir Posts: 22 Rating: (0)
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7/28/2013 3:34 PM	Rate (0)
Ayman Elotaify Platinum Member Joined: 5/28/2008 Last visit: 3/24/2025 Posts: 4520 Rating: (843)	saharmalmir Thanks for reply yes It has MPI/DP interface but in STEP7 there is not OP37 for choose. how can I connect them? Hello, Use two bus connectors and profibus cable for connection between OP37 & S7-300CPU. Hope this helps.
	Ayman Elotaify
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7/28/2013 5:19 PM	Rate (1)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 3/23/2025 Posts: 12344 Rating: (2707)	saharmalmir Thanks for reply yes It has MPI/DP interface but in STEP7 there is not OP37 for choose. how can I connect them? Hello sahar; When you use Profibus-DP to exchange between a Siemens OP and a Siemens PLC, the OP is a master class 2 on Profibus-DP, not a Profibus-DP slave. That is why you cannot "select" an OP37 (or any other OP/TP/MP module) in the PLC's Profibus configuration. The communication must be setup on the OP37 software. I have found these documents for the OP37 and Protool,together they should guide you properly for this Profibus interface: ProTool Configuration Software OP27, OP37 Operator Panels Communication You need to find out how to set the dipswitches on port IF1B of the OPc7for Profibus-DP comms,you need to setup the Profibus parameters for the OP37's address see the attachment below), and you need to know how tosetup the data exchange areas between the PLC and the OP37. Read up and come back to the forum if you have specific questions. Hope this helps, Daniel Chartier Attachment OP37 Profibus parameters.jpg (115 Downloads)

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