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S7 200 As a Slave in MODBUS Communication

Created by: autobots at: 2/13/2012 6:34 AM (6 Replies)

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2/13/2012 6:34 AM	Rate (0)
autobots Posts: 10 Rating: (0)	Dear All, iam working with s7 200 communicating with Allenbradly PLC as a slave now the client is asking that they need Modbus Adress for my PLC. as they are communicating with my PLC thorugh Gateway and my plc has got DP Port they they have connected my PLC with thire plc. now as i have enabled the plc port 1 as modbus adress in the plc hardware config. now what else i can provide to them or what else i have to give them for communicating with my plc
autobots Posts: 10 Rating: (0)
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2/13/2012 6:57 AM	Rate (0)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 11/6/2024 Posts: 1523 Rating: (229)	autobots Dear All, iam working with s7 200 communicating with Allenbradly PLC as a slave now the client is asking that they need Modbus Adress for my PLC. as they are communicating with my PLC thorugh Gateway and my plc has got DP Port they they have connected my PLC with thire plc. now as i have enabled the plc port 1 as modbus adress in the plc hardware config. now what else i can provide to them or what else i have to give them for communicating with my plc Hello autobots, To start with you can go throught the excerpt from the S7-200 System Manual on Using the Modbus Protocol Library. After that you may get back for your further queries. Attachment Using the Modbus Protocol Library in S7-200.pdf (2026 Downloads)
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This contribution was helpful to 2 thankful Users Jth_v Gkp Raina

2/13/2012 7:50 AM	Rate (0)
autobots Posts: 10 Rating: (0)	hey ganes thanks for your support. but as i said to establish the communication between allenbradly master plc which is connecting to my PLC through Gate way and my plc S7 200 is with serial port...... they have converted the 485 to gateway but they are asking perticular adress of my plc to recognise on the Gate way....... now as from my side i have enabled the Modbus blocks and gave it a perticular port for communication ( PLC is S7 226 so port0 for PC to PLC communication and Port1 for Modbus communication) now from my part do i have to give them any oterh aspect for the communication. i hope iam clear enough to tell you my problem please help me out
autobots Posts: 10 Rating: (0)
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2/13/2012 8:36 AM	Rate (0)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 11/5/2024 Posts: 2957 Rating: (242)	Hi, You need to provide address, communication speed, start and stop bits. Nothing more. But what kind of gateway are you using ?
	Best regards, Darius
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2/13/2012 8:48 AM	Rate (1)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 11/6/2024 Posts: 1523 Rating: (229)	Hello autobots, Adding to your requirement of using S7-200 as a MODBUS Slave, you can check if your MODBUS slave programming is correct using modscan software. Through which you can ensure the communication is successful as well as you can guarantee the MODBUS parameters given to other end are valiated.
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3/13/2014 12:36 PM	Rate (0)
CS Moderator Moderator Joined: 9/1/2005 Last visit: 11/19/2024 Posts: 4114 Rating: (195)	follow up question published by girish bodhaleis split to a seperate thread with the subjectplease provide me modscan software. Best regards CS Moderator
	My Forum is the place to personalize your profile, track your topics, and maintain content that interests you. Best regards CS Moderator
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10/27/2015 10:39 AM	Rate (0)
Min_Moderator Platinum Member Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4766 Rating: (122)	New question published by Ashish Vasavir is split to a separate thread with the subject Need s7200 modbus slave library. Best regards Min_Moderator

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