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7SR11 Relay with CP341 modbus master

1/30/2011 6:54 AM	Rate (0)
AnsuAbinesh Experienced Member Joined: 12/14/2010 Last visit: 1/12/2025 Posts: 117 Rating: (0)	Dear Expert's, Can any one help me, im in trouble.Here i have used siemens CP341 modbus masterand Siemens7SR11 protection relay.This relayhaving modbus RTU cabability. Following settings are i did in relay side. Port com1: Modbus RTU Slave id: 5 Baud rate :9600 Parity : even The above mentioned same setting in CP341 also. But i cant gettingdatas from7sr11 relay.Anyfurther setting reqiured in relay side?.. If any one know pls Share....Me. Kindly give us solution Thanks in advance....
	Last edited by: Ganesan_K at: 1/30/2011 7:02 AM
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1/30/2011 5:08 PM	Rate (0)
Late Platinum Expert Joined: 1/7/2006 Last visit: 3/9/2025 Posts: 2705 Rating: (321)	Hi, You need some programming in the PLC where the CP 341 is installed. On the CP 341 you have to load a Modbus Master driver and you have to install the plug on the backside of the CP 341. See the handbook: SIMATIC S7-300/S7-400 Loadable Driver for Point-to-Point CPs: MODBUS protocol, RTU format, S7 is master And the Software: Loadable Driver "Modbus Master (RTU)"(You have to buy the Modbus RTU master package for the plug=licency) You need also to install the software for the PtP connections in the STEP7 manager: Download CD "CP340, CP341, CP440, CP441" Further you have to have a description of the Modbus slave which Registers and Coils the device have.
	I hope that the answer will help, if you have still questions, don't hesitate to ask me. All the best, Late Never say never, think in solutions, not in trouble......
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1/31/2011 4:40 AM	Rate (0)
AnsuAbinesh Experienced Member Joined: 12/14/2010 Last visit: 1/12/2025 Posts: 117 Rating: (0)	Dear Late, Thanks for reply. Already i did logic.Using that logic i have taken data from otherslave devices. Only problem that relay.They givenFunction code 4 for readinput register.starting register addr from 30001. But i cant able to find where problem found.

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