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cpu 414pn/dp read data from cp340-1?

Created by: autom at: 10/29/2008 11:06 AM (10 Replies)

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10/29/2008 11:06 AM	Rate (0)
autom Posts: 89 Rating: (1)	Hello to everyone. I Have a cpu 414 pn/dp connected with ET200M (6ES71531AA030XB0). On ET200M i put a CP340-1 (point to point communication) and i want to get data from modbus devices via cpu 414 pn/dp. Is that possible? and if is possible can someone help me? the Hardware congiguration showed at attachment. Thangs in advance. Attachment modbus.JPG (90 Downloads)
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10/29/2008 4:04 PM

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In case of CP340 you will need to write your own Modbus protocol program in user program. But if you use CP341, you buy loadable drivermodbus master.

6ES7870-1AA01-0YA0	SIMATIC S7, MODBUS MASTER V3.1 SINGLE LICENSE F.1 INSTALLATION R-SW, SW AND DOCU. ON CD, HW-DONGLE, CLASS A, 3 LANGUAGES (G,E,F), EXECUTABLE U. STEP7 FROM V4.2, REFERENCE-HW: CP341 AND CP441-2
6ES7870-1AA01-0YA1	SIMATIC S7, MODBUS MASTER V3.1 SINGLE LICENSE F.1 INSTALLATION R-SW, WITHOUT SW AND DOCU., HW-DONGLE, CLASS A, 3 LANGUAGES (G,E,F), EXECUTABLE U. STEP7 FROM V4.2, REFERENCE-HW: CP341 AND CP441-2

You can choose either of the one above. Oneis withsoftware on CD and one is without it. But software is available for download for free. But to use it you will still need one of the parts above orderd because that is the way to get the dongle to put behind CP341 which will enable the software.

10/29/2008 6:18 PM	Rate (0)
autom Posts: 89 Rating: (1)	Thang JMJ for Reply and for your help. But my question still remains. can i read data from cp340-1 via cpu 414 pn/dp?? The cp340-1 is on et200m (6ES71531AA030XB0) and the communication between et200m and cpu 414 pn/dp is with profibus.
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10/29/2008 10:08 PM	Rate (0)
JMJ Posts: 487 Rating: (45)	Yes, you can use CP340 and CP 341 on an ET200M rack with an S7-400 CPU via profibus as long as the integrated DPinterface of the CPU is used for connecting to the ET200M station. Check the FAQ below. http://support.automation.siemens.com/WW/view/en/24708615 But as I mentioned above, CP340 is just a serialcommunication interface that supports ASCII, Serial Printer and 3964R protocols, it does not support modbus. You should use CP341 with loadable modbus driver for this.
JMJ Posts: 487 Rating: (45)	Last edited by: JMJ at: 10/30/2008 2:49 PM
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10/30/2008 1:59 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Dear autom, do you mean the serial CP or the Ethernet CP? The serial CP is either the CP 340 or the CP 341, the Ethernet CP is the CP 343-1. By the way, the Ethernet CP would not work in this case in the ET200 M. This confuses me a bit. Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
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10/30/2008 3:36 PM	Rate (0)
autom Posts: 89 Rating: (1)	Thang you guys for your Help. Also J_Bell i meanthe serial CP, the CP340. Isthere anyproblem with this Card? There is any example to configure cp340-1 to communicate with modbus devices? The CP i want to use has serial number 6ES7 340-1CH02-0AE0 and is Communication processor with connection: RS422/485 (ASCII, 3964R, printer); V1.0 Thangs.
autom Posts: 89 Rating: (1)	Last edited by: autom at: 10/30/2008 3:58 PM Last edited by: autom at: 10/30/2008 3:41 PM
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10/30/2008 5:34 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Dear autom, I hope you are aware of the fact that the CP 340 may not be used with the MODBUS RTU Master / Slave driver at all. For one of these two drivers you require the CP 341, there is no way around that. The documentation of the MODBUS driver contains a sample to configure this CP. Loadable driver "Modbus Master (RTU)" Loadable driver Modbus Slave (RTU) Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)	Last edited by: J_Bell at: 10/31/2008 10:55 AM
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10/31/2008 7:46 AM	Rate (0)
autom Posts: 89 Rating: (1)	Is that for sure J_Bell because one colleaguetold me thati can read data from modbus devices with cp340. Anyway thang you very much.
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10/31/2008 10:57 AM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Hello, did you check the downloads I posted? There it is mentioned which CP’s are supported. If you check the Catalogue you will see that the CP 340 does not support MODBUS at all. But if you want to implement the MODBUS Stack to the CP ... I would appreciate to know more about it. Best regards J_Bell
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10/31/2008 12:31 PM	Rate (0)
autom Posts: 89 Rating: (1)	I Let you Know in a 3 or 4months, becausethe project is at 2009. Bye guys and thangsfor yoursupport.
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Created by: autom at: 10/29/2008 11:06 AM (10 Replies)

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Last edited by: autom at: 10/30/2008 3:58 PM

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