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S7 400 CPU communicating with a client S7 300 CPU via a CP342-5 card

Created by: epro at: 10/10/2009 3:05 PM (5 Replies)

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10/10/2009 3:05 PM	Rate (0)
epro Posts: 62 Rating: (0)	Dear all, The configuration is such that we have a S7 400 CPU communicating with a client S7 300 CPU via a CP342-5 card. Now as per attached doc. we found two different pictures of communication data length. Please explain. Attachment pic.zip (148 Downloads)
epro Posts: 62 Rating: (0)
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10/10/2009 8:02 PM	Rate (0)
jklm Platinum Member Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309)	Hello, In the first picture you use a generic GSD. In the second picture you use a HSP whichsupports enhanced S7 features. With an S7 CPU as master, the second choice is correct.
	Best regards jklm Suggestion was helpful? Feel free to rate it.
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10/11/2009 9:30 AM	Rate (0)
epro Posts: 62 Rating: (0)	Thanks for your reply. Can you please explain it in detail? What is generic GSD? If it depends upon the CPU type say 300 or 400 series? Waiting for your reply.
epro Posts: 62 Rating: (0)
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10/13/2009 2:40 PM	Rate (0)
Hulzhex Gold Member Joined: 8/25/2005 Last visit: 10/5/2024 Posts: 1162 Rating: (111)	Hello epro, if you are using a CP342-5 as DP-Slave with a Master within the same project it is allways the best way to configure it using the list of configured stations. Doing this STEP7 will correct Busparameters for both Stations for example. Within the first configuration you have selected an older CP342-5 via his GSD file. This older modul supports only 86 byte i/o data. The new one allways supports 240 byte i/o. Connecting a CP342-5 via his GSD file make sence, when the Station with the CP is not within your actual project. As edr told: use the second configuration! Hope this helps Sabine

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10/13/2009 4:45 PM	Rate (0)
J_Bell Posts: 5822 Rating: (412)	Dear epro, to tell you the truth... at least as far as I see it... you may have to check the order# of the CP you use. In DP_slave1 you use a 6GK7 342-5DA00-0XE0 In DP_slave2 you use a 6GK7 342-5DA02-0XE0 as you use different Hardware, you may have to expect also different functionality. Best regards J_Bell
J_Bell Posts: 5822 Rating: (412)
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10/18/2009 4:43 PM	Rate (0)
epro Posts: 62 Rating: (0)	Thanks to all of you. I got the solution from your valuable comments.
epro Posts: 62 Rating: (0)
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