6/19/2019 2:39 PM | |
Posts: 3093 Rating:
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Hello, Regards, |
6/19/2019 7:04 PM | |
Joined: 6/14/2013 Last visit: 3/18/2023 Posts: 218 Rating:
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hello, hope this help: |
6/19/2019 7:07 PM | |
Posts: 111 Rating:
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Why the 1st scan? Best to look at official Siemens examples. |
6/20/2019 7:57 AM | |
Posts: 111 Rating:
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Kaulquappe linked to an official article of value. The document discuss an essential technique that assists troubleshooting. Blocking out the enable of the instruction provides opportunity for trouble also. Blocking the enable is possible but is done with thought of edge trigger detection of instruction triggers. The linked example provide best guide.
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Last edited by: AutoGen_1801304 at: 06/20/2019 08:23:26 |
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This contribution was helpful to
1 thankful Users |
6/22/2019 2:20 PM | |
Joined: 3/3/2016 Last visit: 8/14/2024 Posts: 140 Rating:
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Hello Mirip! I checked the program as per your above instruction but busy output only coming value didn't came. Kindly check the Hardware setting for RS-485 communication. Find the enclosed the snap. AttachmentMB_master.zip (182 Downloads) |
6/22/2019 2:48 PM | |
Joined: 3/3/2016 Last visit: 8/14/2024 Posts: 140 Rating:
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How to check CM1241 RS422/485 module is ok or not. I have dout in this module. |
6/22/2019 7:10 PM | |
Joined: 6/14/2013 Last visit: 3/18/2023 Posts: 218 Rating:
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hello, |
6/24/2019 8:05 AM | |
Joined: 3/3/2016 Last visit: 8/14/2024 Posts: 140 Rating:
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Yes, I active the "Tag_7". |
6/24/2019 9:12 AM | |
Joined: 5/30/2013 Last visit: 8/22/2024 Posts: 50 Rating:
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I'm not sure if this has anything to do with your problem, but posting it either way. Take a look at the specification from modbus.org: Modbus_over_serial_line_V1_02.pdf From page 12:
What this tells us is that your device is having an "invalid" configuration. 1. Can it be changed to have a parity? or 2 stop bits? 2. If the answer to above is no, what happens if you in TIA sets two stop bits? Another typical issue is that you are asking for a nonexistent address. Are you sure that the address (including addreses specified by "Length") are ok? The offset is also often an issue; in other words if you are unsure whether it is offset "0" or "1", then it could be that your request of e.g. 30010 actually is a request of 30009 or the other way around. If then again this unintentional address "does not exist" you will receive an exception. I don't think this is the case here, as you are not getting any "STATUS", but mentioning anyway. |
Last edited by: JK_NO at: 06/24/2019 09:21:26 |
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