4/28/2016 12:02 PM | |
Joined: 3/20/2012 Last visit: 8/13/2024 Posts: 118 Rating: (1) |
Hi, I've got a problem with a simple Modbus RTU (RS485) communication. The Comm_Load block returns no "done" and no "error" but a "status" 16#7000 (I've tried to set it to 0, but it comes backs to 16#7000). So the Modbus Master doesn't start, and i've never seen the leds Tx/Rx light. The hardware configuration is based on a CM Ptp / ET200SP ST Station on a Profinet IO, with a 1513 Cpu. All is ok, i've got no defaut, no diagnostic. I've also tried with a S71214 with a CM 1241 rs485. Got the same issue. The DB Modbus Data is not optimised. I've looked into all the examples found on this site, but never found any differences in code, parameters, data, or configuration... See the screenshots attached. Thanks for your help. Best regards. Olivier. AttachmentScreenShot.zip (996 Downloads) |
This contribution was helpful to1 thankful Users |
4/29/2016 10:41 AM | |
Joined: 3/20/2012 Last visit: 8/13/2024 Posts: 118 Rating: (1) |
My TIA Portal is V13 + sp1 +upd6. Best regards. |
5/1/2016 6:03 PM | |
Joined: 4/21/2006 Last visit: 9/17/2024 Posts: 510 Rating: (24) |
New question published by Roger Echave is split to a separate thread with the subject Modbus RTU: status = 7000. Best regards |
7/14/2016 10:41 AM | |
Joined: 9/3/2014 Last visit: 3/13/2019 Posts: 4767 Rating: (123) |
New question published by AutoGen_958102 is split to a separate thread with the subject S7-1515-2 PN with RS232 slave, COMM_LOAD will not output. Best regards |
3/1/2019 6:05 PM | |
Posts: 3093 Rating: (323)
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Hello uurr123, How do you evaluate the status of system blocks in STEP 7 (TIA Portal)? Regards, |
Last edited by: Kaulquappe at: 3/1/2019 6:05:48 PM |
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3/4/2019 4:49 PM | |
Posts: 20 Rating: (0) |
Hello kaulkuappe , I saved the error status by using the move and 16#80C8 showed up . Is there any specific wire connection method for modbus ? |
4/24/2019 11:37 AM | |
Posts: 20 Rating: (0) |
Hello everyone . I am still facing modbus rtu communication problem . I tried with the modscan and I can get the values from flowmeter . I put the pictures of the PLC programme and flowmeter register map Is there anyone can help me with this issue ? Attachmentmodbusproblem.pptx (417 Downloads) |
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