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Modbuss communication with an Omron V1000 driver
Created by: naf-vsm at: 10/13/2010 11:43 AM (20 Replies)
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| 10/13/2010 11:43 AM | |
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Posts: 14 Rating:
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Hi all We have been trying to establish modbuss connection with an Omron v1000. Since i havent worked with modbuss communication before I downloaded some program from one of the siemens boards. this program should be able to make an modbus master to slave connection between two s7-1200 PLC's I used the master side of that program and changed the settings to the one that the Omron v1000 needs. and I set the V1000 for modbuss communication but i still do not get any respons from the V1000 when I send a command. Omron helped us with setting up the V1000 side. But the Siemens tech support center is'nt that of a help. So im trying to get some help here on the forum. Attached I got the program i tried. and the Omron V1000 manual. I tried sending several commands in several ways using Data_Block_1. trying; bytes words dwords and an array of bool's. According to the manual of the V1000 i need to send 2 bytes in hex (wich is 1 word?) Can any of you check my program and maybe tell me what im doing wrong? Thanks in advance ps. The Omron V1000 manual can be found here.. http://downloads.industrial.omron.eu/IAB/Products/Motion%20and%20Drives/Frequency%20Inverters/General%20Purpose/V1000/PC71060622/SIEC71060620-01-OY%2BV1000%2BUsersManual.pdf AttachmentModbus.zip (329 Downloads) |
Last edited by: naf-vsm at: 10/13/2010 12:01 PMLast edited by: naf-vsm at: 10/13/2010 11:58 AM |
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| 10/13/2010 3:53 PM | |
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Posts: 3093 Rating:
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Hello Naf, I haven't got STEP7 V10.5, so I can't open your project. Do you get the error bit at MB_MASTER? Which STATUS do you get? Regards, Kaulquappe |
| 10/13/2010 4:07 PM | |
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Posts: 14 Rating:
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I guess thats just an bool output? I conected an Q output on it.. and it flashes whenever i send a message over modbus. |
| 10/13/2010 4:11 PM | |
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Posts: 14 Rating:
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I uploaded a PDF file containing an overvieuw of the ladder program. for when u dont have the siemens software installed.
Attachmentmodbus program.pdf (407 Downloads) |
| 10/13/2010 4:17 PM | |
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Posts: 3093 Rating:
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Hello Naf, do you get Q0.3 with every activation of MB_MASTER? If yes, tell me the value of MB22 "LastError". Regards, Kaulquappe |
| 10/13/2010 4:32 PM | |
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Posts: 14 Rating:
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This is the page where i found the last error. its value was %MW22 and yes. i get the Q0.3 output at every activation |
Last edited by: naf-vsm at: 10/13/2010 4:33 PM |
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| 10/13/2010 4:55 PM | |
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Posts: 14 Rating:
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here i got the right one.. the value is 80C8 |
| 10/13/2010 5:09 PM | |
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Posts: 3093 Rating:
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Just have a look in the manual http://support.automation.siemens.com/WW/view/en/36932465 on page198 you can find the explanation: 80C8 The specified response timeout (refer to RCVTIME or MSGTIME) is 0. . |
| 10/13/2010 6:08 PM | |
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Posts: 14 Rating:
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Il try and fix this later today or otherwise tomorow. Thanks a lot for your help.. il post more when im getting along with my project. Thanks! |
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