9/25/2008 4:30 PM | |
Posts: 487 Rating: (45) |
Check this site http://www.modbustools.com/ There are master and slave simulator tools. Check if you see the problem even on a simulated slave. Also try to access your actual slave connected to simulator master. This way, you may be able isolate problem, if it is with master or slave. |
Last edited by: JMJ at: 9/25/2008 4:31 PM |
|
9/25/2008 10:39 PM | |
Posts: 2661 Rating: (279) |
Hi Nil96, We had a somewhat similar problem but we were using the PCS7 Modbus Addonpackage. When you use this package the main communication FB is the sequence coordinator (S7HMODM3) which in turn uses the P_SND_RK & P_RCV_RK. To solve the problem we moved the coordinator block to a faster OB, faster than the CP341 I/O scan. So in your case you should move the FB122/123 to a faster OB and see if it helps. Regards Attachmentmodseq.pdf (590 Downloads) |
9/26/2008 6:39 PM | |
Posts: 2661 Rating: (279) |
Hi Nil96,
This is a PCS7 addon product and needs to be ordered separately. Please contact the person reponsiblefor this product(from link in my last post) or check the following thread for the order numbers: Modbus Communication Package |
9/27/2008 10:57 AM | |
Joined: 4/5/2006 Last visit: 9/16/2024 Posts: 917 Rating: (63) |
Hi Nil96, you are going to confuse me: P_RCV_RK = FB122 & P_SND_RK = FB123 (i'm looking in PCS7 v6.1). What CFC Blocks are you using? Here a link for Modbus Manual with examples and errore codes http://support.automation.siemens.com/WW/view/en/1220184 |
Follow us on