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diagnostic DO16xDC24V/0.5A 6ES7 322-8BH01-0AB0

4/15/2008 9:19 AM	Rate (0)
Deymus Posts: 12 Rating: (0)	Hi, i am usingdiagnostic DO16xDC24V/0.5A 6ES7 322-8BH01-0AB0. Currently, I am able to detect only 14 channelfaults. When there is a 15th channel fault, my first channel fault will be gone. Is there any ways to detect all my 16 channel faults?
Deymus Posts: 12 Rating: (0)
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4/15/2008 8:04 PM	Rate (0)
Phantom75 Posts: 2661 Rating: (279)	This is not normal. Did you check the Group Diagnostics for all 16 channels? See attachment. Link for the manual download: Signal Modules for Process Automation: http://support.automation.siemens.com/WW/view/en/7215812 Attachment Dokument1.pdf (313 Downloads)
Phantom75 Posts: 2661 Rating: (279)
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4/16/2008 4:10 AM	Rate (0)
Deymus Posts: 12 Rating: (0)	ya i have already checked the diagnostic interrupt and etc. I am trying to detect the wire break of each channel. When there is a error for channel 0, it will display the error msgat byte 17 to 19. As for channel 2, it will be from byte 20 to 23. WhenI reached my 15th error, they will randomly replace one of my channel error msg. Example when the 15th error come out, byte 17 to 19 will replace with the latest channel error and the overflow bit byte 2 bit 7 will be activated.
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4/16/2008 2:21 PM	Rate (0)
Aret Posts: 2348 Rating: (264)	Can you say what do you use for diagnostics?
Aret Posts: 2348 Rating: (264)
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4/17/2008 3:27 AM	Rate (0)
Deymus Posts: 12 Rating: (0)	Im using it for wire break detection. it is connected to a relay for each channel.
Deymus Posts: 12 Rating: (0)
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4/17/2008 4:54 AM	Rate (0)
Phantom75 Posts: 2661 Rating: (279)	Deymus: Which software block are you using for reading the module diagnostics? Regards
Phantom75 Posts: 2661 Rating: (279)
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4/17/2008 5:23 AM	Rate (0)
Deymus Posts: 12 Rating: (0)	Hi, I'm using SFC 13 "DPNRM_DG" (Slave Diagnostics)
Deymus Posts: 12 Rating: (0)
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4/17/2008 11:50 PM	Rate (0)
Phantom75 Posts: 2661 Rating: (279)	Deymus: An overflow is occurring due to 244 bytes being sent by the slave when the 8th channel is also going faulty. See attachment. You need to do some data handling (using additional SFC's) to capture all the faults properly. This can be tricky and involve some work. A better way is to use FB125. See the link below: PROFIBUS Diagnostics Package for SIMATIC S7 and TD/OP: http://support.automation.siemens.com/WW/view/en/5362473 Regards, Phantom Attachment OverFlow.pdf (294 Downloads)
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