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Analog Monitring Problem in Safety PLC

Created by: Atul Gupta at: 7/27/2017 11:37 AM (5 Replies)

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7/27/2017 11:37 AM	Rate (0)
Atul Gupta Bronze Member Joined: 9/11/2012 Last visit: 3/27/2025 Posts: 70 Rating: (5)	Hello, I am facing on of problem related with analog input monitoring. CUP is 317F and AI module no.is 6ES7 336-4GE00-0AB0. (Fail Safe system) I have attached snap shots in which I can monitor alalog value in hardware but I cannot see the value in IW320. Please see the attached pic and tell me why it is happing? Please help me out. Attachment IW320.jpg (846 Downloads)
	Last edited by: Atul Gupta at: 7/27/2017 1:00:07 PM Last edited by: Atul Gupta at: 7/27/2017 1:01:31 PM If this post helped you, you may use the Rate-button Thanks & Regards: Atul Gupta
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7/30/2017 6:10 PM	Rate (0)
Sandeep Bakoliya Bronze Member Joined: 7/20/2015 Last visit: 3/24/2025 Posts: 154 Rating: (27)	Atul Gupta Hello, I am facing on of problem related with analog input monitoring. CUP is 317F and AI module no.is 6ES7 336-4GE00-0AB0. (Fail Safe system) I have attached snap shots in which I can monitor alalog value in hardware but I cannot see the value in IW320. Please see the attached pic and tell me why it is happing? Please help me out. Hi Atul Use charts and call AI channel drivers in charts Attachment F-AI.docx (775 Downloads)
	Regards Sandeep Bakoliya
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8/1/2017 7:17 AM	Rate (1)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 8/31/2025 Posts: 6874 Rating: (1368)	Dear user, I am facing on of problem related with analog input monitoring. CUP is 317F and AI module no.is 6ES7 336-4GE00-0AB0. (Fail Safe system) I have attached snap shots in which I can monitor alalog value in hardware but I cannot see the value in IW320. Please see the attached pic and tell me why it is happing? Please help me out. Clearly, you are using S7-Distributed safety and developing your logic with F-LAD.The problem is explained in the manual related to safety signal module(Attached file). In case of a wire breakage in S7-Distributed Safety, fail-safe value of 0 is written to process input image (PII). For each analog input module there is an automatically generated data block that contains some inputs to acknowledge any error or trigger re-integration and some outputs that indicate faults on any channel plus a DIAG for troubleshooting.I think your case can be solve by checking that DB plus proper wiring of module. SIMATIC Automation System S7-300 ET 200M Distributed I/O Device Fail-safe signal modules I hope it helps, hdhosseini Attachment F_SIM.jpg (660 Downloads)
	Last edited by: hdhosseini at: 8/1/2017 9:46:32 AM Demo Channel on Youtube
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This contribution was helpful to 2 thankful Users Atul Gupta AmolGaikwad1200

9/16/2017 7:37 PM	Rate (1)
Abhishek Joshi Advanced Member Joined: 10/10/2015 Last visit: 7/13/2025 Posts: 2 Rating: (1)	Hi Atul Just move your IW address to MW address then used the same MW address as input of F_SCA_I block and you will found your count value
	Last edited by: Abhishek Joshi at: 9/16/2017 7:42:24 PM Last edited by: Abhishek Joshi at: 9/16/2017 7:43:37 PM
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10/5/2017 9:05 AM	Rate (0)
Elonen Bronze Member Joined: 4/11/2012 Last visit: 10/29/2024 Posts: 181 Rating: (34)	Abhishek Joshi Hi Atul Just move your IW address to MW address then used the same MW address as input of F_SCA_I block and you will found your count value This can't be made, as the IW is failsfe input but the MW is not failsafe so the whole safety system would be irrelevant. Like hdhosseini mentioned in earlier message, the problem is that the input module safety program is not happy. Quite alot depends on how the analog safety input module reintegration is made. Best guess is that it's not made, or it has conditions that are not met or there is an actual fault in the IO device.

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This contribution was helpful to 1 thankful Users hdhosseini

1/7/2022 1:09 AM	Rate (0)
JIHOON APPA Member Joined: 3/9/2012 Last visit: 2/21/2024 Posts: 1 Rating: (0)	Atul Gupta Hello, I am facing on of problem related with analog input monitoring. CUP is 317F and AI module no.is 6ES7 336-4GE00-0AB0. (Fail Safe system) I have attached snap shots in which I can monitor alalog value in hardware but I cannot see the value in IW320. Please see the attached pic and tell me why it is happing? Please help me out. Hello. How did you solve the problem? Please help me.

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