5/8/2020 4:28 AM | |
Posts: 83 Rating: (0) |
Any more input will be appreciated. |
5/8/2020 10:09 AM | |
Joined: 2/5/2013 Last visit: 9/20/2024 Posts: 321 Rating: (74) |
Hi JL99, To give proper comments for network or used memory/data bits First you need understand process or operation of machine and how it works. If you have not worked with process then there lot of open source documents/videos and you need to search it on Google. Visualisation is more important to understand working of process and it can be acheived by simulating or testing PLC and SCADA program with actual hardware or simulator. first understand flow of program and note down important process interlock which is written PLC code. It will be better to ask your colleague for documents like P&ID,Eectrical diagram and function specification document with refrence to which code is written. If you working first time for this activity then it will be always better to you ask your colleague to alteast give overview program structure and how it works then you will spent less time for debugging or reverse engineering. Br, AmolG. |
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This contribution was helpful to2 thankful Users |
5/12/2020 4:09 AM | |
Posts: 83 Rating: (0) |
Hi AmolG The problem is that I am provided with a PLC program without comments, HMI program, electrical diagram and nothing else. I am trying to figure how the program is written and add comments. When I look at the program, there are with DB array elements. So im breaking down HMI and listing all DBs in excel sheet and hopefully I can figure out something from that. Can you tell me that is it DOable or not? Sorry if my question is weird. Tks
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5/12/2020 9:08 AM | |
Joined: 2/5/2013 Last visit: 9/20/2024 Posts: 321 Rating: (74) |
Hi JL99, I have done this kind of activity.It requires patience,lot of reverse engineering need to spent more time on debugging the logic. If logic complexity is not that much critical and you have confidence that you can complete this activity then you can proceed. Br, AmolG |
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