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Old May 13th, 2019, 09:37 AM   #1
Leukic
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Siemens S7-200 NO bit description?

First time looking at Siemens. Our thin brick saw would not go system ON which by troubleshooting the wiring it was an issue with an ESTOP. But upon looking in the PLC. I found no information besiades what you see here

S7-200 Siemens There are no Descriptions for the bits. Is this common or did the person that installed it just not provide it?

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Old May 13th, 2019, 09:46 AM   #2
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I am not familiar with S7-200, but I take a guess that the "sym" button in the toolbar above the editing window toggles symbols on and off.
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Old May 13th, 2019, 09:58 AM   #3
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Try what Jesper wrote.

Otherwise if memory serves me right, has been quite a few years since I used a S7-200, if program was uploaded from PLC you'll loose all comments. You need the original project file to get the comments. Or it was orignially done without comments (unlikely?).
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Old May 13th, 2019, 10:01 AM   #4
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The comments are not stored in the S7-200.

If your offline program does not have comments, then you have to start labeling things using the Symbol Table. I typically start with the I/O from a wiring diagram, then label internal values (M memory & V memory) as I figure out what they are.
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Old May 13th, 2019, 10:54 AM   #5
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Quote:
Originally Posted by sigmadelta View Post
The comments are not stored in the S7-200.

If your offline program does not have comments, then you have to start labeling things using the Symbol Table. I typically start with the I/O from a wiring diagram, then label internal values (M memory & V memory) as I figure out what they are.



Or even better, find original offline project from old backups or laptops
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Old May 13th, 2019, 11:06 AM   #6
Leukic
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Quote:
Originally Posted by sigmadelta View Post
The comments are not stored in the S7-200.
.
SLC03-4 are the same way. grrr
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Old May 14th, 2019, 07:48 AM   #7
Leukic
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Quote:
Originally Posted by sigmadelta View Post
The comments are not stored in the S7-200.

If your offline program does not have comments, then you have to start labeling things using the Symbol Table. I typically start with the I/O from a wiring diagram, then label internal values (M memory & V memory) as I figure out what they are.
Finally got an email back from the company that makes the saw. With pdf files of the electrical schematic. This will help tremendously as it wil be slow going in the plc. Still don't know **** about siemens for the most part.
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Old May 15th, 2019, 07:50 PM   #8
wimpiesplc
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about the comments about not having comments, the blocks appear to have names. if it would be a bare upload there would only be cryptic names (OB1; SRB1; SRB2 etc)
So my guess would also be the comment/symbolic view of adresses is turned off
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Old May 16th, 2019, 02:35 AM   #9
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Quote:
if it would be a bare upload there would only be cryptic names (OB1; SRB1; SRB2 etc)
I thought that, so I tried it, but the block names were uploaded from the PLC.
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Old May 16th, 2019, 07:11 AM   #10
Leukic
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Quote:
Originally Posted by wimpiesplc View Post
about the comments about not having comments, the blocks appear to have names. if it would be a bare upload there would only be cryptic names (OB1; SRB1; SRB2 etc)
So my guess would also be the comment/symbolic view of adresses is turned off
I have been going through and labeling them tedious but worth it.
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