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5/25/2009 4:12 PM | |
Joined: 3/18/2009 Last visit: 5/6/2024 Posts: 306 Rating: (94) |
DearSsc_Mikro,
No, they are not redundant. Have a look at thisdiscussion.
If you are using Step 7, you don't have to do any additional programming. Just make sure that all error OBs are present as per thismanual.(Section 3.7, page 33) Also quoted below Required OBs Always download the following error OBs to the S7-400H CPU: OB 70, OB 72, OB 80,OB 82, OB 83, OB 85, OB 86, OB 87, OB 88, OB 121 and OB 122. If you ignore this,the fault-tolerant system changes to STOP when an error occurs.
You can also have a look at thispackage.
There is online help in step 7. But why do you want to use this SFC? The link-up and update are automatically performed as and when required. In most cases we do not need to use SFC90 hope it helps, regards.
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Last edited by: daga at: 5/25/2009 4:13 PM |
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