Integral Blocks
S5-115U Manual
Transfer the changed DB1 to the programmable controller.
Switch the programmable controller from STOP to RUN.
Changed DB1 parameters are accepted.
If you did not store the parameter block "ERT:" in DB1, you can localize the error in the ISTACK if
there was an incorrect parameter setting. However, you will not know what type of error is
present. The same thing applies if you made an error when you input the parameter block "ERT:".
11.3.3 How to Assign Parameters in DB1
As illustrated in Section 11.3.2, you use the following steps to change or expand the preset values
of DB1:
Display the default DB1, with its parameter block "ERT:" on the programmer.
Position the cursor on the desired parameter block.
Change or expand the parameters.
Transfer the changed DB1 to the programmable controller.
Switch the programmable controller from STOP to RUN.
Changed DB1 parameters are accepted.
The following applies when initializing in DB1:
•
Not all parameters of a parameter block must be defined in DB1. If some parameters are not
defined in DB1, the default setting of the relevant system data word automatically applies!
•
If you delete a DB1 in the PLC, the integral DB1 is retrieved by an overall reset of the CPU.
•
If you define parameter blocks in DB1 which are irrelevant for the CPU (e.g. computer link for
CPU 943), the CPU remains in the STOP state and generates a fault message (see Sec-
tion 11.3.5).
•
You can set parameters in either uppercase or lowercase.
Note
If the CPU detects a parameter error in DB1, it remains in the STOP mode even after
switching from STOP RUN (red STOP LED lights up).
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