IP244
C79000–B8576–C866–01
7–18
There is the following deviation from SIMATIC S5:
Direct/indirect addressing:
Distinction between direct and indirect addressing is no longer necessary
in SIMATIC S7. Constants and operand areas can both be specified in the
parameters. The ADRA parameter has therefore been omitted, and the
areas for command, message frame number, module address, DB number
for DB-a, and addressing type no longer exist.
ANST:
In contrast to SIMATIC S5, the ANST parameter must be set to ’1’ in di-
rect and in indirect parameter setting in order to trigger the execution of a
command.
BEF:
The parameter BEF is an input parameter. The FC 162 function does not
clear this parameter after the command has been executed.
Error number for PAFE:
The PAFE parameter is set to ’1’ if the FC 162 detects an error. With the
S5 bock, the additional error information is stored in flag byte MB 255.
With the S7 bock, the additional error information is stored in data byte
DBB 31 of the data block DB-A.
Exception:
Only the PAFE parameter is set to ’1’ if an illegal or non-existing DB-A
data block has been specified. There is no additional error information in
this case.
The FC 162 does not clear the DBB 31 data byte. This means that an error
number remains in the DB-A until it is overwritten by a new one.
Deviation from
SIMATIC S5
FC162
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