Siemens SIMATIC S5-90U, Системное руководство

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S5-90U/S5-95U Function Modules
Examples for Data Exchange between the Programmable Controller and the Counter Module
1) The counter module is plugged into slot 4. If you now wish to check whether your system for
position decoding has been synchronized by a reference point approach, you must scan the
sync bit in the diagnostic byte (bit 0). If this bit is set, a branch is to be made to FB20. The
position decoding operation is started in FB20.
Description STL
...
A I 97.0
JC FB20
...
Read in bit 0 of the diagnostic byte (sync bit).
If this bit is set, a branch is made to FB20.
If the bit is not set, program scanning is continued
with the statement following the block call.
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a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
2) Transferring the setpoints stored in flag words 0 and 2 to the counter module inserted into
slot 4. The module has only to accept the setpoints when the old setpoints have been reached
or exceeded.
STL Description
...
AN I 97.1
JC= L001
L FW 0
T QW 96
L001 AN I 97.2
JC= L002
L FW 2
T QW 98
L002 BE
...
If setpoint 1 has not yet been reached (bit 1=0), a
branch is made to label 1.
Read in setpoint 1
and transfer it to the counter module.
If setpoint 2 has not yet been reached (bit 2=0), a
branch is made to label 2.
Read in setpoint 2
and transfer it to the counter module.
Block end
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EWA 4NEB 812 6115-02b
16-41