Siemens SIMATIC S5 ET 200U - Addressing

9-42
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
The counter module is addressed like a two–channel analog module
(ID 2AX).
Meaning of the bytes of a slot address (slot 1 with module address 72)
Table 9-6 Meaning of the Bytes of a Slot Address
Byte
Number
Byte
Address
Meaning
in PII
Meaning
in PIQ
0 72 Irrelevant High
Byte
Set
–
1 73 Diagnostics Byte Low
Byte
Set
–
point 1
2 74 High
Byte
Actual
High
Byte
Set
–
3 75 Low
Byte
Actual
Value
Low
Byte
Set
–
point 2
Data Exchange between the Programmable Controller and the Counter Module
1. The counter module has module start address 96. 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 diagnos-
tics byte (bit 0). If this bit is set, a branch is to be made to FB20. The po-
sition decoding operation is started in FB20.
STL
Description
LPW96
TIW96
A I 97.0
JC FB 20
Read in bit 0 of the diagnostics 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 fol-
lowing the block call.
Addressing
Example
Example
Function Modules