Addressing - Siemens SIMATIC S5 ET 200U Manual

Function Modules

Addressing

The counter module is addressed like a two–channel analog module
(ID 2AX).
Example Meaning of the bytes of a slot address (slot 1 with module address 72)
Table 9-6
Example Data Exchange between the Programmable Controller and the Counter Module
1. The counter module has module start address 96. If you now wish to
L
T
A
JC
9-42
Meaning of the Bytes of a Slot Address
Byte Byte
Number Address
0 72
1 73
2 74
3 75
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
PW 96
IW 96
I 97.0
FB 20
Meaning Meaning
in PII in PIQ
Irrelevant High
Byte
Diagnostics Byte Low
Byte
High High
Byte Byte
Actual Actual
Low Low
Value
Byte Byte
Description
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.
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
Set– Set–
point 1
Set– Set–
point 2