Siemens SIMATIC OEM PP32, Equipment Manual

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OEM Push Button Panel Equipment Manual
Release 08/98
Control Bit Assignment
This chapter explains the relationship between the control bits and the keys and
LEDs assigned to them on the Push Button Panels.
The following figures clarify the numeration of keys, LEDs and digital inputs/
outputs on the Push Button Panel, and their links to bits in the PLC.
Keys
8
1
Bit 7 Bit 0
T8 T1
T16 T9
Byte n
Byte n+1
32
25
T24 T17
T32 T25
Byte n+2
Byte n+3
Figure 3-1 Numeration of keys on the Push Button Panel
1
16
Digital Inputs (DI)
Bit 7 Bit 0
DI8 DI1
DI16 DI9
Byte n
Byte n+1
Figure 3-2 Numeration of the digital inputs on the Push Button Panel
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