Siemens SINUMERIK 840C Installation Instructions Manual page 616

8 PLC Machine Data (PLC MD)
8.5 PLC MD for the operating system (system bits)
PLC MD
DB63
7
DW No.
6052
DL 26
7
6053
DR 26
7
Default value: 0
An EU interface module's eight interrupt inputs can be enabled separately.
Bit = 0 Input is disabled
Bit = 1 Input is enabled for OB 2 call
Also see PLC MD 30.
PLC MD
DB63
7
DW No.
6055
DR 27
7
6056
DL 28
7
Default value: 0
A signal change at an EU IM interrupt input triggers the interrupt that invokes OB 2 (enable via
PLC MD 6052). The signal edge (i.e. positive or negative edge) that is to trigger the interrupt
can be specified separately for each interrupt input.
Bit = 0 Positive edge triggers interrupt
Bit = 1 Negative edge triggers interrupt
The system program checks the machine data for the interrupt-generating I/Os for validity on
cold restart. The PLC issues an error message and goes to STOP when illegal machine data
are encountered. Also see PLC MD 30.
PLC MD
DB63
7
DW No.
6061
DR 30
Default value: All bits default to 0
8–24
Bit No.
6 5 4
Enable central interrupt byte IF PLC/PLC 135 WD
6 5 4
Reserved
6 5 4
Bit No.
6 5 4
Edge central interrupt byte IF PLC/PLC 135 WD
6 5 4
Reserved
6 5 4
Bit No.
6 5 4
© Siemens AG 1992 All Rights Reserved
3 2 1
3 2 1
3 2 1
3 2 1
3 2 1
3 2 1
3 2 1
6FC5197- AA50
SINUMERIK 840C (IA)
09.95
0
0
0
0
0
0
0