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05.91
6 NC Channel/PLC Interface (DB 10 ... DB 25)
6.4.1 Operating modes
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MODE SELECTION SWITCH
DW 0, bit 8 to 11
The PLC user program uses this signal to determine the mode in which the channels of a
mode group operate.
The mode can be specified, for example, with the selection switch on the machine control
panel. The modes are coded as follows:
Mode
selection
switch
position
Code
D
C
B
A
Mode
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0
0
0
1
0
0
1
1
0
0
1
0
0
1
1
0
0
1
1
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
1
1
0
0
1
1
0
0
0
1
0
0
0
PRESET
MDA
MDA
JOG
INCR
1
INCR
10
INCR
100
INCR
1000
INCR
10000
REPOS
AUT
AUT
REF
(REF)
(REF)
(REF)
Notes:
•
The modes are interpreted only by the 1st channel (master channel) of the mode group.
•
When the operating mode MDA, PRESET or REF is selected, a reset is triggered in the
NC.
•
The mode change is not effected in the control until all axes of the mode group are at a
standstill (exact stop coarse).
©
Siemens AG 1991 All Rights Reserved 6ZB5 410-0HE02
6
–
7
SINUMERIK 880 (PJ)