Siemens SINUMERIK 840C User Manual
Page 341
6 NC Machine Data (NC MD), NC Setting Data (NC SD)
10.94
6.6.6 Channel-specific MD bits 2
7
6
5
4
3
2
1
0
Bit No.
NC MD
914*
Channel
with FIFO
(up
to
SW2)
Default value:
all bits default to 0
Bit 0
Bit 0=0 Channel without FIFO
Bit 0=1 Channel with FIFO
Active: On warm restart/Power On
If FIFO is selected for the four MDs only once, the entire storage space (30 Kbytes) is
allocated to the respective channel.
If two FIFO channels are selected, these two channels share the available storage space
(15 Kbytes per channel).
If more than two channels are defined, an error message (”Too many FIFO channels defined”
alarm) is issued.
7
6
5
4
3
2
1
0
Bit No.
NC MD
916*
Toggle
output bit 7
on emer-
gency
retraction
1)
Toggle
output bit 6
on emer-
gency
retraction
1)
Toggle
output bit 5
on emer-
gency
retraction
1)
Toggle
output bit 4
on emer-
gency
retraction
1)
Toggle
output bit 3
on emer-
gency
retraction
1)
Toggle
output bit 2
on emer-
gency
retraction
1)
Toggle
output bit 1
on emer-
gency
retraction
1)
Toggle
output bit 0
on emer-
gency
retraction
1)
Toggle of outputs for retraction enabled: Bits 7 to 0
Bit 0-7
Bit 0-7=1
The corresponding bit in the output byte of the mixed I/O module is
inverted when a retraction is triggered by this channel.
Bit 0-7=0
The corresponding bit in the output byte of the mixed I/O module
remains unaltered on retraction.
Active: at once
7
6
5
4
3
2
1
0
Bit No.
NC MD
918*
NC-
controlled
ext. stop.
and retract.
1)
Trigger
alarm +
mode group
stop on
error
1)
Bit 1 Bit 1=1 NC-controlled extended stopping and retraction enabled.
Bit 1=0 NC-controlled extended stopping and retraction disabled.
Bit 0 Bit 0=1 When a fault is detected an alarm and Mode Group Stop is triggered and, with
it, stopping as well as retraction is requested.
Bit 0=0 No alarm or Mode Group Stop is triggered if a fault is detected.
_______
1)
As from SW 4
6–156
©
Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)