07.97 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.2 General machine data (general data)
When allocating the numbers, make sure that there is no collision with other M functions.
Generally, the following values are permissible:
0, 1, 2, 3, 4, 5, 17, 19, 30, 37
Example
MD 260 = 123
MD 261 = 456
M1 = 123 LF
Selection of C axis operation for spindle 1
M3 = 456 LF
Deselection of C axis operation for spindle 3
Note:
After C axis mode has been selected, all axes involved in the functions G02, G03, G12, G13,
G33, G34, G35, G36 must first have been traversed with G90.
Example
N10 M70
(Selection of C axis operation)
N20 G0 C0 Z5
(Traverse axes involved in thread cutting operation)
N30 G36 C0 Z-15 K3 F200
(Thread cutting position-controlled axes)
TO allowance for protection zone adjustment
300
Lower input limit Upper input limit Units
0 0 9999 9999 IS
Active on
Power On
Note:
For further information see description of the function collision monitoring.
Output byte to user interface
1)
310
Lower input limit Upper input limit Units
00
91, 92, 93 and 94
999 (as from SW 4) -
Active on
Power On
Output byte to MIXED I/O
311
Lower input limit Upper input limit Units
00
11, 12, or 21, 22
999 (as from SW 4) -
Active on
Power On
With NC MD 310 and 311, the cam signals can be assigned to an output byte of a certain HW
MIXED I/O. Enter either 11 or 91 if using the 1st output byte of the 1st MIXED I/O. Entering 22
or 92 gives an analog assignment of the output byte to the 2nd byte of the 2nd MIXED I/O.
The decimal values for the synchronous interface to the PLC are entered in the same way.
Both MDs have a default setting of 0. If illegal values are entered, alarm 45 is triggered.
Assignment of MIXED I/O module for emergency retraction
to a mode group
2)
312 - 317
Default value Lower input limit Upper input limit Units
0 0 22, 94 (as from SW 4) –
Active on
Power On
A signal can be output via a MIXED I/O group to trigger a fast emergency retraction if a fault is
caused by external HW. One output byte is used for each mode group.
_______
1) As from SW 3
2) MD 314 to MD 317 as from SW 4
©
Siemens AG 1992 All Rights Reserved 6FC5197- AA50
6–23
SINUMERIK 840C (IA)