HEIDENHAIN TNC 306 Technical Manual - Manual (Page 490)

1-2 TNC 406/TNC 306 1/98
Disabling of a group of NC keys by the PLC
PS B/W/D/K
0 : All keys
1-7 : 1st to 7th key group
CM 9183
PL B/W/D
0: Group of NC keys was disabled
-1: Group code > maximum value
M3171 = 0 if module execution was successful, 1 if not
Enabling of a group of NC keys by the PLC
PS B/W/D/K
0 : All keys
1-7 : 1st to 7th key group
CM 9184
PL B/W/D
0: Group of NC keys was enabled
-1: Group code > Maximum value
M3171 = 0 if module execution was successful, 1 if not
The groups of keys are arranged as follows:
0: All keys
1: ASCII keys
2: Soft keys 3: Cursor keys
4: Numerical keys 5: Operating mode keys
6: Block opening keys 7: Axis keys
Example: Disabling the operating mode keys
PS K+5 ;Operating mode group
CM 9183 ;Disable group of keys
PLW
= K+0
;If disabling OK
CMT ... ;Output acknowledgment
Example: Key simulation
If an existing PLC program is already using the key simulation, it can be quickly fixed with the
following code:
L M2813 ;KEY STROBE LOCAL
CMT 790 ;SEND KEY CODE
EM
;END OF MAIN PROGRAM
LBL 790
L M980
;WAIT FOR PROCESSING
JPT 799 ;KEY CODE ALREADY FIXED
PS W516 ;SEND KEY CODE
CM 9180
PL W240 ;RETURN CODE
L W240
< K+0
JPT 795
;ERROR
L W240