Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
1625
19.1.8
Signals to axis/spindle (DB31, ...)
DB21, ...
DBX318.7
Overstore active
Edge evaluation: No
Signal(s) updated: Cyclically
Signal state 1 or
edge change 0 → 1
The overstore function is enabled (with the channel-specific PI service "_N_OST_ON"). If the PI
service is denied, the signal will not change.
Signal state 0 or
edge change 1 → 0
The overstore function is disabled (with the channelspecific PI service "_N_OST_OFF"). If the PI
service is denied, the signal will not change.
DB31, ...
DBX1.0
Drive test travel enable
Edge evaluation: No
Signal(s) updated: Cyclic
Signal state 1 or
edge change
0 → 1
Safety handshake when the function generator is started by the NC.
If an axis is to be traversed without further operator intervention, using:
DB31, ... DBX61.0 (drive test travel request) = 1 signal,
the NC requests a travel enable signal (permissive signal) from the PLC control.
If all axis travel conditions are fulfilled, PLC acknowledges this with:
DB31, ... DBX1.0 (drive test travel enable) = 1 signal
The PLC always has the master authority in deciding whether an axis can be traversed.
Signal state 0 or
edge change
1 → 0
The NC does not request permission to move axis from the PLC with:
DB31, ... DBX1.0 (drive test travel enable) = 0 signal
Additional
references
/IDsl/ Commissioning Manual IBN CNC: NCK, PLC, Drive
DB31, ...
DBX1.3
Axis/spindle disable
Edge evaluation: No
Signal(s) updated: Cyclic
Signal state 1 or
edge change 0 → 1
- Axis disable
- Spindle disable
(Test status)
If the interface signal "Axis disable" is output - for this axis - no more position partial setpoints are
output to the position controller; the axis travel is therefore disabled. The position control loop
remains closed and the remaining following error is reduced to zero.
If an axis is moved with axis disable the actual value position display shows the setpoint position
and the actual velocity value display shows the setpoint velocity even though the machine axis is
not actually moving.
With a RESET the position actual value display is set to the real actual value of the machine.
Travel commands continue to be output to the PLC for this axis.
If the interface signal is canceled again the associated axis can again traverse normally.
If the interface signal "Axis disable" is set for a traversing axis, the axis is stopped with a ramp stop.
If the interface signal "Spindle disable" is set, as for axis disable, for this spindle no more speed
setpoints are output to the speed controller in the openloop control mode and no more position
partial setpoints are output to the position controller in positioning mode. The movement of the
spindle is thus disabled. The speed actual value display displays the speed setpoint value.
Spindle disable can only be canceled per "Reset" or with
M2
followed by a program restart.
If interface signal "Spindle disable" is set while a spindle is turning, the spindle is stopped according
to its acceleration characteristic.