Siemens SINUMERIK 828D

Z1: NC/PLC interface signals
19.2 Axis monitoring, protection zones (A3)
Basic Functions
1654 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
19.2.3 Signals to axis/spindle (DB31, ...)
DB21, ...
DBX276.0 –
DBX277.1
Machinerelated protection zone 1 (...10) violated
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 1
The activated, machinerelated protection zone 1 ( ...10) is violated in the current block or in the
current JOG movement.
The pre-activated, machinerelated protection zone 1 ( ...10) would be violated in the current block if
it would be activated by the PLC.
Signal state 0
or edge change
1 → 0
The activated, machinerelated protection zone 1 (...10) is not violated in the current block.
The pre-activated, machinerelated protection zone 1 (...10) would not be violated in the current
block if it would be activated by the PLC.
Application
example(s)
Before parts are moved into the working zone - this IS can be used to check as to whether the tool or
workpiece is located in the machinerelated protection zone of the part to be moved in.
DB21, ...
DBX278.0 -
DBX279.1
Channelspecific protection zone 1 (...10) violated
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 1
The activated, channelspecific protection zone 1 ( ...10) is violated in the current block.
The pre-activated, channelspecific protection zone 1 ( ...10) would be violated in the current block if
it would be activated by the PLC.
Signal state 0 or
edge change
1 → 0
The activated, channelspecific protection zone 1 ( ...10) is not violated in the current block.
The pre-activated, channelspecific protection zone 1 (...10) would not be violated in the current
block if it would be activated by the PLC.
Application
example(s)
Before parts are moved into the working zone - this IS can be used to check whether the tool or
workpiece is located in the channelspecific protection zone of the part to be moved-in.
DB31, ...
DBX2.3 Clamping in progress
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 1
Clamping in progress.
The clamping monitoring function is activated.
Signal state 0 or
edge change
1 → 0
Clamping completed.
The clamping monitoring function is replaced by the standstill (zero speed) monitoring.
Corresponding to .... MD36050 $MA_CLAMP_POS_TOL (Clamping tolerance)
DB31, ...
DBX3.6 Velocity/spindle speed limitation
Edge evaluation: no Signal(s) updated: cyclic
Signal state 1 or
edge change
0 → 1
The NCK limits the velocity/spindle speed to the limit value set in the machine data:
MD35160 $MA_SPIND_EXTERN_VELO_LIMIT