Reference Point Approach (R1); Signals To Channel (Db21 - Siemens SINUMERIK 840D sl Function Manual

Z1: NC/PLC interface signals

19.10 Reference point approach (R1)

19.10 Reference point approach (R1)
19.10.1

Signals to channel (DB21, ...)

DB21, ...
DBX1.0 Activate referencing
Edge evaluation: Yes
Signal state 1 or Channel-specific referencing is started using the interface signal:
edge change DB21, ... DBX1.0 (activate referencing).
0 → 1
The control acknowledges a successful start using the interface signal:
DB21, ... DBX33.0 (referencing active)
With the channel-specific referencing each machine axis, which is allocated to a channel, can be
referenced (control internals are simulated by traversing keys plus/minus).
Using the axis-specific machine data:
MD34110 $MA_REFP_CYCLE_NR (axis sequence for channel-specific referencing)
can determine in which sequence the machine axes are referenced.
When all of the axes entered in REFP_CYCLE_NO have reached their reference point,
the interface signal:
DB21, ... DBX36.3 (all axes stationary)
is set.
Application exam‐ If the machine axes are to be referenced in a particular sequence, there are the following possibilities:
ple(s)
● The operator must observe the correct sequence when starting.
● The PLC must check the sequence when starting or define it itself.
● The channel-specific referencing function will be used.
Corresponding to ... DB21, ... DBX33.0 (activate referencing)
DB21, ... DBX36.2 (all axes with obligatory reference point are referenced)
DB21, ...
DBX33.0 Referencing active
Edge evaluation: Yes
Signal state 1 or The channel-specific referencing was started using the interface signal:
edge change DB21, ... DBX1.0 (activate referencing)
0 → 1 and the successful start was acknowledged using the interface signal:
DB21, ... DBX33.0 (referencing active).
The channel-specific referencing is operational.
Signal state 0 or
● Channel-specific referencing is completed
edge change
● Axis-specific referencing is running
1 → 0
● No referencing active
Signal irrelevant Spindles
for ...
Corresponding to ... DB21, ... DBX1.0 (activate referencing)
1632
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions