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

2.14

Reference point approach (R1)

2.14.1

Signals to channel (DB21, ...)

DB21, ...
DBX1.0 Activate referencing
Edge evaluation: yes
Signal state 1 or The channel specific referencing is started with the interafce signal:
edge change DB21, ... DBX1.0 (Activate referencing)
0 → 1 .
The control acknowledges the successful start with 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.
If all the axes entered in REFP_CYCLE_NR have reached their reference point,
the interface signal:
DB21, ... DBX36.3 (all axes present)
is set.
Application If the machine axes are to be referenced in a particular sequence, there are the following
example(s) possibilities:
•
•
•
Corresponding to .... DB21, ... DBX33.0 (Referencing active)
DB21, ... DBX36.2 (all reference point required axes are referenced)
DB21, ...
DBX33.0 Referencing active
Edge evaluation: yes
Signal state 1 or The channel specific referencing was started with the interface signal:
edge change DB21, ... DBX1.0 (activate referencing)
0 → 1 and the successful start was acknowledged with the interface signal:
DB21, ... DBX33.0 (referencing active)
.
The channel specific referencing is operational.
Signal state 0 or •
edge change
•
1 → 0
•
Signal irrelevant for Spindles
...
Corresponding to .... DB21, ... DBX1.0 (activate referencing)
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Signal(s) updated: cyclic
The operator must observe the correct sequence when starting.
The PLC must check the sequence when starting or define it itself.
The function channel specific referencing will be used.
Signal(s) updated: cyclic
channel specific referencing is completed.
axis specific referencing is operational
no referencing active
Detailed Description
2.14 Reference point approach (R1)
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