Referencing: Interface signals
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
The axis will not move if the traversing key is pressed!
The value entered in MD34100: REFP_SET_POS[n] (ref. point value) is dis-
played on the actual-value display of the appropriate traversing key.
8. The adjustment of the absolute encoder of this machine axis is thus com-
For time-optimized adjustment of several machine axes, the following procedure
1. Traverse all or several machine axes (as far as permitted by the machine
design) to the adjustment point (see above, Points 1 – 5).
2. Switch over to: JOG/REF mode (Point 6).
3. Carry out the adjustment for each machine axis (Point 7).
A readjustment of the absolute encoder is required:
after dismantling/installing the encoder or the motor with absolute encoder
if data are lost in the NC SRAM, battery voltage failure, PRESET,
in the case of gear change between load and absolute encoder.
The status in
MD34210: ENC_REFP_STATE[n] (status of absolute encoder)
is only reset by the NC automatically in the case of gear change.
In all the other cases, the user must reset the status to 0 = "Encoder not ad-
justed" by himself/herself and provide for readjustment.
Signals from PLC to mode group
Mode group reset
Machine function REF
Signals from mode group to PLC
Active machine function REF
Signals from PLC to channel
Signals from channel to PLC
(MMC –––> PLC) REF
All axes to be referenced are referenced.
10 NC Start-Up with HMI Advanced
10.5 Axes and spindles