Siemens SINUMERIK 840Di sl Commissioning Manual page 439

References:
/FB1/ Function Manual, Basic Functions, R1 Reference point travel, Chapter "Referencing
with absolute value encoders"
Interface signals
Table 11-37 Referencing: Interface signals
DB number Bit, byte
Mode-groupspecific
11, ... 0.7
11, ... 1.2
Mode-groupspecific
11, ... 5.2
Channel-specific
21, ... 1.0
Channel-specific
21, ... 28.7
21, ... 33.0
21, ... 35.7
21, ... 36.2
Axis-specific
31, ... 1.5/1.6
31, ... 2.4-2.7
31, ... 4.6/4.7
31, ... 12.7
Axis-specific
31, ... 60.4/60.5
31, ... 64.6/64.7
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
NOTICE
The NC can detect a required readjustment of the absolute value encoder only during
the following events:
• Gear change with change of gear ratio
• Response to zero mark monitoring (alarm 25020)
• New encoder serial number after replacing the absolute encoder
Subsequently, the status of the absolute value encoder will be set back to 0
automatically by the NC (encoder not adjusted):
• MD34210 $MA_ENC_REFP_STATE[n] = 0
In all other cases, it is the sole responsibility of the user to indicate the uncalibrated
state of the absolute encoder by manually resetting the status to 0 (Encorder not
calibrated) and to repeat the calibration.
Name
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
Activate referencing
Signals from channel to PLC
(MMC -> PLC) REF
Referencing active
Reset
All axes that must have a reference point are referenced
Signals from PLC to axis/spindle
Position measuring system 1/position measuring system 2
Reference point value 1 to 4
Traversing keys minus/plus
Reference point approach delay
Signals from axis/spindle to PLC
Referenced, synchronized 1/Referenced, synchronized 2
Traverse command minus/plus
NC Commissioning with HMI Advanced
11.5 Axes and spindles
439