Siemens SINUMERIK 840D sl Function Manual page 482

Data descriptions
9.6 Interface signals
Bit 0
= 1
= 1
"Axis is SI axis" status signal
DB3x.DBX70.4: "NCK Safety Integrated active"
Description of signals from the monitoring channel
The individual signals that are transferred from the monitoring channel are listed in the
following.
SGA SBH/SG active
This signal is used to signal the drive monitoring channel the status of the SBH and SG
functions as follows:
0 signal: SBH/SG is not active
1 signal: SBH/SG is active
SGA status, pulses are cancelled (drive only)
After the switch-off signal path test has been initiated using the SGE test stop selection or if a
limit value is violated with a resulting STOP A response, this signal is output to indicate that
the drive pulses have been internally cancelled.
For all axes, the signal is initialized with the value "1"; for non-SI axes, the signal permanently
stays at a value of "1" (see Chapter "Switch-off signal paths (Page 103)".
Note
To identify as to whether an SI axis is available, the axis-specific signal "NCK Safety Integrated
active" can be evaluated.
0 signal: Pulses are enabled
1 signal: Pulses have been cancelled
SGA axis safely referenced
This indicates as to whether the relevant axis/spindle has been safely referenced (see Chapter
"Axis states (Page 90)").
0 signal: Axis is not safely referenced
1 signal: Axis is safely referenced
482
Bit 1 Active setpoint limiting factor
= 0 SAFE_DES_VELO_LIMIT2
= 1 SAFE_DES_VELO_LIMIT3
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated