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Siemens SINUMERIK 840D sl Function Manual page 1608

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Z1: NC/PLC interface signals
19.6 Mode group, channel, program operation, reset response (K1)
DB11
DBX6.3
Mode group ready
Signal state 0 or
The mode group is not ready. Possible causes for this are:
edge change
● A critical axis or spindle alarm is present
1 → 0
● Hardware faults
● The mode group has been incorrectly configured (machine data)
If the mode group ready changes to signal state "0", then:
● The axis and spindle drives are braked down to standstill with the max. braking current.
● The signals from the PLC to the NCk are brought into an inactive state (cleared state).
Special cases,
An alarm that withdraws the interface signal
errors, ......
DB11 DBX6.3 (mode group ready)
ensures that all channels of the mode group are no longer in the reset state.
In order to switch to another operating mode, a mode group reset (DB11 DBX0.7) must be made.
DB11
DBX6.7
All channels in the reset state
Edge evaluation: No
Signal state 1 or
All the channels that belong to this mode group are in the "channel status reset" state (DB21, ...
edge change
DBX7.7).
0 → 1
Signal state 0 or
At least one of the channels in the mode group is not in "channel status reset" (DB21, ... DBX7.7).
edge change
1 → 0
Corresponding to ...
DB21, ... DBX7.7 (channel state, reset)
DB11
DBX7.0
Active machine function TEACH IN
Edge evaluation: No
Signal state 1 or
Machine function TEACH IN is active in the mode group.
edge change
0 → 1
Signal state 0 or
Machine function TEACH IN is not active.
edge change
1 → 0
Additional references Operating Manual HMI (corresponding to the used software)
DB11
DBX7.1
Active REPOS machine function
Edge evaluation: No
Signal state 1 or
Machine function REPOS is active in the mode group.
edge change
0 → 1
Signal state 0 or
Machine function REPOS is not active.
edge change
1 → 0
1608
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions

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