Siemens SINUMERIK 840D sl Function Manual page 1019
Extended functions
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DB19
DBX 126.3
Data Block
Signal state 0 or
edge change
1 → 0
DB19
DBX 126.4
Data Block
Edge evaluation: No
Signal state 1 or
edge change
0 → 1
Signal state 0 or
edge change
1 → 0
DB19
DBX126.5
Data Block
Edge evaluation: No
Signal state 1 or
edge change
0 → 1
Signal state 0 or
edge change
1 → 0
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
19.2 Several Operator Panels on Several NCUs, Distributed Systems
MMC1_ACTIVE_PERM
Active/passive operating mode
PLC to MMC:
active operator panel must change to passive operating mode
MMC1_ACTIVE_CHANGED
Active/passive operating mode of MMC
Signal(s) updated: Cyclic
HMI to PLC:
Control unit has completed changeover from passive to active mode
HMI to PLC:
Control unit has completed changeover from active to passive mode
MMC1_CHANGE_DENIED
Operating mode changeover rejected
Signal(s) updated: Cyclic
HMI to PLC or PLC to HMI depending on status of interface:
Operating mode cannot be changed due to uninterruptible processes on active control unit.
HMI to PLC or PLC to HMI depending on status of interface:
Acknowledgement on MMC1_CHANGE_DENIED (FALSE → TRUE)
NC/PLC interface signals (Z2)
1019
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- Digital and Analog Nck I/Os (A4)
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