Siemens SINUMERIK 840D sl Function Manual page 1032

Z2: NC/PLC interface signals
19.2 Several operator panels on several NCUs, distributed systems
DB19
DBX 126.1
Data Block
Edge evaluation: No
Signal state 1 or
edge change
0 → 1
Signal state 0 or
edge change
1 → 0
DB19
DBX 126.2
Data Block
Edge evaluation: No
Signal state 1 or
edge change
0 → 1
Signal state 0 or
edge change
1 → 0
DB19
DBX 126.3
Data Block
Edge evaluation: No
Signal state 1 or
edge change
0 → 1
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
1032
MMC1_MSTT_SHIFT_LOCK
Disable/enable MCP switchover
Signal(s) updated: Cyclic
MCP switchover is disabled.
The current MCP-NCU constellation remains unchanged.
MCP switchover is enabled
MMC1_ACTIVE_REQ
Control unit 1 requests active operating mode
Signal(s) updated: Cyclic
HMI to PLC: passive control unit 1 requests active operating mode
PLC to HMI: Request received
MMC1_ACTIVE_PERM
Active/passive operating mode
Signal(s) updated: Cyclic
PLC to HMI:
passive operator unit 1 can change to active 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
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions