Siemens SINUMERIK Series - Teach-in via window

Z2: NC/PLC interface signals
18.2 Distributed systems (B3)
Extended Functions
Function Manual, 03/2013, 6FC5397-1BP40-3BA1
853
Bit signals
DB19
DBX 126.0
Data Block
MMC1_SHIFT_LOCK
Disable/enable control unit switchover
Edge evaluation: No Signal(s) updated: Cyclic
Signal state 1 or
edge change
0 → 1
Control unit switchover or change in operating focus is disabled.
The current control unit-NCU constellation remains unchanged.
Signal state 0 or
edge change
1 → 0
Control unit switchover or change in operating focus is enabled
DB19
DBX 126.1
Data Block
MMC1_MSTT_SHIFT_LOCK
Disable/enable MCP switchover
Edge evaluation: No Signal(s) updated: Cyclic
Signal state 1 or
edge change
0 → 1
MCP switchover is disabled.
The current MCP-NCU constellation remains unchanged.
Signal state 0 or
edge change
1 → 0
MCP switchover is enabled
DB19
DBX 126.2
Data Block
MMC1_ACTIVE_REQ
Control unit 1 requests active operating mode
Edge evaluation: No Signal(s) updated: Cyclic
Signal state 1 or
edge change
0 → 1
HMI to PLC: passive control unit 1 requests active operating mode
Signal state 0 or
edge change
1 → 0
PLC to HMI: Request received