P3: Basic PLC Program for SINUMERIK 840D sl
13.13 Block descriptions
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
981
13.13.7 FB 9: MtoN Control unit switchover
Function
This block allows switchover between several control units (HMI operator panel fronts and/or MCP machine
control panels), which are connected to one or more NCU control modules via a bus system.
References:
Function Manual, Extended Functions; Several Control Panels on Multiple NCUs, Decentralized Systems (B3)
The Interface between the individual control units and the NCU (PLC) is the M:N interface in the data block
DB19. The FB9 works with the signals of these interfaces.
Apart from initialization, sign-of-life monitoring and error routines, the following basic functions are also
performed by the block for control unit switchover:
WVar7 INT 0, 1 ... 7 Number of required half locations to left
WVar8 INT 0, 1 ... 7 Number of required half locations to right
WVar9 INT 0, 1 ... 7 Number of required half locations in upward
direction
WVar10 INT 0, 1 ... 7 Number of required half locations in downward
direction
WVar11 INT Number of required location type
WVar12 INT 0 ... 4 Specifies the required search direction
0: Empty location search strategy is set in
$TC_MAMP2
1: Upwards
2: Down
3: Symmetrical
Tabulated overview of functions:
Basic function Significance
HMI queuing HMI wants to go online with an NCU
HMI coming HMI is connecting to an NCU
HMI going HMI is disconnecting from an NCU
Forced break HMI must break connection with an NCU
Operating focus changeover to
server mode
Change operating focus from one NCU to the other
Active/passive operating mode: Operator control and monitoring/monitoring only
MCP switchover As an option, MCP can be switched over with the HMI
Parameterization
Signal Type Range of values Significance
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