Fb 9: Mton Control Unit Switchover - Siemens SINUMERIK 828D Function Manual

Parameterization
Signal Type
WVar7 INT
WVar8 INT
WVar9 INT
WVar10 INT
WVar11 INT
WVar12 INT
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
DB 19. The FB 9 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:
Tabulated overview of functions:
Basic function
HMI queuing
HMI coming
HMI going
Forced break
Operating focus changeover to
server mode
Active/passive operating mode:
MCP switchover
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Range of values
0, 1 ... 7
0, 1 ... 7
0, 1 ... 7
0, 1 ... 7
0 ... 4
Significance
HMI wants to go online with an NCU
HMI is connecting to an NCU
HMI is disconnecting from an NCU
HMI must break connection with an NCU
Change operating focus from one NCU to the other
Operator control and monitoring/monitoring only
As an option, MCP can be switched over with the HMI
P3: Basic PLC Program for SINUMERIK 840D sl
Significance
Number of required half locations to left
Number of required half locations to right
Number of required half locations in upward
direction
Number of required half locations in downward
direction
Number of required location type
Specifies the required search direction
0: Empty location search strategy is set in
$TC_MAMP2
1: Upwards
2: Down
3: Symmetrical
13.13 Block descriptions
981