Description Of Fb9 - Siemens SINUMERIK 840D sl Function Manual

Step 4:
Include FB9 in the PLC user program. You will find more details in the following section.
2.15.4.4

Description of FB9

Function description
This block allows switchover between several operator panels (PCU with operator panel
and/or machine control panel), which are connected to one or more NCU control modules via
a bus system.
The interface between the individual operator panels and the NCU (PLC) is the M:N interface
in data block DB19 (see Section "Signal descriptions" and /LIS/, Lists).
FB 9 uses the signals of this interface.
Apart from initialization, sign-of-life monitoring and error routines, the following basic
functions are also performed by the block for control unit switchover:
Table 2-7
Basic function
PCU sends request
PCU coming
PCU going
Suppression
Operating focus switchover in server mode Switch operating focus from one NCU to the other
Active/passive operating mode
MCP switchover
The following descriptions supplement the information in "Description of operational
sequences (overview)" and "Description of operational sequences (details)" with particular
reference to the behavior in the last three examples.
Brief description of important functions
Active/passive operating mode
An online PCU can operate in two different modes:
Active mode: Operator can control and monitor
Passive mode: Operator can monitor (PCU header only)
After switchover to an NCU, this initially requests active operating mode in the PLC of the
online NCU. If two PCUs are connected online on one NCU simultaneously, one of the two is
always in active and the other in passive mode. The operator can request active mode on
the passive PCU at the press of a button.
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Several Operator Panels on Several NCUs, Distributed Systems (B3)
Overview of the functions
Meaning
PCU wants to go online with an NCU
PCU is connecting to an NCU
PCU is disconnecting from an NCU
PCU must break connection with an NCU
Operator control and monitoring/monitoring only
As an option, MCP can be switched over with the PCU
2.15 Examples
229