6.20 Setting the Operating Mode
Setting the operating mode
The operating mode setting determines the SFC control sequence.
The SFC supports the following operating modes:
● AUTO (process mode) - sequence is controlled automatically.
● MANUAL (operator mode) - sequence is controlled by the operator.
You can change from "MANUAL" to "AUTO"
● after enabling the switchover with the enable button
or
● Without enable, if the operator has the required authorization
(authorization level AUTO / MANUAL: "Process control")
You can change from "AUTO" to "MANUAL"
● after an enable of the changeover at the SFC (block input ENMAN) in the AS and
corresponding authorization (AUTO / MANUAL, operator process control)
or
● without an enable, if the operator has the corresponding authorization
(authorization level "MAN without enable": "Higher-order operator process control".
Note
To ensure that an operator cannot switch an SFC from AUTO to MANUAL mode, for example,
both operator inputs (changeover with or without enable) can be assigned an authorization
that the operator does not possess.
Alternatively, you can also block just the changeover without enable by assigning an
appropriate authorization. The changeover with enable is provided with an authorization that
is assigned to the operator. However, the enable is issued and revoked with a corresponding
control setting in the ENMAN input for the SFC in the AS.
The changeover is either permitted or refused, and different messages will be displayed
depending on the operator authorization and whether or not the enable has been issued.
Operating and monitoring SFCs
6.20 Setting the Operating Mode
SFC Visualization (V9.0)
64 Programming and Operating Manual, 05/2017, A5E41356392-AA
To Next Page
Loading...
