Function active
<Auto change-over I/O (fieldbus failure> function activated.
8.13. Functions for FO cable connection
Requirements
FO cable module or FO coupler (for explosion-proof actuators) within actuator
controls.
8.13.1. FO cable monitoring: activate/deactivate
Actuator controls monitor the FO cable signal for communication, connection and
signal strength.
Device configuration M0053
FOC connection M0600
FO cable monitoring M0709
Default value: On (not final device)
Setting values:
On (not final device)
Monitoring is activated.
On loss of FOC connection, the following is signalled: Wrn FOC
Off (final device)
Monitoring is deactivated.
This setting is used if the actuator is the last participant within line topology, or for
all actuators within star topology.
8.13.2. FO cable topology: check setting
Required user level: .
Device configuration M0053
FOC connection M0600
FO cable topology M0637
Default value: Star/line
Setting values:
Star/line
Star, line topology
Ring
Ring topology
8.13.3. FO cable baud rate, check setting
Required user level: .
Device configuration M0053
FOC connection M0600
FO cable baud rate M0642
Default value: Auto
Setting values:
Auto
Automatic baud rate selection
9.6 kbit/s – 12000 kbit/s
Setting depending on fieldbus systems and FO cable module or FO coupler.
8.14. By-pass function
Application
The by-pass function is used, e.g. for district heating pipelines. Under high pipeline
pressure, the gate valve of the main valve cannot be used, pressure compensation
via by-pass valve is therefore required.
Requirements
●
<Additional inputs> or additional <Parallel interface>.
Function
Two MOVs – one main valve and one by-pass valve – are linked via enable signals
Bypass Sync In and By-pass Sync Out. Operation commands can only be executed
if one of the two actuators sends the enable signal to the other device. Enable
78
Actuator controls
Application functions ACV 01.2/ACVExC 01.2 Profibus DP
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