Val Controls IHP24-A Manual page 11

Fail position in Cascade Mode
If the Val Controls Device receives the status bad from the fieldbus, the device goes to its fail
position. The fail position is determined depending on configuration.
Example showing what will happen on the AO.OUT when one of the following errors occurs.
Fault Causes
• AO.CAS_IN.STATUS signal has status BAD
• Connection to SPUR is broken
Configuration
• AO.IO_OPTS, can be set to "0" (Disabled) or "Fault state to value"
• AO.FSTATE_VAL, the fail position 0.0% - 100.0%
Control Signal
• AO.CAS_IN – In cascade Mode
Output Signal
• AO.OUT –> Control signal SP-FLOW in Val Controls Device.
AO Block Mode - Cascade
AO.CAS_IN AO.CAS_IN
value Status
(0.0-100.0%)
67.0% Good
67.0% Bad
67.0% Good
67.0% Bad
67.0% Good
67.0% Bad
67.0% Good
67.0% Bad
AO Block Mode - OOS
Fieldbus AO block out of service.
The device goes to its hardware fail position. All solenoids are de-energized.
Error Code 801 is logged.
Val Controls A/S • Limfjordsvej 3 • DK-6715 Esbjerg N • Tel. +45 7547 0600 • Fax +45 7547 0611
DHP-UM-013
Revision: 4
SPUR AO.IO_OPTS
(Fail function)
Connect 0
Connect 0
Connect Fault state to
value
Connect Fault state to
value
Broken 0
Broken 0
Broken Fault state to
value
Broken Fault state to
value
vc@valcontrols.com • www.valcontrols.com
AO.FSTATE_VAL
(Fail position)
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
AO.OUT
Result
67.0%
67.0%
67.0%
0.0%
67.0%
67.0%
0.0%
0.0%
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