Modulating Controller Application Manual
Close and Hard Seat Fast are active then only the
Command Signal needs to be below the Close Limit to
hold the Close Solenoid active. This can be used to
ignore pulse zones and fully close the actuator quickly if
the actuator is normally in a stepping mode.
When Remote Open is active, the internal command is
set to 100% and will override the current command
signal. The controller will then position as if the
command signal had been set to 100%.
When Remote Close is active, the internal command is
set to 0% and will override the current command signal.
The controller will then position as if the command signal
had been set to 0%.
If both Remote Open and Remote Close are active then
they cancel each other out and the controller continues
to position based on the command signal.
Any fault condition overrides a digital override unless
Remote Override is active. If this is set active then the
controller will operate based on the digital override
signals even if a fault has occurred.
When the controller is in manual mode the Manual
Mode output is set active.
If in manual mode and Manual Enable is active then the
actuator can be positioned using the control switch.
Turning the switch away sets the internal command to
100%, and turning the switch towards sets the internal
command to 0%, and the controller will position the
actuator based on these values. When the switch is
returned to the centre the internal command matches
the Feedback so the actuator immediately stays put. If
Manual Enable is turned off then the actuator cannot be
positioned manually.
If Manual Fast Pos is active then pulse zones are ignored
and the actuator will open or close without pulsing the
solenoids. This can be used to move the actuator quickly
if it is normally in a stepping mode.
When the controller is in automatic mode, if the actuator
goes into fault the actuator can be forced to drive to a
required location. If Fault Open and Fault Close are both
off, or both are set active the actuator will fail last. If
Fault Open is active and Fault Close is off, on a fault the
internal command will be set to 100%. If Fault Open is off
and Fault Close is active, on a fault the internal command
will be set to 0%. In both cases the controller will
position the actuator based on these values.
If Fault Fast Pos is active then pulse zones are ignored
during a fault and the actuator will open or close without
pulsing the solenoids. This can be used to move the
actuator quickly if it is normally in a stepping mode.
If any fault is active in the controller then the System
Fault output is set active.
2.11 Feedback Signal Fault
If Feedback signal is in fault for greater than Sig Fault
Delay then Feedback Fault output is set active.
If Fail On Fdbk Flt is active then the actuator will position
based on the fault override settings. If Fail On Fdbk Flt is
off then the actuator will stay last.
2.12 Command Signal Fault
If Command Signal is in fault for greater than Sig Fault
Delay then Command Fault output is set active.
If Fail On Cmd Flt is active then the actuator will position
based on the fault override settings.
If 4-20mA Cmd Ctrl is active and Fail On Cmd Flt is off
then the actuator will stay last.
If both 4-20mA Cmd Ctrl and Fail On Cmd Flt are off then
the command fault will have no effect on controller
operation.
The Common Fault input is used to indicate than an
external fault has occurred and the controller must go
into fault mode.
If Common Fault is active then the Common Fault output
is set active and the actuator will position based on the
fault override settings. The Aux Solenoid output is also
set active such that and external fault can be used to
quickly fault the actuator.
If Cmn Flt Stop Pmp is also active then the Pump Output
will be set off which prevents the pump from running if a
common fault is present.
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