4. Miscellaneous
ORM0043_2
Modulating Controller Application Manual
Page 8
4.1 Supply Pressure Monitoring
Supply pressure monitoring can be included on hydraulic
positional systems to ensure that the hydraulic ring main
pressure is above the required minimum pressure in
order that the actuator can continue to be positioned.
If
Supply Px Check
is active then the hydraulic supply
pressure transmitter should be linked to
Supply Pressure
in order for the supply pressure to be monitored.
If the
Supply Pressure
drops below
Min Supply Px SP
for
greater than
Supply Px Delay
then
Low Supply Pressure
output is set active. If
Fail On Low SPx
is also active then
the actuator will position based on the fault override
settings.
If the
Supply Pressure
signal is in fault for greater than
Sig Fault Delay
then
Supply Press Flt
is set active. If
Fail
On Low SPx
is also active then the actuator will position
based on the fault override settings because it cannot be
certain the pressure has not dropped below the
minimum allowable supply pressure.
4.2 Controller Access
Whenever the controller is powered on the
Controller
On
output is set active. This is such that an output can be
provided to confirm that the controller is powered on.
Settings can be changed to affect when the controller
can be in Manual Mode.
If
Auto Mode Switch
is active then the controller will
instantly revert to Automatic mode. Once in Automatic
mode
Auto Mode Switch
will automatically reset to off
so that Manual mode can be accessed again.
To prevent access to Manual mode completely,
Auto
Mode Switch
can be linked to a digital input which can
hold
Auto Mode Switch
active and prevent access to
Manual mode.
If
Man Mode Timer
is active then the controller will
revert to Automatic mode if the controller is not in
Automatic mode for a specified time. The maximum
allowable time can be set by changing
Max Manual
Time
.
NOTE: A minimum manual time is hard set to 2 minutes.
If the
Max Manual Time
is set to less than 2 minutes
then the controller will revert to Automatic mode after 2
minutes.
