Technical Specifications

95
PID Control and Status Option
Configuration Services
SP Track Retain Permits the Set Point to track the RCAS or CAS parameter
based on the retained target mode when the actual mode of the
block is IMan, LO, Man, or ROut. When SP-PV track options
are enabled, then SP Track retained target has precedence in
the selection of the value to track when the actual mode is Man,
IMan, Rout, and LO.
Direct Acting Defines the relationship between a change in PV and corre-
sponding change in output. When Direct is selected, an
increase in PV results in an increase in the output.
Balance Ramp (Not used- reserved)
Track Enable This enables the external tracking function. If true, the value in
TRK VAL replaces the value of OUT if TRK IN D becomes true
and the target mode is not Man.
Track in Manual This enables TRK VAL to replace the value of OUT when the
target mode is Man and TRK IN D is true. The actual mode is
then LO.
PV for BKCAL OUT The BKCAL OUT and RCAS OUT values are normally the
working SP. If this option is enabled the PV value is used after
the cascade is closed.
Restrict SP to limits in
CAS or RCAS
Normally the Set Point is not restricted to the setpoint limits
except when entered by a human interface device. However, if
this option is selected, the Set Point is restricted to the setpoint
absolute limits in the Cas and RCas modes.
No output limits in
Man
Do not apply OUT HI LIM or OUT LO LIM when target and
actual modes are Man. Lets the operator apply these limits.
PID Status Options
IFS if BAD IN Set Initiate Fault State status in the OUT parameter if the status
of the IN parameter is BAD.
IFS if BAD CAS_IN Set Initiate Fault State status in the OUT parameter if the status
of the CAS IN parameter is BAD.
Uncertain as Good If the status of the IN parameter is Uncertain, treat it as Good.
Otherwise, treat it as BAD.
Target to Man if BAD
IN
Set the target mode to Man if the status of the IN parameter is
BAD. This latches a PID block into the Man state if the input
ever goes bad.
No Select if Not Auto Sets the target mode to next permitted mode if the target mode
is CAS and the status of CAS IN falls to BAD.