Yokogawa YVP20S - Manual (Page 93)

9-16
<9. CONFIGURATION SERVICES>
IM 21B04C50-01E
SP-PV Track in LO or IMan
Permits the setpoint to track the process variable when the actual mode of the block is LO
or IMan.
SP Track retained target
Permits the setpoint 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 will have 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 corresponding change in output.
When Direct is selected, an increase in PV results in an increase in the output.
Track Enable
This enables the external tracking function. If true, the value in TRK_VAL will replace 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 will then be LO.
Use PV for BKCAL OUT
The BKCAL OUT and RCAS OUT values are normally the working SP. If this option is
enabled, then the PV value will be used after the cascade is closed.
Restrict (Obey) SP limits if Cas or RCas
Normally the setpoint will not be restricted to the setpoint limits except when entered by a
human interface device. However, if this option is selected, the setpoint will be restricted to
the setpoint absolute limits in the Cas and RCas modes.
No OUT limits in Manual
Do not apply OUT_HI_LIM or OUT_LO_LIM when target and actual modes are Man. Trust
the operator to do the right thing.
● 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.
Use Uncertain as Good
If the status of the IN parameter is Uncertain, treat it as Good. Otherwise, treat it as BAD.
Target to Manual 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 (Target to next permitted mode if BAD CAS IN)
Sets the target mode to next permitted mode if the target mode is CAS and the status of
CAS_IN falls to BAD.