Yokogawa EJX930A - Manual (Page 121)

<Appendix 5. PID Block>
A5-3
IM 01C25T02-01E
Index
Parameter
Name
Default
(factory setting)
Write Valid Range Description
35 RCAS_OUT 0 — Remote setpoint sent to a computer, etc.
36 ROUT_OUT 0 — Remote control output value.
37 TRK_SCALE 100
0
1342
1
MAN Upper and lower scale limits used to convert the output
tracking value (TRK_VAL) to non-dimensional.
38 TRK_IN_D 0 Switch for output tracking. See Section A5.12 for
details.
39 TRK_VAL 0 Output tracking value (TRK_VAL).
When MODE_BLK.actual = LO, the value scaled from
the TRK_VAL value is set in OUT.
40 FF_VAL 0 Feedforward input value.
The FF_VAL value is scaled to a value with the same
scale as for OUT, multiplied by the FF_GAIN value, and
then added to the output of the PID computation.
41 FF_SCALE 100
0
1342
1
MAN Scale limits used for converting the FF_VAL value to a
non-dimensional value.
42 FF_GAIN 0 MAN Gain for FF_VAL.
43 UPDATE_EVT — Same as that for an AI block.
44 BLOCK_ALM — Same as that for an AI block.
45 ALARM_SUM Enable Same as that for an AI block.
46 ACK_OPTION 0xFFFF Same as that for an AI block.
47 ALARM_HYS 0.5% 0 to 50% Hysteresis for alarm detection and resetting to prevent
each alarm from occurring and recovering repeatedly
within a short time.
48 HI_HI_PRI 0 0 to 15 Priority order of HI_HI_ALM alarm.
49 HI_HI_LIM +INF PV_SCALE Setting for HI_HI_ALM alarm.
50 HI_PRI 0 0 to 15 Priority order of HI_ALM alarm.
51 HI_LIM +INF PV_SCALE Setting for HI_ALM alarm.
52 LO_PRI 0 0 to 15 Priority order of LO_ALM alarm.
53 LO_LIM -INF PV_SCALE Setting for LO_ALM alarm.
54 LO_LO_PRI 0 0 to 15 Priority order of LO_LO_ALM alarm.
55 LO_LO_LIM -INF PV_SCALE Setting for LO_LO_ALM alarm.
56 DV_HI_PRI 0 0 to 15 Priority order of DV_HI_ALM alarm.
57 DV_HI_LIM +INF Setting for DV_HI_ALM alarm.
58 DV_LO_PRI 0 0 to 15 Priority order of DV_LO_ALM alarm.
59 DV_LO_LIM -INF Setting for DV_LO_ALM alarm.
60 HI_HI_ALM — — Alarm that is generated when the PV value has
exceeded the HI_HI_LIM value and whose priority
order* is defined in HI_HI_PRI.
* Priority order: Only one alarm is generated at a time.
When two or more alarms occur at the same
time, the alarm having the highest priority order is
generated.
When the PV value has decreased below [HI_HI_
LIM - ALM_HYS], HI_HI_ALM is reset.
61 HI_ALM — — As above
62 LO_ALM — — As above
Reset when the PV value has increased above
[LO_LIM + ALM_HYS].
63 LO_LO_ALM — — As above
64 DV_HI_ALM — — Alarm that is generated when the value of [PV - SP] has
exceeded the DV_HI_LIM value. Other features are the
same as HI_HI_ALM.
65 DV_LO_ALM — — Alarm that is generated when the value of [PV - SP] has
decreased below the DV_LO_LIM value. Other features
are the same as LO_LO_ALM.