YOKOGAWA Admag TI AXG, User Manual

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<Appendix 5. PID Block>
280
IM 01E21A02-03EN
A5.3 Parameter List of PID Block
A blank in the Write Mode column indicates that the corresponding parameter can be written in all
modes.
Index
Parameter
Name
Default
Value
Write
mode
Valid
Range
Description
0 Block Header
TAG:
“PID”
Block Tag
= O/S
Same as that for the AI block.
1 ST_REV --- Same as that for the AI block.
2 TAG_DESC Null Same as that for the AI block.
3 STRATEGY 1 Same as that for the AI block.
4 ALERT_KEY 1 1 to 255 Same as that for the AI block.
5 MODE_BLK
6 BLOCK_ERR --- Same as that for the AI block.
7 PV ---
Measured value; Non-dimensional value
that is converted from the input (IN) value
based on the PV_SCALE values and
filtered.
8 SP 0 AUTO
PV_SCALE
±10%
Setpoint
9 OUT Man Output value.
10 PV_SCALE
100
0
1133
1
O/S
Scale conversion value for the input (IN)
value.
11 OUT_SCALE
100
0
1342
1
O/S
Scale values used for converting the control
output (OUT) value to actual amount.
12 GRANT_DENY 0 AUTO Same as that for the AI block.
13
CONTROL_
OPTS
0 O/S
Defines settings for control action.
See Subsection A5.13.1 for details.
14 STATUS_OPTS 0 O/S See Subsection A5.15.3 for details.
15 IN 0 Measurement input
16 PV_FTIME 2 AUTO
non
negative
Time constant (in seconds) of the first-order
lag filter applied to measurement input
17 BYPASS 1 (OFF) Man 1, 2
Switch whether to set the BYPASS
operation; set ON to bypass the control
operation.
18 CAS_IN 0 Cascade setpoint
19 SP_RATE_DN +INF Positive Rate-of-decrease limit for setpoint (SP)
20 SP_RATE_UP -INF Positive Rate-of-increase limit for setpoint (SP)
21 SP_HI_LIM 100
PV_SCALE
±10%
Upper limit for setpoint (SP)
22 SP_LO_LIM 0
PV_SCALE
±10%
Lower limit for setpoint (SP)
23 GAIN 1 Proportional gain
24 RESET 10 Integration time (seconds)
25 BAL_TIME 0 Positive Unused
26 RATE 0 Positive Derivative time (seconds)
27 BKCAL_IN 0 Read-back of control output
28 OUT_HI_LIM 100
OUT_
SCALE
±10%
Upper limit for control output (OUT)
29 OUT_LO_LIM 0
OUT_
SCALE
±10%
Lower limit for control output (OUT)
30 BKCAL_HYS 0.5(%) 0 to 50%
Hysteresis for release from a limit for OUT.
status
31 BKCAL_OUT 0 ---
Read-back value to be sent to the BKCAL_
IN in the high-level block