User Manual

<Appendix 1. Function Block Parameters>
A-12
IM 21B04C01-01E
A1.6 Parameters of PID Block (Optional)
Index: PID1: 8000 through 8065
PID2: 8100 through 8165
Relative
Index
Index
Parameter
Name
Default
(factory setting)
Write Description
0 8000 BLOCK
HEADER
Block tag
= O/S
Information about this block, including the block tag, DD
revision, execution time.
1 8001 ST_REV 0 — Incremented when a change is made to the parameter
settings for the PID block to indicate the revision level of
the settings, and used to see whether there is a change
in parameter settings.
2 8002 TAG_DESC Spaces Universal parameter storing the description of the tag.
3 8003 STRATEGY 1 Universal parameter used by an upper-level system to
classify the function blocks.
4 8004 ALERT_KEY 1 Universal parameter used as a key to identify the point
from which an alert is issued; normally used by an upper-
level system to select alerts to provide to a particular
operator who covers a specic area of the plant.
5 8005 MODE_BLK O/S Universal parameter that indicates the block operation
conditions and is composed of actual mode, target
mode, permitted modes, and normal mode.
6 8006 BLOCK_ERR — — Indicates the error statuses related to the block itself.
7 8007 PV — — Indicates the primary analog value (or the corresponding
process value) used to execute the specied actions,
and the status of that value.
8 8008 SP — Auto Setpoint of the block.
9 8009 OUT — Man Value and status of output.
10 8010 PV_SCALE 0-100% O/S Upper and lower scale limit values used for scaling of the
input (IN) value.
11 8011 OUT_SCALE 0-100% O/S Upper and lower scale limit values used for scaling
of the control output (OUT) value to the values in the
engineering unit.
12 8012 GRANT_
DENY
0 Option to control access from the host computer and
local control panel to tuning and alarm parameters.
13 8013 CONTROL_
OPTS
0x0000 O/S Denes block actions depending on block status
conditions.
14 8014 STATUS_
OPTS
0x0000 O/S Denes options for control actions of block.
15 8015 IN 0 Controlled-value input.
16 8016 PV_FTIME 0 Time constant (in seconds) of the rst-order lag lter
applied to IN.
17 8017 BYPASS 1 Man Determines whether to bypass control computation.
1 = off; do not bypass.
2 = on; bypass.
18 8018 CAS_IN 0 Cascade setpoint.
19 8019 SP_RATE_
DN
+INF Rate-of-decrease limit for setpoint (SP).
20 8020 SP_RATE_UP +INF Rate-of-increase limit for setpoint (SP).
21 8021 SP_HI_LIM 100 Upper limit for setpoint (SP).
22 8022 SP_LO_LIM 0 Lower limit for setpoint (SP).
23 8023 GAIN 1 Proportional gain (= 100 / proportional band).
24 8024 RESET 10 Integration time (seconds).
25 8025 BAL_TIME 0 Unused.
26 8026 RATE 0 Derivative time (seconds).
27 8027 BKCAL_IN 0 Readback of control output.
28 8028 OUT_HI_LIM 100 Upper limit for control output (OUT).
29 8029 OUT_LO_LIM 0 Lower limit for control output (OUT).
30 8030 BKCAL_HYS 0 Hysteresis for release from a limit for OUT.status.
31 8031 BKCAL_OUT — — Read-back value to be sent to the BKCAL_IN of the
downstream block.
32 8032 RCAS_IN 0 Remote setpoint set from the host computer.