Table 2-11 General Tab Configuration Parameters - Honeywell UMC800 Reference Manual

Function Blocks
2.15 CARB Function Block,
Configuration Parameters, continued
Properties Group Parameter
Block
Descriptor
Control
46
continued

Table 2-11 General Tab Configuration Parameters

Index#
Order N/A
Tag Name
Algorithm N/A
N/A
Direction
Function Block Reference Guide
Parameter Description
Execution Order
8 character tag name
Block Desriptor
Control Algorithm
Note: In PID B, step
changes in setpoint will
not bump the output;
the output will slew
tosmoothly to the new
value.
In PID A, a step change
in setpoint will result in
a step change in output.
Control Action
Value or Selection
Read Only. See "Configure' Menu,
"Execution Order" to change.
PID A - is normally used for 3
mode control. The output can
be adjusted somewhere
between 100% and 0%. It
applies all three control
actions -Proportional(P),
Integral(I), and Derivative(D) -
to the error signal.
PID B - Unlike the PID-A
equation, the controller gives
only an integral response to a
setpoint change, with no
effect on the output due to the
Gain or Rate action, and
gives full response to PV
changes.
DUPA - like PIDA but
provides an automatic
method to switch tuning
constant sets for Heat/Cool
applications.
DUPB - like PIDB but
provides an automatic
method to switch tuning
constant sets for Heat/Cool
applications.
ATTENTION With PID B
or DUPB selection, you will
not be allowed to set
RESETor RPM to 0.00 (OFF).
Reset must be enabled.
DIRECT - PID action causes
output to increase as process
variable increases.
REVERSE - PID action
causes output to decrease as
process variable increases.
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