Table 2-39 General Tab Configuration Parameters - Honeywell UMC800 Reference Manual

Function Blocks
2.50 PID Function Block,
Configuration Parameters, continued
Properties Parameter
Group
Block Order
Tag Name
Descriptor
Control Algorithm
Direction
SP
Tracking
142
continued

Table 2-39 General Tab Configuration Parameters

Index# Parameter
Description
N/A Execution Order
N/A 8 character tag name
N/A Block descriptor
N/A 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.
N/A Control Action
N/A Setpoint Tracking
Function Block Reference Guide
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 PID A but provides an
automatic method to switch tuning
constant sets for Heat/Cool
applications.
DUPB - like PID B 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.
None
Track PV When control mode is
"manual", local
setpoint
process variable.
Track RSP When
setpoint
", local
setpoint setpoint
remote .
setpoint
Continued next page
tracks
is "remote
tracks
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