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Operation
-
Using
Two Sets of Tuning Constants (PID Values)
136
DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual
Release M
April 2017
5.9 Using Two Sets of Tuning Constants (PID Values)
Introduction
You can use two sets of tuning constants for single output types and choose the way they are to be
switched.
The sets can be:
Keyboard selected
Automatically switched when a predetermined Process Variable value is reached.
Automatically switched when a predetermined Setpoint value is reached.
The following procedures show you how to:
Select two sets
Set the switchover value
Set tuning constant value for each set
Switch between two sets via the keyboard (without automatic switchover)
ATTENTION
For recorders with two controllers (both enabled) remember that any controller-related values
displayed correspond with the lighted CHN indicator
— “1” means that the values apply for
Controller #1 and “2” means that the values apply for Controller #2.
Select two sets
Table 5-19 tells you how to select two sets of tuning constants.
Table 5-19 Procedure for selecting two sets of tuning constants
Step
Operation
Press
Action/Result
1
Select Control Set Up
group
SET
UP
Until you see:
Upper Display:
SET UP
Lower Display:
CONTROL
2
Select
PID SETS function
FUNC
You will see:
Upper Display:
Available selections are
—
1 ONLY
– 1 set of constants
2 KEYBD
– 2 sets, keyboard selectable
2 PVSW
– 2 sets, auto switch at PV value
2 SPSW
– 2 sets, auto switch at SP value
Lower Display:
PIDSETS
▲
or
▼
Select the type of PID set.
Set switchover value
If you select 2 PVSW or 2 SPSW, you must set a value at which the sets will switch over.
Table 5-20 shows you how to set this value.