Fisher DPR900 User Manual page 103

[FISHER-)
Configuration 5-47
Use FCODE 135 to select status of the Autotuner function
Function FCODE
Option No Default Selected
V&X Value
Autotuner 135 Disabled 0 0
Enabled 1
Enabled, break on alarm 2
Use FCODE 136 to select maximum initial output signal change. By
selecting a maximum output signal level during tuning, the user can
limit the output swing generated by the controller. The user is
reminded that the controller will only use the minimum swing required
to solve for PID. For a majority of applications, the default value (10%)
is adequate.
Function FCODE Option
No Default Selected
Value V&K?
Max Output
136
10 Percent 1 1
Signal 5 Percent 2
Change
3 Percent 3
Set a low output signal change percentage to use the autotuner for
processes with moderate deadtimes.
Use FCODE 137 to select controller dynamics. After one tuning it can
be used to change the dynamics without any retuning. Essentially this
FCODE controls the damping factor of the function. The figure shows
the dynamics of the four options.
Fast Medium
May 1991