Pid Controller Fcm - ABB 800xA Operation

Appendix A Runtime Templates

PID Controller FCM

This section describes the active runtime fields on the controller FCM templets.
The PID controller FCM is treated in a different manner from other FCMs because
the PID Controller FCM Templet can have children. These children are the Adaptive
Gain and Adaptive Reset Templets. When you fill in a templet planning form for a
PID controller, the entry you make to the ADAPTIVE CONTROL field determines
whether you need to fill in the Adaptive Gain and/or Adaptive Reset templets.
If the entry to the ADAPTIVE GAIN field is:
PROCESSING RATE Field
The field indicates the multiple of the loop processing rate at which the controller
algorithm is executed. If the default (1) is used, the FCM is processed each time the
loop is processed. If the field is changed to 2, the FCM is processed every second
time the loop is processed. Valid entry is an integer multiple of the loop processing
rate specified on the Loop Definition Templet. For example, if the value of this field
is 3 and the loop processing rate is 4 seconds, the controller algorithm is processed
every 12 seconds.
BASE GAIN Field
This field specifies the gain (proportional response) in a fixed gain controller. If no
adaptive functions are turned on, the base gain is the active gain of the FCM, and the
FCM operates as a fixed gain controller. When an adaptive gain function is turned
on, all changes in active gain due to the algorithm for that function are based on the
base gain. Valid entry is a decimal number.
3BUR002418-600 A
GAIN fill in an Adaptive Gain Templet
RESET fill in an Adaptive Reset Templet
BOTH fill in an Adaptive Gain and an Adaptive Reset Templet
NONE no Adaptive Templets are needed
PID Controller FCM
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