Dead Time Compensation Fcm; Timer Fcm; Counter Fcm - ABB 800xA Operation

Appendix A Runtime Templates

Dead Time Compensation FCM

When the process contains a dead time which threatens control loop stability, the
Dead Time Compensation FCM provides a compensated process signal to the loop
controller.
MAX DEAD TIME Field
This field specifies the value of the deadtime time interval. Valid entry is a number
in seconds (the data base holds this number internally in milliseconds).
LAG TIME Field
This field specifies the value of the lag time. Valid entry is a number in minutes.
PREACT TIME Field
This field specifies the value of Pre-act time. Valid entry is a number in minutes.
PREACT GAIN Field
This field specifies the value of Pre-act gain. Valid entry is any number.

Timer FCM

The Timer FCM provides for triggering an action after a specified elapsed time or at
a specified time of day. Both single shot and periodic timing are supported.
PERIODIC TIME Field
This field specifies period length. It is used by each type of timer configured for this
FCM. Valid entries are in the format:

Counter FCM

This is a basic timer whose result is either in seconds or a specified time interval.
The Counter FCM has two inputs. One resets the count, the other enables or disables
3BUR002418-600 A
hh:mm:ss time in terms of hour, minute, and second (the data base holds the
number internally in seconds)
Dead Time Compensation FCM
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