Input Limiter Fcm; User Calculations Fcm - ABB 800xA Operation

Appendix A Runtime Templates

Input Limiter FCM

The Input Limiter FCM defines analog input high and low limits. When the input
exceeds the high or low limit, the input value is clamped at the specified limit and a
flag is set. The input remains clamped as long as it exceeds the limit. The flag
remains set until the input crosses a configured deadband (below the high limit or
above the low limit). Even after the input returns within the boundaries of the high
and low limits and is no longer clamped, the flag remains set until the input crosses
the deadband. This prevents the flag from being continuously set and reset if the
input oscillates around one of the limits.
HI LIMIT Field
This field specifies the value of the high limit. Valid entry is any number greater
than the value of the low limit
LO LIMIT Field
This field specifies the value of the low limit. Valid entry is any number less than the
value of the high limit.
ENABLE HIGH LIMIT Field
This field specifies whether the high limit is enabled. Valid entries are:
ENABLE LOW LIMIT Field
This field specifies whether the low limit is enabled. Valid entries are:

User Calculations FCM

The User Calculations (UCAL) feature allows you to add user-defined algorithms to
CCF processing. This feature requires two main steps:
3BUR002418-600 A
NO high limit is disabled
YES high limit is enabled
NO low limit is disabled
YES low limit is enabled.
Input Limiter FCM
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