ABB 800xA Operation page 241

Appendix A Runtime Templates
The following equation is used to determine the critical value for a pulse duration
output:
where:
DO_RATE
H
When the critical value is zero, there is no adjustment for ineffective results. To
make an adjustment for ineffective results, the integral (reset) control action must be
turned on. Valid entry is a value, in engineering units, which must be greater than or
equal to 0 (zero)
INC LOWER DEADBAND Field
This field specifies the lower boundary of the deadband for the incremental PID
algorithm. Valid entry is a value, in engineering units, which must be less than or
equal to 0 (zero)
INC UPPER DEADBAND Field
This field specifies the upper boundary of the deadband for the incremental PID
algorithm. Valid entries are a value, in engineering units, which must be greater than
or equal to 0 (zero)
OUTPUT HIGH LIMIT Field
This field specifies the high limit for the output signal. It is used to limit the output
when the FCM is in the modes specified in the LIMITED OUTPUT MODES field.
It is also the alarm limit if the entry in the OUTPUT HIGH ALARMS? field is YES.
Valid entry is a number between -14.0 and 114.0%.
3BUR002418-600 A
CV = (100 x DO_RATE)
(H)
is the resolution in milliseconds for the pulse digital outputs (as
specified on the Controller or Multibus I/O Templet)
is the 100% (HI_COUNT) value for the pulse digital outputs
(as defined on the Pulse Duration Output Templet)
PID Controller FCM
241