ABB Ability 800xA Series, Operation

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Appendix A Runtime Templates Loop Definition Templet
3BUR002418-600 A 219
LOLO LIMIT Field
This field defines the low low alarm limit for the measured variable. The alarm
becomes active when the measured variable becomes equal to or less than the low
low limit and clears when the measured variable increase to the value of the low low
limit plus the alarm deadband. Valid entry is: a decimal number.
LOLO ALARM PRIORITY Field
This field specifies the priority level for the low low alarm. Valid entries are: STD
(standard priority), MED (medium priority), HIGH (high priority).
UNIT ID Field
This field assigns the loop to a unit. This is useful for systems that use the History
software. The alarm/event history messages for all loops in a unit are collected and
stored in the same file. If a unit assignment is not made for a loop, the History
Services software stores alarm/event history messages for the loop in a default unit
file. Valid entry is: the name of a unit as defined in the TEMPLET NAME field on
the Unit Master Templet for the unit.
COMP MODE RESTRICT Field
COMP MODE (computer mode) is used to specify how certain PID or an AM
controller loop parameters are handled. During configuration of the Loop Definition
Templet, you can set loop control to either restricted or not restricted. There are two
entries for this field. They are: NO (No restrictions on control of the protected
attributes. The computer mode feature is used.), YES (Control of the protected
attributes is restricted to either the operator or the computer. Computer control
indicates that a TCL program or a program running on a VAX™, IBM PC™ or
MODCOMP computer attached to the MOD 300 control system, is manipulating
PID or AM parameters.)
ABNORMAL STATE Field
This field specifies whether the system should check the loop for an abnormal
condition. An abnormal condition for a continuous loop is caused by any one of the
following conditions: