Marathon Computer UNIPRO V3.5 - Manual (Page 161)

MMI Product Documentation
Unipro 3.5 Process Control 1 Aug. 1997
Used, in conjunction with the Programmer, for the
following purpose:
81 TURN ON A TEMPERATURE
DEVIATION BAND ALARM
(COMMUNICATING TEMPERATURE
CONTROLLER REQUIRED)
80
TURN OFF SAME
The A(Alarm) OPCODE in this case should be followed by the
L(Limit) OPCODE that sets the width of the particular
deviation band
(i.e. +10`,+25` or +12%C, etc.). If no LIMIT statement is used,
the previous deviation value will be used. Both the turn ON
and turn OFF statements can set the deviation. The alarms are
said to be "smart" in the sense that they are not armed until
the process is actually at the required setpoint. If tripped, the
alarms produce the standard programmer ALARM display
and pulsing alarm. The program remains in HOLD until
action is taken.
Also, after the Deviation Alarm 81 occurs, clearing the alarm
also clears the inb and flag; therefore, the process must reach
setpoint before the alarm can sound again. The alarm is
automatically disarmed at the end of a program.
Message #82-90:
Not assigned.
Message #91:
Reserved
Message #92:
Indicates a problem on the Events Buss. This error may
occur at any point in a program that attempts to use events
statements.
One of the following conditions possibly exists:
a. The OPTOMUX board of interest
is not present, is disconnected, or is
turned off.