Watlow CLS - Manual (Page 64)

56 CLS User’s Guide
Using the CLS
Alarms
If an alarm occurs, a two-character alarm code appears in the lower left
corner of the display (below). If a Failed Sensor alarm occurs, the
controller also displays a short alarm message.
These alarm codes and messages are shown in the table below.
Acknowledging an Alarm
Press Alarm Ack to acknowledge the alarm. If there are other loops with
alarm conditions, the Alarm display switches to the next loop in alarm.
Acknowledge all alarms to clear the global alarm digital output. (You
must acknowledge each alarm before displays and keyboard operation
will resume.)
NOTE
In the 4 and 8 CLS, the controller cannot detect all RTD open
and RTD short failures. Detection of open or shorted RTDs
depends on which wires are open or shorted.
Symbol Alarm Message Alarm Type
FS TC Break Thermocouple break
FS (RO) RTD Open RTD break
FS (RS) RTD Short RTD Short
HP No message High process alarm
HD No message High deviation alarm
LD No message Low deviation alarm
LP No message Low process alarm
LOOP PROCESS UNITS
ALARM SETPOINT STATUS OUT%
02 180 º
F
LP 180 AUTO 0
Engineering Units
Output Percentage
Setpoint
Alarm Symbols
Loop number
or Name
Process Variable