Watlow MLS - Manual (Page 66)

54 MLS User’s Guide
Using the MLS
This table shows the symbols used in each form of the alarm display.
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
(The keyboard and display won't work for anything else until you
acknowledge each alarm). The alarm symbols are displayed as long as
the alarm condition is valid.
Bar Graph
Symbol
Single Loop
Symbol
Description
> HP High Process Alarm
> HD High Deviation Alarm
< LP Low Process Alarm
< LD Low Deviation Alarm
B T/C Break Open Input Error
S
O
RTD Short
RTD Open RTD Short Alarm
RTD Open Alarm
Aim Comm
Failure
Aim Fail MLS-AIM
Communications Failure