Watlow CPC400 - Manual (Page 66)

Chapter 3: Operation and Setup CPC400 Series User’s Guide
52 Watlow Anafaze Doc. 0600-2900-2000
Table 3.2 describes the alarm codes and messages for pro-
cess alarms and failed sensor alarms.
Table 3.2 Alarm Codes and Messages for
Process and Failed Sensor Alarms
For details about the condition that causes each alarm, see
Setting Up Alarms on page 63.
How to Acknowledge an Alarm
To acknowledge a process alarm or failed sensor alarm,
press x. If there are other loops with alarm conditions, the
alarm display switches to the next loop that has an alarm.
Acknowledge all alarms to clear the global alarm digital
output.
The keypad and display will not work for anything else un-
til you acknowledge each alarm. The alarm code or mes-
sage persists as long as the alarm condition exists.
System Alarm Messages
If a system alarm occurs, the alarm message replaces the
entire display. The message persists until the condition is
corrected.
Table 3.3 describes system alarm messages. For more in-
formation, see the Troubleshooting and Reconfiguring
chapter.
Alarm
Code
Alarm
Message
Description
AH (No message) Alarm high. See Alarm High and Alarm Low on page 66.
AL (No message) Alarm low. See Alarm High and Alarm Low on page 66.
HD (No message) High deviation alarm. See Deviation Alarms on page 66.
LD (No message) Low deviation alarm. See Deviation Alarms on page 66.
TO T/C open Thermocouple open. See Thermocouple Open Alarm on page 64.
TR T/C reversed
Thermocouple reversed. See Thermocouple Reversed Alarm on
page 64.
TS T/C shorted Thermocouple shorted. See Thermocouple Short Alarm on page 64.
RO RTD open RTD open. See RTD Open or RTD Shorted Alarm on page 65.
RS RTD shorted RTD shorted. See RTD Open or RTD Shorted Alarm on page 65.
AW (No message)
Ambient Warning. Controller's ambient temperature has exceeded
operating limits by less than 5°C