Watlow MINICHEF 2000 - Manual (Page 56)

D e f i n i t i o n s o f Te m p e r a t u r e A l a r m s
H a r d w a r e & S o f t w a r e S e t u p G u i d e Wa t l o w M I N I C H E F 2 0 0 0 ■ 5 5
Definitions of Temperature Alarms
If there is a problem during operation, an alarm message will appear on the main dis-
play. Alarm messages are self clearing. They will go away when the condition causing
the alarm goes away.
Only one alarm will be displayed at a time. The alarm with the highest priority will be
the one displayed. The priority is as follows starting with the highest: channel 1 pro-
cess, channel 1 high deviation, channel 1 low deviation, channel 2 process, channel 2
high deviation, channel 2 low deviation.
When displaying alarms, an alarm message will alternate with the normal display.
Alarms will only be displayed in the operational mode. The outputs of the control will
not be affected in any way by an alarm.
Process alarm [PrOC1] (channel 1), [PrOC2] (channel 2)
A process alarm occurs when the measured temperature of a channel exceeds the pro-
cess alarm parameter value. The measured temperature includes any offsets pro-
grammed in the control parameters.
Low deviation alarm [`LO`1] (channel 1), [`LO`2] (channel 2)
A low deviation alarm occurs when the measured temperature of a channel drops below
the current setpoint minus the low deviation parameter value. The measured tempera-
ture includes any offsets programmed in the control parameters.
High deviation alarm [`Hi`1] (channel 1), [`Hi`2] (channel 2)
A high deviation alarm occurs when the measured temperature of a channel rises above
the current setpoint plus the high deviation parameter value. The measured tempera-
ture includes any offsets programmed in the control parameters.
Note: See the Troubleshooting Chart in this Appendix for probable causes and possible solutions to alarm situations.