Micromod MOD: Modcell 2050R Users Guide User Manual
Page 154
IB-23C650
BASIC OPERATION
Figure 16b. Controller Alarm Display and Relay Status Conditions (Sheet 2)
Alarm Ceases before
ACK
ALARM AND RELAY STATUS WITH ACKNOWLEDGMENT
Alarm Occurs
Alarm
Ceases
ACK’d
Alternating Process Variable
and Alarm Message, Flashing
LED, Relay De-energized
Normal Operation,
Relay Energized
ACK’d Alarm
still exists
Steady LED
Relay De-energized
Alternating Process Variable
and Alarm Message, Flashing
LED, Relay Energized
ALARM AND RELAY STATUS WITH ACKNOWLEDGMENT
AND LATCH
Alarm Occurs
Alarm Ceases before
ACK
Alarm
Ceases
ACK’d
Alternating Process Variable
and Alarm Message, Flashing
LED, Relay De-energized
Normal Operation,
Relay Energized
ACK’d Alarm
still exists
Steady LED
Relay Energized
Alternating Process Variable
and Alarm Message, Flashing
LED, Relay De-energized
S-1107-291A(1)
(Sheet 2 of 2)
148
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