model 2704 controller installation and operation handbook - Soliton

2704 Controller Alarm Operation
7.7. ALARM ACKNOWLEDGEMENT
A new alarm can be acknowledged in four ways:
1. By pressing and simultaneously
2. From an external source, such as a pushbutton, connected to a suitably configured digital
input
3. Through digital communications
The message will remain on the screen and the alarm symbol, , will continue to flash until
the alarm is acknowledged - you are prompted to do this by pressing and
simultaneously. The symbol will stop flashing and remain illuminated until all alarm
conditions are removed. If a further alarm occurs the symbol will start flashing again and a
new alarm message will pop up.
The message displayed indicates the source of the alarm and may be customised to the users
terminology. The source will inherit the name of the channel or the loop or the user alarm
name.
The operation of the alarm acknowledgement depends whether the alarm is non-latching or
latching, auto or manual reset. This is shown in the following tables:-
Non Latched Alarms
Alarm
Condition
Acknowledge Symbol Message Ext relay
(if fitted)
ON No Flashing Alarm message On
Off No Off Former display Off
Alarm
Condition
Acknowledge Symbol Alarm message Ext relay
(if fitted)
ON No Flashing Alarm message On
On Yes Steady Former display Off
Off Off Former message Off
Latched Alarm - Auto
Alarm
Condition
Acknowledge Symbol Message Ext relay
(if fitted)
ON No Flashing Alarm message On
Off No Flashing Alarm message On
Off
Yes
Alarm
Condition
Acknowledge Symbol Message Ext relay
(if fitted)
ON No Flashing Alarm message On
ON Yes Steady °:Access Level Off
Off - Off Normal display Off
Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00 7-15