model 2704 controller installation and operation handbook - Soliton

Alarm Operation
2704 Controller
7.4.2. Latched Alarm (Full Scale High) With Manual Reset
Acknowledging here will not
reset the alarm because it is still
in an alarm condition
Manual Reset
The alarm must first clear
before it can be reset.
Alarm ON
↑
MV
Alarm OFF
Alarm
setpoint
↓
Hysteresis
↑
Time
→
Alarm Acknowledged
7.4.3. Grouped Alarms
Alarms can be associated with different aspects of the process. They are grouped in
accordance with the functions they perform as follows:
Loop Alarms
PV Input Alarms
Analogue Input
Alarms
Module Alarms
User Alarms
Alarms associated with each control loop. Examples are: High,
Low, Deviation and Rate of Change. Two alarms are available for
each loop. On a new controller these are the only alarms which are
configured - those listed below must be enabled in configuration
level, see Engineering Handbook HA026761.
Alarms which operate on the PV input. Examples are: High and
Low. Two alarms are available with this input.
Alarms which operate on the analogue input. Examples are: High
and Low. Two alarms are available with this input.
Alarms which operate on each plug in module. These can be input
or output alarms depending upon the function of the module fitted.
These alarms are associated with modules 1, 3, 4, 5, & 6, since
module 2 is reserved as a an extra memory module
Eight undedicated alarms which can be wired to any variable.
7-10 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00