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DR4300 Circular Chart Recorder
106 DR4300 Circular Chart Recorder Product Manual 12/03
4.3.15 Alarms Set Up Group
Introduction
If the recorder hardware supports outputs, one or both relays can be used for alarming. An alarm is an
indication that an event that you have selected during configuration (process variable, for example) has
exceeded one or more alarm limits. There are two alarms available for each pen (assuming no relay is
being used for control). Each alarm has two setpoints. There are two alarm output selections, high and low.
You can configure each setpoint to alarm either high or low. Each alarm has an adjustable hysteresis of 0.0
% to 100.0 % that is configurable for that alarm's setpoint.
If the “OUTALG” function in the control group is set to “RLYD”, both relays on the printed circuit
assembly for the pen being configured are used for control, and the prompts in the alarm group will not be
displayed. If “OUTALG” is “RLY”, or if the recorder is a limit controller, then Relay 1 is used for control.
In these cases only the prompts for the second alarm (Relay 2) will be displayed.
If “TIMER” is set to “ENAB”, then Relay 2 is used by the timer and prompts for the second alarm will not
be displayed.
Alarms group prompts
Table 4-13 lists all the function prompts in the alarms set up group and their definitions.
For a 2-pen recorder, the desired input channel is displayed on the left side of the operator interface.
Press FUNC
to select channel.
Press SETUP
key until “ALARMS” appears in the lower display.
Press FUNC
key to select the parameters.
Table 4-13 Alarm Parameter Definitions
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
A1S1TY*
NONE
[factory setting]
INP
DEV
ALARM 1 SETPOINT 1 TYPE—Select what you want
Setpoint 1 of Alarm 1 to represent.
NO ALARM
INPUT PV
DEVIATION
of input from setpoint
A1S2TY*
Same as A1S1TY
ALARM 1 SETPOINT 2 TYPE—Select what you want
Setpoint 2 of Alarm 1 to represent. The selections are the
same as A1S1TY.
*For Deviation Alarm to function: control must be enabled. If On/Off control is selected, only alarm #2 is available for Deviation.
A1S1VA
–999 to 9999
[factory setting = 100]
ALARM 1 SETPOINT 1 VALUE—This is the value at
which you want the alarm type chosen in prompt
"A1S1TY" to actuate. The appropriate value depends on
what the setpoint has been configured to represent.
A1S2VA
–999 to 9999
[factory setting = 100]
ALARM 1 SETPOINT 2 VALUE—This is the value at
which you want the alarm type chosen in prompt
"A1S2TY" to actuate. The appropriate value depends on
what the setpoint has been configured to represent.