Configuration software
4.5.5 Setpoints
Lets you generate a digital on/off value from the value of an analog signal. All
setpoints operate as ‘Low’ alarms.
Low alarms have two setpoint values - a high threshold value and a low threshold
value. When the analog level moves below the low value, the setpoint status turns on.
It will only reset if the high value is exceeded. This prevents chatter around the
setpoint value.
The analog input and the thermocouple input setpoints allow selection between ten
different threshold pairs using the rotary switch on the front panel. Select the ‘Single’
tab to make all ten pairs the same.
There are three types of setpoint
Setpoint Type
Description
Analog setpoint
This setpoint is associated with the 4-20 mA analog input.
Thermocouple
setpoint
This setpoint is associated with the thermocouple input and can
also be configured to read millivolt values.
Temperature
setpoint
This setpoint is associated with the module’s internal
temperature measurement.
This setpoint is associated with the module’s supply voltage
monitoring.
Supply voltage low
By changing the Units setting, the values of high and low thresholds can be displayed
in different formats.
Data
Format
Description
Raw - data
format.
For 4-20mA signals, 16384 corresponds to 4mA, or 0% reading, and
49152 corresponds to 20mA or 100% reading.
For millivolt measurement, 16384 corresponds to 0mV, or 0% reading;
49152 corresponds to 100mV or 100% reading
For temperature measurement, 16384 corresponds to the bottom of the
thermocouple range; 49152 corresponds to the top of the thermocouple
range.
mA
Actual milliamp value for a 4-20 mA input.
%
Percentage of full scale. 4mA is 0%; 20mA is 100%
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