User's Manual

905U-K.MAN Rev. 1.1 January 2002
 ELPRO Technologies Pty Ltd Page 13
Overview:
• Measurements of the analogue signal are determined by the sample time and warm-up time
• Analogue value is transmitted if the measured value has increased by the configured
sensitivity amount since the last transmission
• Analogue value is transmitted if the input value has not been transmitted within the update
time (10 seconds - 5 days)
2.3.4 Setpoint Status
The setpoint status is an internal status value, calculated by comparing the analogue input to
two configurable setpoint values. The setpoint status turns ON when the analogue input
moves below the low setpoint value, and turns OFF when it moves above the high setpoint
value. The high setpoint percentage must always be greater than, or equal to, the low set
point.
The internal setpoint status will be determined every time an analogue measurement is taken.
The setpoint status is treated as a digital signal and its value is transmitted according to the
rules for a digital input.
2.3.5 Low Battery Voltage Alarm
The Low Battery Voltage Alarm is a configurable set point determined by the type of battery
used to power the 905U-K. If the voltage of battery supply falls below the set point voltage,
the internal battery voltage alarm will turn on.