Digital Outputs; Pulsed Outputs; Analog Inputs - Elpro Technologies 915U-2 User Manual

Page 52 915U-2 Wireless I/O

Digital Outputs

Name – The inputs can be named to help with configuration or use the default, up to 30
characters including spaces.
Failsafe Time (sec) – The Fail Safe Time is the time the output needs to count down
before activating the failsafe state. Receiving an update or a COS message will reset
the Fail Safe Timer back to its starting value. If the Fail Safe Timer gets down to zero
then the output will be set to the Fail Safe state (ON or OFF)
It is recommend this Fail Safe Time be configured for a little more than twice the update
time of the input that is mapped to it, that way the output will reset if it fails to receive
two update messages.
Fail Safe State – The state that the output will go to after the 'Failsafe Time' has
elapsed.
If the Failsafe state is enabled (ON) this will indicate with the LED flashing briefly OFF
and the digital output will turn on.
If the Failsafe state is disabled (OFF) this will indicate with the LED flashing briefly ON
and the digital output will turn off.

Pulsed Outputs

Name – The inputs can be named to help with configuration or use the default, up to 30
characters including spaces.
Update Time (sec) – Time that the output will be updated with the latest received value.
The time is related to the update time of the pulsed input that is mapped to it. E.g. If the
pulsed input update time is configured for 10 seconds the number of pulses will be
counted and send to the receiving module every 10 seconds. The receiving module will
then output the pulse count over the configured update time, i.e.10 seconds

Analog Inputs

The 915U-2 Analog inputs have the following configuration parameters.
Name – The inputs can be named to help with configuration or use the default, up to 30
characters including spaces.
Filter (sec) – The Filter time Constant is the time the analog takes to settle on a step
changed of an analog value. By default, all the inputs except the Pulse Rates have a
Time constant of 5 seconds. Pulsed input rates are not filtered.
Lower & Upper Setpoints – Are the upper and lower control point values that will be
used to turn on and off the Analog Setpoint digital signals located at register 10009 –
10020.
Setpoint values are entered in the scale of the input, i.e. Analog input 1-4 will be in mA,
Analog inputs 9-12 will be volts, etc.
The analogs inputs are controlled by using the setpoints and the two control options
explained below. All analogs have these controlling setpoints and options.
The two main Setpoint control options are.
Page 52 User Manual