User's Manual

105 Radio/Serial Telemetry Module User Manual
Page 56 © March 2000
• The pulse rate scaling for PIN1 has been set to 5 Hz to match the maximum flow rate of the flow
meter. Note that PIN1 has not been configured for "divide by 10" (for 1000 Hz pulse signals).
• AIN1 (the level transducer) is mapped to Out1 at #97 via #1. The analogue debounce has been
set to 2 sec. This is to avoid any wave action on the surface of the tank causing un-necessary
change transmissions. This debounce time will also operate on the PLSR1 value, but as the flow
rate changes slowly, this will not affect the performance of this signal.
• SETPT1 (the set-point status for AI1) is mapped to Out2 (DO2) of #1 (pump station). The set-
point values for SETPT1 have been set to 40% and 75%. When the tank level drops to 40%,
DO2 at the pump station will activate to start the pump. When the level rises above 75%, DO2
will reset to stop the pump.
• The update time for SETPT1 has been changed to 5 minute, as required.
• An additional mapping has been entered - LOW VOLT has been mapped to Out7 at #96 via
#1 (DO7 at the control station). This mapping is for future use - it will provide a low battery
voltage alarm for the tank station. The update time for this mapping has been set to the maximum
time of 15 minutes to reduce loading of the radio channel.
• A Start-up poll has been configured for #1, as DO1 at the tank station is controlled from the
pump station. Note that no comms fail reset time has been configured for DO1. As this output
drives an indication only, the indication will show the last correct status even during
communication failures.
Pump Station Configuration
The 105U-1 module has the following configuration :-