Emerson Process Management ControlWave EFM 3808 - Manual (Page 218)

F-18 / Appendix F CI-ControlWave EFM
F.5.7.1 Radio Control Mode
Enable/Disable Radio Control via a control button to the right of Radio Control Mode.
F.5.7.2 Common Properties
Local Address
Local Address of the ControlWave EFM is set via the RTU Configuration Parameters
Page in NETVIEW or LOCAL VIEW.
Group Number
Group Address of the ControlWave EFM. This is set via the RTU Con-figuration
Parameters Page in NETVIEW or LOCAL VIEW.
Activate Radio on Local Port Active
When using any of the radio port scheduling modes (Radio Sensing, Hourly, Daily or
Daylight) Port 2 (the Radio Port) is inactive unless communications are scheduled.
However, by enabling the Activate Radio on Local Port Active mode, Port 1 (the Local Port)
can be used to control the state of Port 2. By plugging a cable into Port 1, Port 2 will
automatically be activated.
F.5.7.3 Radio Sensing Mode
Radio sensing allows a user to activate the radio for very short time intervals (specified in
milliseconds under Listen Time Out) every so many milliseconds (specified in seconds
under Listen Interval) to 'sense' a valid BSAP message on the radio's carrier frequency. If a
message is not detected, the radio is deactivated. If a message is detected, the radio is left
activated until it responds, after which it remains ON for another listen time interval. If no
more valid messages are detected, the radio returns to 'sense' mode. This mode allows the
system to use as little energy as possible to detect traffic throughout the day. Energy usage
depends on the activation time and activation rate (INTERVAL). Assuming a 1 watt radio
then a 200 millisecond listening period every 5 seconds is equivalent to .04 watts. Users can
configure the Interval and Rate (Listening period) to suit their energy needs. Radio Sensing
occurs between the START HOUR and END HOUR specified by the operator.
F.5.7.4 Hourly Mode
Start Time Offset Into Hour Seconds
Start Time Offset Into Hour Seconds specifies a user supplied offset which is used when
computing the radio On Time. Start Time Offset is a factor used to calculate the On Time.
Poll Time Per Node Seconds
Poll Time Per Node Seconds sets the duration of time (seconds) allocated for com-
munications per node. Poll Time Per Node time is also used to calculate the On Time.
Poll Time Per Group Seconds
Poll Time Per Group Seconds sets the duration of time (seconds) allocated for com-
munications per group. Poll Time Per Group time is also used to calculate the On Time.
Listen Time Seconds
Listen Time Seconds is the amount of time (in seconds) that the radio will be enabled for (at
the scheduled time, i.e., the enabled time before it will shut off due to the lack of com-
munications.