124 | Managing the Radio
Aprisa SR+ User Manual 1.11.1
Sleep Mode
The Sleep Mode parameter sets how sleep mode is controlled. The default setting is Automatic.
Option
Function
Automatic
If this radio is a remote, it uses the setting from the base station.
If this radio is the base station, the external triggers control the
radio sleep mode state.
Standard
The external triggers control the radio sleep mode state.
ABB Totalflow ®
The external trigger wakes up the radio for up to the maximum
duration set in the ‘Awake Duration’ or indefinitely if data is sent
to the RTU.
Awake Duration for ABB Totalflow ®
The Awake Duration sets the radio awake duration when there is no data being sent to the RTU.
Triggers
The triggers when enabled cause the radio to sleep or wake up. For the radio to sleep, all the enabled
triggers must be OFF i.e. if only one enabled trigger goes ON, the radio will wake up.
Serial Port 1 / 2 DTR Trigger
The Serial Port 1 / 2 DTR Trigger controls the radio sleep and wake up. The default setting is Disabled.
Option
Function
Disabled
The Serial Port DTR has no effect on sleep mode.
Active Low (sleep when
input is low)
The Serial Port DTR ON state causes the radio to wake up and the
DTR OFF state allows the radio to sleep.
Note: There must be valid RS-232 signals on either the RTS or RX
lines for the radio to go to sleep (when DTR is ON).
The RS-232 specification defines valid control states as:
•
ON state or 0-state (SPACE) condition = +3 to +12 volts
•
OFF state or 1-state (MARK) condition = -3 to -12 volts
Alarm Input 1 Trigger
The Alarm Input 1 Trigger controls the radio sleep and wake up. The default setting is Disabled.
Option
Function
Disabled
The Alarm Input 1 has no effect on sleep mode.
Active Low(sleep when
input is low)
The Alarm Input 1 high (ON) state causes the radio to wake up and
the low (OFF) state allows the radio to sleep (see ‘
’ on
page 485 for alarm input specification).
Note: If the alarm input is disconnected (e.g. alarm cable
unplugged), the radio will go to sleep.
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