M7 GX Technical Manual
38
Raveon Technologies Corp.
TRIGBITS 1
(enables bit 0)
TRIGEX 1
(configures bit 0 for exception reporting)
To configure all bits to be used to report when they change, issue these
commands:
TRIGBITS 7
(enables bit 0, 1 and 2)
TRIGEX 7
(configures bit 0, 1, and 2 for exception reporting)
To configure bit 0 to be used to report when it changes, bit 1 to cause a report
when it goes low, and disable bit 2, use these commands.
TRIGBITS 3
(enables bit 0 and 1, disable 2)
TRIGEX 1
(configures bit 0 for exception reporting)
TRIGPOL 2
(configures bit 1 for active-low reporting)
When a digital input triggers a transmission, the transmission will not occur
immediately. It will occur when the M7 GX is supposed to report in at the rate
programmed into its
TXRATE
parameter. For example, if the
TXRATE
is set to 2
seconds, the unit will transmit every 2 seconds when an input is triggered. If an
input is not triggered, the unit will not transmit its position/status (as long as no
other event such as speeding or proximity triggered a transmission).
When no inputs are triggering a transmission and no other events are causing the
unit to want to transmit, the RV-M7 GX will report in at is
IDLERATE
period. For
example if
TXRATE
is
2
and
IDLERATE
is
300
, then the unit will report in every 2
seconds when an input trigger occurs, but will only report in every 5 minutes when
input triggers are not happening.
Important:
If
TRIGDX
is
0
, the
RV-M7 GX
will always report at the TXRATE
setting. The digital inputs will be ignored, although their status is always sent over
the air.
TRIGDX
is the minimum distance the RV-M7 GX must move to trigger a
transmission. When 0, it always must report. Set
TRIGDX
to some number of
meters to ensure the digital inputs are checked.
6.6.
Data Transmission
To transmit data, send one or more bytes of data into the serial port of the modem.
When a full packet of data has been collected into the internal buffer of the modem,
or when there is a pause in the data, the modem will automatically key its
transmitter, and send the data over the air.
GPS mode 1 and GPS mode 4 do not support data transmission. GPS mode 1
does receive serial-port data not because it is a transmit-only mode. It will
transmit, but it will not receive data over the air. GPS mode 4 will receive data and
it will transmit position and status, but it will not transmit serial data entered into the
serial port. Serial port transmit data is disbled because GPS mode 4 is normally
used to connect the a hand-held or mobile GPS display to the RV-M7. The RV-M7
will send $GPWPL messages to the GPS to display the location of other StinRay
