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4. Advanced Programming
Automatic DIP Switch Configurations
Each time an RF Modem is powered on, intelligence inside the modem sends AT Commands that
program the modem according to the positions of the DIP switch. DIP switch configurations are
sent automatically during the power-on sequence and affect modem parameter values as shown
in the table below.
Figure 4.1. DIP Switch
Table 4.1. Power‐up Options ‐ Commands sent as result of DIP Switch Settings
(SW = DIP Switch)
Switches
Condition
If SW1 & SW2
are ON (up)
Switches 1 & 2
(Restore Defaults /
If SW1 is ON (up)
Serial Interfacing)
If SW1 is OFF (down)
If SW5 & SW6 are
OFF (down)
If SW5 is OFF (down) &
SW6 is ON (up)
Switches 5 & 6
(TX/RX Modes)
If SW5 is ON (up) &
SW6 is OFF (down)
If SW5 is ON (up) &
SW6 is ON (up)
IMPORTANT: To avoid overwriting previously stored custom configurations (due to the automatic
configurations that take place each time the RF modem is powered-on), it is necessary to disable a
processor located inside the RF modem. To disable the processor, keep switches 5 & 6 ON (up) as
indicated is in the table.
RS‐232/485 RF Modem Product Manual – MAN0782‐02
Behavior
Restore Defaults
RS-232 Operation
RS-485 or
RS-422 Operation
Multipoint Base
Multipoint Remote
Point-to-Point
Processor is disabled and AT Commands are not sent to the RF Modem
Commands Sent During Power-up
ATRE
(Restore Defaults)
ATWR
(Write defaults to non-volatile memory)
ATCS 0
(CTS function for CTS line)
ATCS 3
(RS-485 or RS-422 Operation)
ATMY 0
(Source Address)
ATDT 0xFFFF
(Destination Address)
ATMT 3
(Multi-Transmit option)
ATAM
(Auto-set MY, MY = unique)
ATDT 0
(Destination Address)
ATMT 0
(Multi-Transmit option)
ATRR 0x0A
(Retries)
ATAM
(Auto-set MY, MY = unique)
ATDT 0xFFFF
(Destination Address)
ATMT 3
(Multi-Transmit option)
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