A. Appendix
A.1 INIT Mode
Each DGW-521 has a built-in EEPROM to store configuration
information such as module address, type code, Baud Rate, etc.
Occasionally, the configuration of a module may be forgotten
and there are no visual indications of the configuration of the
module. It is difficult to communicate with the module when
the configuration of the module is unknown. To help avoid this
problem, the DGW-521 has a special mode called “INIT
mode”. When the module is powered on in “INIT mode” the
configuration of the module is reset as follows, allowing it to be
operated as normal.
1.
Address: 00
2.
Baud Rate: 9600 bps
3.
No checksum
4.
Protocol: DCON
The configuration information stored in the EEPROM is not
changed and they can be read by sending the $002(CR)
command at 9600bps.
There are commands that require the module to be in INIT
mode. They are:
1.
%AANNTTCCFF when changing Baud Rate and checksum
settings.
2.
$AAPN
DGW-521 User Manual, Rev. A1.0
34
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