Baud Rate And Checksum - Advantech ADAM 4000 Series User Manual

2
Chapter

2.3 Baud rate and Checksum

Adam modules contain EEPROMs to store configuration information and
calibration constants. The EEPROM replaces the usual array of switches
and pots required to specify baud rate, input/output range etc. All of the
ADAM modules can be configured remotely through their communication
ports, without having to physically alter pot or switch settings.
Since there is no visual indication of a module's configuration status, it is
impossible just by looking at it what the baud rate, address and other
settings are. It might not be possible to establish communications with a
module whose baud rate and address are unknown. To overcome this
problem, every module has an input terminal labeled INIT*. By booting
the module while connecting the INIT* terminal with the module's GND
terminal, the modules configuration is forced into a known state. This state
is called the INIT* state.
INIT* state defaults:
Baud rate: 9600
Address: 00h
Checksum: disabled
Forcing the module in the INIT* state does not change any parameters in
the module's EEPROM. When the module is in the INIT* state with its
INIT* and GND terminals shorted, all configuration settings can be
changed and the module will respond to all other commands normally.
Chapter 2 Installation Guideline 2-9