Measurement Computing CB-COM-7021 - Manual (Page 68)

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CB-7021, CB-7022, CB-7024 User’s Manual
3. Application Note
3.1 INIT* pin Operation
Each CB-7000 module has a build-in EEPROM to store
configuration information such as address, type, baud rate and other
information. Sometimes, a user may forget the configuration of the
module. Therefore, the CB-7000 have a special mode named “INIT
mode
”, to help user to resolve this problem. The “INIT mode” is
setting as Address=00, baud rate=9600bps, no checksum.
To enable INIT mode, please follow these steps:
Step 1. Power-down the module.
Step 2. Connect the INIT* pin with the GND pin.
Step 3. Power-up the module.
Step 4. Send command $002(cr) in 9600 bps to read the con-
figuration stored in the module’s EEPROM.
Refer to “7000 Bus Converter User Manual” Sec. 5.1
and “Getting Started” for more information.
3.2 Module Status
Power-On Reset
or Module Watchdog Reset will put all
outputs to the PowerOn Value. The module can accept the host’s
command to change the output value.
Host Watchdog Timeout
puts all outputs to the Safe Value.
The host watchdog timeout flag is set, and an output command will
be ignored. The module’s LED will flash. The user must reset the
Module Status via command to go to normal operation.