Measurement-computing CB-COM-7021 Manual do Utilizador descarregar pdf (Página 68)

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.

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Measurement-computing CB-COM-7021 Manual do Utilizador Página 68