Hanna Instruments HI 23 Series, Инструкция по эксплуатации, Страница: 48 / 60

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• Using the arrow keys, set the
controller address. To exit setup,
press CFM key and then LCD key.
Note
In an RS 485 network, each device must have a different
address.
• Select the desired baud rate with the up and down keys
and press the CFM key to store the new settings. Available
baud rates are: 1200, 2400, 4800 and 9600 Bps.
The PC software to communicate with the controllers is
HI92500. Please refer to this product specifications for fur-
ther informations.
RS485 PROTOCOL
The commands sent to the controller must have the follow-
ing format:
• 2-digit process ID number
• 3-character command name
• Parameters (variable length, may be null)
• End of command (always the CR character, Hex 0D)
A maximum time interval of 20 ms is allowed between two
consecutive characters of a command. It is possible to send
commands to change the controller settings or to simply
ask information on the controller status. Following is the
complete list of commands available:
Command Command Command Command Command Parameter Parameter Parameter Parameter Parameter Description Description Description Description Description
CAR null Request calibration data
GET NN Request setup item NN
K01 null Same as CFM+CAL keys
K02 null Same as LCD+CAL+SETUP keys
KCD null Same as CAL DATA key
KCF null Same as CFM key
KCL null Same as CAL key