Hanna Instruments HI 23 Series Instruction Manual page 48

Note
RS485 PROTOCOL
48
• Using the arrow keys, set the
controller address. To exit setup,
press CFM key and then LCD key.
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.
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 Parameter Parameter
Command Command Command Parameter Parameter Parameter
CAR null
GET NN
K01 null
K02 null
KCD null
KCF null
KCL null
Description Description
Description Description Description
Request calibration data
Request setup item NN
Same as CFM+CAL keys
Same as LCD+CAL+SETUP keys
Same as CAL DATA key
Same as CFM key
Same as CAL key