Hanna-instruments HI 23 Manual de usuario descargar pdf (Pagina 25)

4948

KDS null Same as LCD key

KDW null Same as key

KRG null Same as key

KST null Same as SETUP key

KUP null Same as key

MDR null Request firmware code

ECR null Request EC reading (available in control or

idle mode only)

TDR null Request TDS reading (available in control

or idle mode only, for HI 24 series only)

RNG null Request measure Range (available in

control or idle mode only)

TMR null Request temperature reading

PWD NNNN Send the 4-digit password

SET NNPC

Set setup item NN to the PC

value;

P=+ if the value is greater than 0, P=- if the value is less

than 0. C

can be 0 or 1; only C

can be 0 to 9 or blank

(the command is not available if the controller is in setup

mode)

Note If the controller is not in control or idle mode and the tem-

perature reading is requested through the TMR command,

the controller answers with the last acquired reading when

it was in control or idle mode.

Following are examples of commands for setup items:

“03SET22+01200<CR>”

This command sets the setup item 22 (relay 2 set point) of a

EC controller, identified by the process ID number 03, to the

+12.00 mS value.

• 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 Parameter 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

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