Instruction Manual

Controlling Multi-drop Link Mode

4-5

4-2

Multi-drop Link Mode Data Communication

Multi-drop link mode allows code or tag information to be sent to the host computer via either

"auto-polling" or "manual polling".

The options are each explained below.

This is generally set to "auto-polling".

Auto-polling

About auto-polling

Auto-polling allows the BL/SR/RF Series devices connected to an N-410 and assigned an ID

number to be continuously polled by the N-410 (using those ID numbers) at startup. The N-410

then continuously sends read data to the host computer.

The load on the host computer program is extremely low because the N-410 handles all of the

data queries automatically.

Communication format

When using auto-polling, data is sent to the host computer from the N-410 in the following format.

• mm=01 to 31: The BL/SR/RF Series device ID number

• nnnn = the number of characters in the data (4 ASCII characters)

* the total of character count for the data is part 1 + part 2.

• (Data) = Data obtained

ERROR : BL/SR/RF Series device unable to obtain data.

OVER : A buffer overflow has occurred.

• Choose from the following for the header and delimiter. The options are not limited to those listed

below (up to five characters).

Header: , , None

Delimiter: , ,

N-410

The BL series

device with ID

number 3 read the

barcode "ABC123."

Header % P 03

ABC1230010 Delimiter

% P mm -Header Delimiter(Data)

ID addition

(1) (2)

nnnn

ESC

STX

ETX