Hitachi USBWL11N Datasheet download pdf (Page 64)

Command Format

Command formats differ among the different communication ports.

● TCP #23

You can use the RS-232C commands without any changes. The reply data

format is the same as the RS-232C commands. (

&RS-232C Communication

in the Operating Guide - Technical)

However, the following reply will be sent back in the event of authentication

failure when authentication is enabled.

Header Data length RS-232Ccommand Check Sum

Connection

0x02 0x0D 13 bytes 1 byte 1 byte

Reply Error code

0x1F 0x04 0x00

Header → 0x02, Fixed

Data length → RS-232C commands byte length (0x0D, Fixed)

RS-232C command → RS-232C commands that start with 0xBE 0xEF

(13 bytes)

Check Sum → This is the value to make zero on the addition of the

lower 8 bits from the header to the checksum.

Connection ID → Random value from 0 to 255 (This value is attached

to the reply data)

● TCP #9715

Send Data format

The following formatting is added to the header (0 x 02), Data length (0 x 0D),

Checksum (1 byte) and Connection ID (1 byte) of the RS-232C commands.

7. Other Functions

7.4 Command Control via the Network (continued)

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Hitachi USBWL11N Datasheet Page 64