Hitachi CP-X8150 User Manual page 199

7. Other Functions
7.4 Command Control via the Network (continued)
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. (
in the Operating Guide - Technical)
However, the following reply will be sent back in the event of authentication
failure when authentication is enabled.
<Reply in the event of an authentication error>
Reply
0x1F
● TCP #9715
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.
Header
0x02
Header
Data length
RS-232C command → RS-232C commands that start with 0xBE 0xEF
Check Sum
Connection ID
64
Error code
0x04 0x00
RS-232Ccommand
0x0D
→ 0x02, Fixed
→ RS-232C commands byte length (0x0D, Fixed)
(13 bytes)
→ This is the value to make zero on the addition of the
lower 8 bits from the header to the checksum.
→ Random value from 0 to 255 (This value is attached
to the reply data)
RS-232C Communication
13 bytes
Connection
Check Sum
1 byte 1 byte