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86
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HXPRM10mnC0001E
8.2 Original Protocol
8.2.1 Data Construction
(1) Character construction
In order to send one data (byte) in start-stop synchronous communications, the following character
construction is assumed:
Start Bit (1) + Data Bit (7 or 8) + Parity Bit (1) + Stop Bit (1 or 2)
(2) Data format
The communication data is sent with data terminators added to multiple characters. Upon
receiving these terminators, the recorder starts analyzing the communication data.
(3) Error Detection
If the recorder receives the data that has resulted in a signal error such as a parity error, framing
error, etc. due to the noise or hardware troubles, it will ignore that data. Consequently, a data
format error results, determining that the data is not sent in the normal data format. The receiving
function does not execute that command and the transmitting function does not reply. The data
format error status can be confirmed by the ESC S command (described later).
(4) Control codes
ESC: 1B HEX (hexadecimal)
This code is used for an escape sequence such as opening/closing the link.
It cannot be treated as part of the text data.
CR: 0D HEX (hexadecimal)
This data is added to the end of the text data together with the LF data.
This code cannot be treated as part of the text data.
LF:
0A HEX (hexadecimal)
This data is added to the end of the text data together with the CR data.
This code cannot be treated as part of the text data.
8.2.2 Opening/Closing the Link
To communicate with the recorder, you must establish a connection between the host computer and
the recorder. In case of one-to-N communications, it is necessary to inform each recorder which
recorder the text is being sent. If a link open command is sent to multiple recorders through their send
function, all the recorders, which have received the command, will send and cannot receive the normal
data.
Ａ Ｂ
C
CR
LF
Terminator
1 Character
