95
(3) Error detection
If the recorder receives data as a result of a signal error such as a parity error and framing error due
to noise or hardware problems, this data will be ignored. Consequently, a data format error will
result, as the data was not sent in the normal data format. That command will not be executed in the
receiving function, and no response will result in the transmitting function. 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 link opening/closing.
This code cannot be treated as a 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 a 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 a part of the text data.
8.2 Opening/Closing the Link
To communicate with the recorder, a connection between the host computer and the recorder must be
established. In the case of one-to-N communications, it is necessary to inform each recorder to which
recorder the text is being sent. If a link open command is sent to multiple recorders through their sending
function, all recorders which have received the command will send data. As a result, normal data cannot
be received.
8.2.1 Open Command
(ESC)O
01
(CR)(LF)
Address (01 to 32)
Space (20 Hex.)
To communicate with the recorder, the host computer must issue this command and must memorize
that it has issued this command.
8.2.2 Close Command
(ESC)C
01
(CR)(LF)
Address (01 to 32)
Space (20 Hex.)
When sending data to the recorder to which the open command has not been issued, the host
computer must issue this command to the reocrder to which the open command has been issued.
Summary of Contents for HR-700
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