Nidek Medical LM-1800P, Инструкция по интерфейсу

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8
RS-232C Communication and USB Communication
:
Communication Format
MLM26*RTZ002F
2.2.1 Command Format
The commands (control character string) that are transmittable from and receivable by the LM are
described below. These commands reciprocally control the LM and computer to make them transmit
and receive data. The format of a basic command is described below:
(1) RD command (Computer
→
LM)
Command for the computer to request the LM to save the measurement data. The com-
mand corresponds to the actuation of the read key of the LM. The command also holds the
values displayed on the screen. Before making the LM to transmit data to the computer, this
command should make the LM to save the measurement data.
(2) SD command (Computer
→
LM)
Command for the computer to request the LM to transmit the measurement data. The com-
puter sends this command to the LM when the computer is ready for the reception of mea-
surement data.
(3) RS command (LM
→
Computer)
Command for the LM to request the computer to receive the measurement data and to send
the “SD command”. The command is used to transmit data with switch operation of the LM.
The computer sends the SD command to the LM when the computer receives the RS com-
mand and is ready for the reception of measurement data.
“C**” represents that the LM sends the command to an infinite number of destinations.
SOH C L M STX R D ETB EOT CR
: Character string
(10 characters in this case)
01H 43H 4CH 4DH 02H 52H 44H 17H 04H 0DH : Character code (H = Hexadecimal)
The CR code is added.
Characters representing
the RD command
Command to be sent to the LM. “**”
represents the unspecified commands.
Characters representing a command
SOH C L M STX R D ETB EOT CR
01H 43H 4CH 4DH 02H 52H 44H 17H 04H 0DH
SOH C L M STX S D ETB EOT CR
01H 43H 4CH 4DH 02H 53H 44H 17H 04H 0DH
SOH C * * STX R S ETB EOT CR
01H 43H 2AH 2AH 02H 52H 53H 17H 04H 0DH