Nidek Medical LM-1800P, Инструкция по интерфейсу

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MLM26*RTZ002F
4
4.
METHOD OF RS-232C
COMMUNICATION (NCP20)
NIDEK communication protocol “NCP20” performs establishment of the communication and multi
block data communication by command handshake without control line (DTR/DSR).
4.1 Block Format
Basic format
* The blocks composed of 2 bytes such as commands are sent from upper bytes.
[SOH/EOT]
SOH (0x01) indicates first cord and EOT (0x04) indicates end cord of the block. Each is
always added to the start or end of the blocks.
[Command cord]
The definition of the command cord is as shown in the table below.
[Source port No.]
When request conflict occurs in one-to-one serial communication, these port numbers are
compared and the port with large number is preceded.
The numbers can be changed. (0 to 255)
[Destination port No.]
This is set when the destination port No. is necessary for specific network configuration. (0
to 255)
SOH
(0X01)
Command
Source
port No. Destination
port No.
Number
of unsent
blocks
Message
length
Message
Checks
um EOT
(0x04)
1 byte
2 bytes 2 bytes 2 bytes 2 bytes 2 bytes X bytes 2 bytes 1 byte
Command Cord (Hex) Contents
Request to Receive 0x0001 Request to send data
Request to Send 0x0002 Request to accept data sending
Accept to Receive 0x0003 Accept to request for data sending
Accept to Send 0x0004 Accept to send data
Accept 0x0005 Response in acceptance and normal data reception
Data 0x0006 Data sending
Error 0x0007
Response in occurrence of abnormal command, checksum
error
Abort 0x0008 Abort of communication