104
9−3−2.
Specifications for interface
(1)
Method Corresponds to RS−232C.
(2)
Specifications for signal
Baud rate : 600, 1 200, 2 400, 4 800, 9 600, 19 200 bps
Data bit length : 7 bits, 8 bits
Parity bit : Non, Even, Odd
Stop bit : 1 bit, 2 bits
Terminator : CR+LF
Communication method : Half duplex
Synchronous method : Start−stop synchronous method.
Transmission data : ASC II code
Input/output monitor with LED
9−3−3.
Procedures of data transfer
There are two kinds of data transfers in the instrument, that is, Stream mode and Command
mode.
(1)
Stream Mode
The latest data Targeted/selected with FUNC−28 keeps on outputting. However, output times
may differ depending on the setting of display times and also the setting of baud rate.
(2)
Command Mode
By sending the determined command/data from the host(Personal computer, sequencer and so
on) to CSD−814B, data will be sent back to host side from CSD−814B corresponding to the
command/data.
Be sure to execute communication according to the below procedures.
Start
Command / Data
Data
Host → CSD−814B
CSD−814B → Host
● During the measurement mode only, communication can be executed.
That is, communication can’t be executed whichever in Function
mode, Calibration mode, nor Fine adjustment mode.
● Flow control is not executed in CSD−814B.
● CTS/RTS signal isn’t applied.
● X flow control isn’t performed.
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