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Using the RS-232-C Interface
37
256 bytes
Used
Free, 64 bytes
When handshaking is in use, reception of
data will stop when the free space in the
buffer drops to 64 bytes since data cannot
be passed to the main program fast
enough to keep up with transmission.
Used
Free, 192 bytes
After the reception of data stops, data
continue to be passed to the internal
program. Reception of data starts again
when the free space in the buffer
increases to 192 bytes.
Used
Whether handshaking is in use or not, if
the buffer becomes full, any additional
received data are no longer stored and
are discarded.
Data Receiving Control in Handshaking Mode
Setting Data Format
The RS-232-C interface of this instrument performs communications using start-stop
synchronization. In start-stop synchronization, one character at a time is transmitted.
Each character consists of a start bit, data bits, parity bit, and stop bit. (Refer to the
figure below.)
Data bit
(7 to 8 bits)
1 character
Stop bit
1
1 or 2 bits
2
Start bit
Circuit idle state
Level returns to
idle state (dotted
line) or the start
bit of the next
new data item
(solid line)
Parity bit: odd,
even, or none
The table below shows the data format combinations supported by this instrument.
Setting
0
1
2
3
Start bit
1
1
1
1
Data length
8
7
7
7
Parity
No
Odd
Even
No
Stop Bit
1
1
1
2
Selecting the Baud Rate
The following baud rates can be selected.
150, 300, 600, 1200, 2400, 4800, 9600
Selecting the Terminator
The following terminators can be selected.
CR+LF, LF, CR
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