YOKOGAWA CW120 - Page 134

11-4
IM CW120-E
When Selecting XON/XON
• Transmission Control
A software handshake is performed between the CW120/121 and
computer. When the CW120/121 receives the X-off code from the
computer while transmitting data, the CW120/121 quits the transmission.
Then, when it receives the X-on code next, it restarts the transmission.
The CW120/121 ignores CTS (CS in JIS) from the computer.
• Reception Control
A software handshake is performed between the CW120/121 and
computer. When the free space in the reception buffer decreases to 256
bytes, the CW120/121 transmits the X-off code to the computer. When
the free space in the reception buffer increases to 768 bytes, the CW120/
121 transmits the X-on code to the computer. RTS (RS in JIS) is always
true.
When Selecting XON/RS
• Transmission Control
A software handshake is performed between the CW120/121 and
computer. When the CW120/121 receives the X-off code from the
computer while transmitting data, the CW120/121 quits the transmission.
Then, when it receives the X-on code next, it restarts the transmission.
The CW120/121 ignores CTS (CS in JIS) from the computer.
• Reception Control
A software handshake is performed between the CW120/121 and
computer. When the free space in the reception buffer decreases to 256
bytes, the CW120/121 resets RTS (RS in JIS) to false. When the free
space in the reception buffer increases to 768 bytes, the CW120/121 sets
RTS to true.
When Selecting CS/RS
• Transmission Control
A software handshake is performed between the CW120/121 and
computer. When the CW120/121 detects that CTS (CS in JIS) has
become false while transmitting data, the CW120/121 quits the
transmission. Then, when it detects that CTS has become true next, it
restarts the transmission. The CW120/121 handles X-on/X-off codes sent
from the computer as data.
• Reception Control
A software handshake is performed between the CW120/121 and
computer. When the free space in the reception buffer decreases to 256
bytes, the CW120/121 resets RTS (RS in JIS) to false. When the free
space in the reception buffer increases to 768 bytes, the CW120/121 sets
RTS to true.
11.1 RS-232