Yokogawa DR240 - Manual (Page 17)

2-7 IM DR231-11E
Overview and Specifications of RS-232-C Interface
2
XON-DTR
• Transmission data control : A software handshake status is established between the recorder
and the host computer. The recorder will stop a data transmission
when an X-OFF signal is received from the host computer. The
data transmission will be resumed when the next X-ON signal is
received. The CTS signal from the host computer is ignored.
• Reception data control : A hardware handshake status is established between the recorder
and the host computer. When the recorder recept of data becomes
impossible, an ‘DTR=False’ status will be established. When data
recept become possible, an ‘DTR=True’ status will be established.
RTS=True (Fixed).
CTS-RTS
• Transmission data control : A hardware handshake status is established between the recorder
and the host computer. The recorder will stop a data transmission
if a ‘CTS=False’ status is established, and will resume the
transmission when a ‘CTS=True’ status is established. The X-
OFF and X-ON signals from the host computer are processed as
data.
• Reception data control : A hardware handshake status is established between the recorder
and the host computer. An ‘RTS=False’ status will be established
when the recorder recept of data becomes impossible, and an
‘RTS=Ture’ status will be established when data recept becomes
possible. DTR=Ture (Fixed).
CTS-DTR
• Transmission data control : A hardware handshake status is established between the recorder
and the host computer. The recorder will stop a data transmission
if a ‘CTS=False’ status is established, and will resume the
transmission when a ‘CTS=True’ status is established. The X-
OFF and X-ON signals from the host computer are processed as
data.
• Reception data control : A hardware handshake status is established between the recorder
and the host computer. A ‘DTR=False’ status will be established
when the recorder recept of data becomes impossible and a
‘DTR=True’ status will be established when data recept becomes
possible. RTS=Ture (Fixed).
2.4 Handshake Format Selection