14-4
IM 765501-01E
14.3 Handshaking Method
When using the serial (RS-232) interface for transferring data, it is necessary to
synchronize the equipment so that data is not transmitted in excess of the receive buffer
on the receiving end (overrun). This procedure is called handshaking. The GS610 can
use any of the three methods below. Match the setting with your PC.
No Handshaking
If the entire command sequence fits in the receive buffer (64 K on the GS610) or when a
query command is included in the middle of the command sequence, overrun does not
occur.
Select this method when transmitting data in this fashion.
Hardware Handshaking (CTS/RTS)
This handshaking method stops the transmission by setting CTS to false before the
receive buffer becomes full and resumes the transmission by setting CTS to true when
there is enough free space in the receive buffer.
Software Handshaking (XON-XOFF)
This handshaking method stops the transmission by sending an XOFF code (0X13)
before the receive buffer becomes full and resumes transmission by sending an XON
code (0X11) when there is enough free space in the receive buffer.
Handshaking is possible by wiring only the data line, but binary data that includes XON
(0X11) or XOFF (0X13) cannot be transmitted.
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