PSC SP400rf manual Hardware Control

INTERFACE

RS-232

HANDSHAKING

Review your system documentation to identify handshaking requirements, and use these labels to change the settings if required. The following brief descriptions explain each selection.

HARDWARE CONTROL

CTS/RTS Flow Control — is hardware handshaking. The scanner activates the RTS (Ready to Send) line when it is ready to send data to the host. The scanner waits for an active Clear to Send (CTS) signal from the host before transmitting data. If hardware control is disabled, CTS/RTS communication will not take place. If the host deactivates the CTS line during data trans- mission, the host will receive additional characters for no more than 2msec1.

CTS Scan Control — is also a hardware control. When scan control is enabled, label transmission is disabled until CTS is asserted and de-asserted.

1 Varies slightly depending upon baud rate selected.

18 SP400RF Programming Guide