If your system requires a WORD length of 8 bits and 1 or 2 STOP bits, but no PARITY, select the option below:
Table 3. 8 Bit, No Parity
8
1
None
EM
8
2
EN
PARITY check is not possible with this combination of STOP bits and WORD length.
Some receiving equipment requires inverted serial communication signals.
CD
Inverted Serial Communications
Communications Protocol
XON/XOFF
Protocol controls data flow between your PSC scanner and a serial host computer. If Protocol = XON/XOFF is selected, the scanner rec- ognizes the ASCII XON/XOFF characters. The host may then stop transmission with XOFF and resume with XON.
Controlled data flow is achieved between devices when the receiving device sends ASCII XON/XOFF codes to the transmitting device. In other words, when the receiving device is unable to accept data, it sends on XOFF code to inform the host to temporarily suspend data transmission.
When the receiving device “catches up,” it sends an XON code to inform the host that it is again ready to accept data. An advantage of this protocol is that additional hardware is not required for imple- mentation; only transmit, receive, and signal ground are required.
16 | User’s / Programming Guide |
