Opticon MDI-4000 Series, Руководство по последовательному интерфейсу, Страница: 34 / 139

MDI-4000 Series Serial Interface Manual
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Use these commands to set the number of data bits, type of parity bit, and number of stop bits.
To activate and save the new configuration, you need to use the Z2 command (save settings in
non-volatile memory).
Data Bit, Parity Bit, and Stop Bit Commands
Data, Parity, and Stop Bit Command Description Default
Data bit L0 7 data bits
L1 8 data bits
✓
Parity bit L2 No parity
✓
L3 Even parity
L4 Odd parity
Stop bit L5 1 stop bit
✓
L6 2 stop bits
4.1.6 Handshaking (Flow Control)
Handshaking is a communication control method.
To activate and save the new configuration, you need to use the Z2 command (save settings in
non-volatile memory).
Handshaking Commands
Command Description Default
P0 No handshake
✓
P1 Busy/ready
P2 Modem
P3 ACK/NAK
P4 ACK/NAK NO RESPONSE
4.1.6.1 No Handshake:
The scan engine communicates regardless of the state of the host system. In this setting, the
commands from the host system may not be received correctly.
Figure 13: No Handshake
Scan Engine
Host System
TxD TxD
RxD RxD