Inter Character Delay (Uart); Figure 20: Ack/Nak No Response Flowchart - Opticon MDI-4000 Series Serial Interface Manual

MDI-4000 Series Serial Interface Manual
ACK/NAK No Response
ACK/NAK No Response is different from ACK/NAK mode in that if no response is received from
the host within 100 ms, the scan engine assumes that the data has been successfully received
by the host.
ACK/NAK No Response Host Responses
Response
"ACK" (ASCII:0x06)
"NAK" (ASCII:0x15)
"DC1" (ASCII:0x11)
Timeout
Start of transmission
Transmit data
Start 100 ms. timer
Response received
No
No
Timer ended
Yes
GOOD READ Buzzer

Figure 20: ACK/NAK No Response Flowchart

4.1.7

Inter Character Delay (UART)

Inter character delay adds a configurable delay after each transmitted character. This delay can
be helpful if the host does not support flow control and is not capable of handling the received
data.
To activate and save the new configuration, you need to use the Z2 command (save settings in
non-volatile memory).
Inter Character Delay Commands (UART)
Command
KA
KB
KC
KD
26
Description
The scan engine terminates transmission with the good-read buzzer.
The scan engine sends the data again.
The scan engine terminates transmission without the good-read or error buzzer.
If there is no response within 100 ms, the scan engine terminates transmission
with the good-read buzzer.
Yes
Response = NAK
No
Response = ACK
No
Response = DC1
No
ERROR Buzzer
END
Delay
No delay
20 ms
50 ms
100 ms
Yes
Yes
Yes
GOOD READ Buzzer
Default
✓