6-26
Protocol
Settings 0 - 6 apply only to Serial Interface TriCoders only.
None
0
XON / XOFF
1
ACK/ NAK without Polling
2
Polled - No ACK / NAK*
3
Polled - with ACK / NAK*
4
Host Response Accepted*
5
Host Response Ignored
6
Data Security ON
7
Data Security OFF
8
XMODEM
9
Date Format mmddyyhhmm
A
Date Format mm/dd/yy hh:mm
B
US Date Format mm/dd/yy
C
European Date Format dd/mm/yy
D
*Requires the 5V Power Supply to be plugged into TriCoder.
None means that the TriCoder will transmit to the host computer without
waiting for a request or a response. Unless you are using multiple
TriCoders on one port (multi-dropping), None is the setting you will
probably want to use.
XON / XOFF is a protocol where the host sends an XOFF (Ctrl S / ASCII
19) character to the TriCoder when it is busy, and an XON (Ctrl Q / ASCII
17) when it is ready to receive data again from the TriCoder. This allows
the host to perform other tasks without missing data coming from the
TriCoder. XON / XOFF should not used with Linux or Unix terminals,
even if they have XON/XOFF specified; if you do, the TriCoder will
probably get hung.
ACK / NAK without polling adds the ACK / NAK protocol for data
accuracy. This protocol causes the TriCoder to add 2 checksum characters
to its data - calculated from all data (data ID + data + suffix) except
the Terminator Character. The host compares calculated checksums to the
checksums transmitted by the TriCoder. If they match, the host sends an
ACK; if they do not match, it sends a NAK. If you need to use a protocol
for data accuracy, we recommend using XMODEM instead of ACK /
NAK whenever possible.
Polled - No ACK /NAK puts the TriCoder in a “polling” mode, waiting for
the host to send the TriCoders ID character before the TriCoder sends its data.
Polled - with ACK /NAK adds ACK /NAK protocol to the “polling” mode
described above. You can change the length of time the TriCoder will wait
for a response by using the Host Response Delay setting.
