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14
Wi232/WiUSB User Guide
Pack Control
The packing algorithm defines how and when packets are sent to the network. The standard algorithm is
optimized for applications in which the unit is used in a local environment. The alternate packing algorithm
minimizes the packet count on the network and is especially useful in applications in a routed Wide Area Network
(WAN). Adjusting parameters in this mode can economize the network data stream.
Pack control settings are enabled in Flush Mode. Set this value to 00 if specific functions are not needed.
Pack Control Options
Option
7
6
5
4
3
2
1
0
Packing Interval
Interval: 12ms
0
0
Interval: 52ms
0
1
Interval: 250ms
1
0
Interval: 5sec
1
1
Trailing Characters
None
0
0
One
0
1
Two
1
0
Send Characters
2-Byte Send Character
Sequence
1
Send Immediately After
Send chars
1
Packing Interval:
Packing Interval defines how long the unit should wait before sending accumulated characters.
This wait period is between successive network segments containing data. For alternate packing, the default
interval is 12 ms.
Trailing Characters:
In some applications, CRC, Checksum, or other trailing characters follow the end-of-sequence
character; this option helps to adapt frame transmission to the frame boundary.
Send Characters:
If 2-Byte Send Character Sequence is enabled, the unit interprets the sendchars as a 2-byte
sequence; if this option is not enabled, the unit interprets them independently.
If Send Immediately After Characters is not set, any characters already in the serial buffer are included
in the transmission after a "transmit" condition is found. If this option is set, the unit sends
immediately after recognizing the transmit condition (sendchar or timeout).
Note:
A transmission might occur if status information needs to be exchanged or an acknowledgment needs to be sent.
4.2.12 DisConnTime (Inactivity Timeout)
Use this parameter to set an inactivity timeout. The unit drops the connection if there is no activity on the serial
line before the set time expires. Enter time in the format
mm:ss,
where m is the number of minutes and s is
the number of seconds.
DisConnTime (0: 0) ?:
To disable the inactivity timeout, enter
00:00.
Range is 0 (disabled) to 5999 seconds (99 minutes, 59
seconds). The default is 0.