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Pack Control
The packing algorithms define 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, allowing for very small delays for single characters, while keeping the
packet count low. 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 you do not
need specific functions.
Note:
All bit positions in the table that are blank represent "don't care" bits,
for that particular option, which can be set to either a 0 or 1 value.
Option
Packing Interval
Interval: 12ms
Interval: 52ms
Interval: 250ms
Interval: 5sec
Trailing Characters
None
One
Two
Send Characters
2-Byte Send Character Sequence
Send Immediately After Send chars
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.
XPort Direct+ User Guide
Table 7-10. Pack Control Options
7
6
7: Setup Mode: Channel Configuration
5
4
3
2
1
0
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
52
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