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7: Setup Mode: Channel Configuration
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.
Table 7-9. Pack Control Options
Option 7 6 5 4 3 2 1 0
Packing Interval
Interval: 12 msec 0 0
Interval: 52 msec 0 1
Interval: 250 msec 1 0
Interval: 5 sec 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. The default setting is 00 (none).
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. The default setting is 0 (disabled).
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). The default setting is 0.
UDS2100 User Guide 54