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3.14.12 Pack Control
Two firmware-selectable 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 specific functions are not needed.
Table 15 - 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 not set, they are interpreted independently.
If Send Immediately After Send Characters is not set, any characters already in the serial buffer are
included in the transmission after a "transmit" condition is found. If 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.
3.14.13 DisConnTime (Inactivity Timeout)
Use this parameter to set an inactivity timeout. The connection is dropped if there is no activity on the serial
line before the set time expires. Enter time in the following format: mm:ss, where m is the number of
minutes and s is the number of seconds. To disable the inactivity timeout, enter 00:00. Range is 0 (disabled)
to 5999 seconds (99 minutes, 59 seconds). Default setting is 0.
NET485 User Guide 3-37