8: Setup Mode: Channel ConfigurationXPress DR+ User Guide 61Pack ControlThe packing algorithms define how and when packets are sent to the network. Thestandard algorithm is optimized for applications in which the unit is used in a localenvironment, allowing for very small delays for single characters, while keeping thepacket count low. The alternate packing algorithm minimizes the packet count on thenetwork 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 needspecific functions.Note: All bit positions in the table that are blank represent “don’t care” bits, forthat particular option, which can be set to either a 0 or 1 value.Table 8-10. Pack Control OptionsOption 7 6 5 4 3 2 1 0Packing IntervalInterval: 12ms 0 0Interval: 52ms 0 1Interval: 250ms 1 0Interval: 5sec 1 1Trailing CharactersNone 0 0One 0 1Two 1 0Send Characters2-Byte Send Character Sequence 1Send Immediately After Send chars 1Packing IntervalPacking Interval defines how long the unit should wait before sending accumulatedcharacters. This wait period is between successive network segments containing data.For alternate packing, the default interval is 12 ms.Trailing CharactersIn 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.
