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Software Installation
Smartio CP-168U User’s Manual 3-9
4. Select an Rx FIFO Trigger from the Rx FIFO Level pull-down list. Rx FIFO trigger
levels from High to Low are available, with a default value is High Level (120 bytes).
Check Set the change to all ports check-box to apply the just defined Rx FIFO
Trigger to all ports.
5. Select a Tx FIFO Size from the Tx FIFO Level pull-down list. Tx FIFO Level from
High to Low are available, with a default value is High Level (128 bytes). Check Set
the change to all ports check-box to apply the just defined Tx FIFO Size to all ports.
CP-168U v2 CP-168U v1
Tx FIFO Rx FIFO Tx FIFO Rx FIFO
High 128 120 64 56
Middle 64 60 32 28
Low 1 1 1 1
Unit: Bytes
6. Click [OK] in the Port X dialog box to confirm the port settings, and then click [OK]
in the Property dialog box to complete the port settings.
Using PComm
The PComm Diagnostic program is a very useful tool for checking the status of MOXA’s
multiport boards. It provides internal and external testing of IRQ, TxD/RxD, UART,
CTS/RTS, DTR/DSR, etc. This program can be used to make sure that MOXA’s boards
and ports are working properly.
To start this program, click on Start " Programs " PComm Lite 2000 "PComm
Diagnostic.
NOTE: If you do not have the PComm software, you can download the free version from
Moxa’s website at www.moxa.com.