Test setup

1. Do not configure any other protocols. Temporarily delete other boards and units while performing this test.
2. Configure a unit for each port to be tested. Make the I/O Devices form look as follows:
3. • Name: <unique name for the I/O Device>
   • Number: <unique network number for the I/O Device>
   • Address: NA
   • Protocol: LOOPBACK
   • Port Name: <the "Port Name" in the Ports form>
3. The following Citect.ini options are supported:
4. • [LOOPBACK]

   • LoopBack - Set this to 1 if internal loop-back is to be performed (make sure this is deleted after running the test). When set to 0, a loop-back connector which ties pins 2 and 3 together is necessary at each port.

     Note: The COMx driver does not support internal loop-back. The external loop-back is the default mode.

     Size - Sets the maximum frame size. The length of each frame transmitted is random between 1 to 'Size'-1. The default size is 512.

4. Start up CitectSCADA. Each port will transmit a frame of random length. This process is repeated when the entire frame is received.
5. Open the kernel, type "page driver" and press Enter. Type V to set the display mode to 'verbose'. The following statistics appear:
6. • Number of characters transmitted.
   • Number of frames transmitted.
   • Number of characters received.
   • Elapsed time in milliseconds.
   • Characters received per second.
   • Start time in milliseconds.
   • Total number of errors.
   • Error code of last detected error.

   • Note: The total number of errors should be 0. If the number of errors reported is not zero, your serial hardware is not operating properly.