Test Setup

Do not configure any other protocols. Temporarily delete other boards and units while performing this test.

Configure a unit for each port to be tested. Make the I/O Devices form look as follows:

• 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>

The following Citect.ini options are supported:

• [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.

Start up Plant SCADA. Each port will transmit a frame of random length. This process is repeated when the entire frame is received.

Open the kernel, type "page driver" and press Enter. Type V to set the display mode to 'verbose'. The following statistics appear:

• 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.