MINEGEM Machine Control ; Guidance Products Local Area Radio Network Caterpillar

In order to follow this procedure:

• Confirm the fault condition exists

• Identify the conditions that may generate the fault

• Eliminate faults in order of the general cause

Note: In general, faults are caused by problems in the following order: physical damage, environmental damage, harness failure, component failure and Electronic Control Module (ECM) failure.

Perform the following:

• Set up the Automation Operator Station and locate and sponsor a machine.

ReferenceFor more information on setting up the Automation Operator Station, refer to Operation and Maintenance Manual, "Setting Up for Operation".

ReferenceFor more information on locating and sponsoring a machine, refer to Operation and Maintenance Manual, "Preparing for Operation".

This system diagnostic procedure determines the cause of a failure in the connection of the automation operator station to the Local Area Radio Network (LARN). The error could be caused by:

• A fault in the Automation Operator Station computer rack, power supply, or network connections

• A fault in the equipment and network connection to the LARN

• A fault in the LARN power supply

• A fault in the Onboard Radio or associated wiring and antenna.

Test Step 1. Check Automation Operator Station Power.

1. Check power supply to the Automation Operator Station computer rack.

2. Check that the Uninterruptible Power Supply (UPS) (if equipped) is switched on.

3. Check that power LED indicators for the site server computer, network switch, and any other components in the computer rack are on.

Expected Result:

Power supply should be on and the UPS, site server computer, and network switch power LED indicators are illuminated.

Results:

• YES - All components are powered. Proceed to Test Step 2.

• NO - No power to the computer rack. No components are powered.

  Repair: Check and repair the power supply and retest.

  STOP

• NO - UPS is not powered.

  Repair: Check power switches and cables. Replace power switches and cables where necessary. Switch on and retest.The UPS may be faulty If the UPS remains off. Replace the UPS and retest.

  STOP

• NO - Network switch is not powered.

  Repair: Check power switches and cables. Replace power switches and cables where necessary. Switch on and retest.If the network switch remains off, the switch may be faulty. Replace the network switch and retest.

  STOP

• NO - Site server computer is not powered.

  Repair: Check power switches and cables. Replace power switches and cables where necessary. Switch on and retest.If the site server computer remains off, the site server computer may be faulty. Replace the site server computer and retest.

  STOP

Test Step 2. Check Network Switch Connections.

1. Locate the network switch in the Automation Operator Station computer rack.

2. Check the LED indicators for all network switch ports that should be connected. There should be a legend on the switch that indicates the color and function of the LED indicators. A solid LED color is normal and indicates a connection. A flashing LED indicator, which may be the same LED indicator, indicates data activity.

   Note: These indicators may be different for different network switches. Refer to the switch legend or documentation.

3. If there is no LED activity showing, then the port is not connected at this end or the remote end or connection has failed.

Expected Result:

All network connection LED indicators are illuminated or flashing for activity.

All cables undamaged and securely connected at each end.

Results:

• YES - All connections OK. Proceed to Test Step 3.

• NO - Any network connection, speed, and activity LED indicator for a port that should be connected is not illuminated. The switch cannot detect a functioning connection.

  Repair: Follow the steps:

  1. Check both ends of the network cable for a secure connection.

  2. Check the network cable and replace where necessary.

  3. Check the equipment at the other end of the connection for power and operation and replace if necessary.

  4. Try a different port on the network switch. If the problem is fixed by using another port, then mark the original port as faulty and consider repairing or replacing the network switch.

     Note: The switch may be configured so that some ports must be used for specific functions. For example, connections within the Automation Operator Station or connections to LARN areas. Consult any instructions or documentation with the switch and select an appropriate port.

  STOP

• NO - If any network cable is not securely connected then reseat the connector and retest.

  Repair: Replace the cable if there is any doubt about the connector.

  STOP

• NO - Any network cable is damaged.

  Repair: Replace the cable and retest.

  STOP

Test Step 3. Open the Site Server Computer Web Page.

Show/hide table



Illustration 1	g02067733
Home screen. Typical example.

1. From the operator console open a web browser and go to the site server computer web page at http://10.10.0.1/.

Expected Result:

Site server computer web page opens and displays the home screen.

Results:

• YES - The site server computer web page opens and displays the home screen. Proceed to Test Step 4.

• NO - Site server computer web page fails to open and displays an error. The error indicates that there is probably a fault with the operator console, site server, network, or power supply.

  Repair: Check that Site server computer web page fails to open and displays an error. Refer to Troubleshooting, Testing, and Adjusting, "Site Server - Test" in this manual.

  STOP

Test Step 4. Check Connections to the LARN.

1. Locate the cables and equipment used to connect from the network switch to the LARN area or areas that are not contacted. The specific equipment in use will vary with each site and may include:

   1. Ethernet cables

   2. Fiber converters and fiber optic cables, or

   3. SHDSL modems and cables

2. Check the operation and connections of this equipment.

3. Check for network connection and activity LED indicators.

4. Check for damage to cables or equipment.

Expected Result:

All equipment and cables connected and functioning correctly.

Results:

• YES - All equipment and cables connected and functioning correctly. Proceed to Test Step 5.

• NO - Any equipment not functioning or not connected correctly.

  Repair: Follow the steps:

  1. Check and reseat connections, and retest.

  2. Restart or power cycle equipment and retest.

  3. Check the cable and equipment connections and replace where necessary.

  4. Replace any potentially faulty equipment and retest.

  STOP

• NO - Any cables damaged.

  Repair: Replace the cables and retest.

  STOP

Test Step 5. Check Power to the LARN.

1. Move the Barrier Control Panel (BCP) isolation switch to the OFF position. Attach a "Do Not Operate" warning tag or a similar warning tag to the personal lockout on the BCP isolation switch.

2. Turn on the LARN power supply and connect all radios and repeaters. Check the voltage reading at the first LARN repeater at the end of the LARN.

Expected Result:

Voltage at all points in the LARN must be in the range 38 VDC to 63 VDC.

Results:

• YES - Voltage at all points in the LARN are in the range 38 VDC to 63 VDC which indicates that the LARN is powered correctly.

  Repair: Repeat this test procedure if necessary. Refer to Troubleshooting, Testing, and Adjusting, "Local Area Radio Network - Test" in this manual.

  STOP

• NO - No power to the first LARN repeater.

  Repair: Check: the LARN power supply, switches, circuit breakers, cables and any other equipment.

  STOP

• NO - Voltage at the first LARN repeater is greater than 63 VDC. The voltage indicates a failed LARN power supply.

  Repair: Replace the LARN power supply.

  STOP

• NO - Voltage at the first LARN repeater is less than 38 VDC.

  Repair: The lower voltage could indicate that:

  1. The LARN power supply or cables are faulty.

  2. The LARN power supply or cables are overloaded by too many LARN radios and repeaters.

  3. There is a faulty or damaged cable or connector.

  STOP

• NO - Voltage at the extremes of the LARN is less than 38 VDC.

  Repair: The lower voltage could indicate that:

  1. The LARN power supply is overloaded by too many LARN radios and repeaters. Redistribute the LARN radios and repeaters.

  2. There is a faulty or damaged cable or connector in the power circuit leading to this point. Repair the faulty or damaged cable or connector.

  STOP