User's Manual

SYSTEM TURN-UP PROCEDURES

13 System Turn-Up Procedures

System turn-up must follow a step-by-step procedure to avoid difficult troubleshooting. Never wire up a system

and apply power to it all at once.

13.1 System Turn up Overview

The following steps should be followed in order:

1. Do not apply power to any readers.

2. Check all wiring and reader configurations.

3. Disconnect all readers from communication line.

4. Check the supply voltage for correct voltage.

5. Power up the PC running the PIV-Station software.

6. Power up the RS-232 to RS-485 converter (if installed).

7. Configure the PC software.

8. Complete ground fault check in Paragraph 13.3 below for the converter (if installed).

9. Connect the PC and converter (if installed) to the communication line.

10. Verify that a reader powers up correctly, but DO NOT connect it to the communication line.

11. Complete ground fault check for this reader in Paragraph 13.4 below (if using RS-485).

12. Connect this reader to the communication line.

13. Verify that it communicates with the PC software.

14. If there are more readers, add the subsequent readers by repeating steps 10-13.

13.2 Reader Configuration Check

Readers must be configured correctly before they can communicate. Common problems include not correctly

selecting the correct HOST Port, failure to change mode setting to RS-485 (when used), mismatched baud

rates, and incorrect Unit Network ID. Each reader sharing the communication line must have a unique Unit

Network ID.

13.3 Ground Fault Converter Check

Before a reader is connected to an RS-485 subsystem, it must be checked for ground fault. An uncorrected

ground fault can damage all readers connected to the RS-485 communication line.

To check if there is ground fault on the RS-232 to RS-485 converter, follow the steps below:

1. Apply power to the RS-232 to RS-485 converter.

2. Connect the signal ground of the RS-485 line through a 10-kΩ current limiting resistor to the signal

ground of the RS-232 to RS-485 converter.

3. There should be no more than 1 volt across the resistor. Otherwise find and clear the fault.

13.4 Ground Fault Reader Check

To check if there is ground fault for a new reader, follow the steps below:

1. Apply power to all readers already successfully connected to the RS-485 line.

2. Power up the new reader but DO NOT connect it to the RS-485 line.

3. Connect the signal ground of the RS-485 line through a 10-kΩ current limiting resistor to the signal

ground of the PIV-Station reader.

4. There should be no more than 1 volt across the resistor. Otherwise find and clear the fault.

5. Repeat the steps in 1 to 3 with each of the RS-485 signal lines (+ and –).

6. Connect the new reader to the RS-485 line only if no ground fault is found.