CPU Module

The CPU module is the control center for the PCD. The processing power of the CPU provides a true multi-tasking environment that combines protection, metering and control. The CPU includes: a 32-bit Motorola microprocessor operating at 20 MHz.

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Located on the back panel of the CPU Module, is a System Reset pushbutton and a non-isolated RS-232 communications port. Pressing the System Reset pushbutton resets the PCD microprocessor, re-initiates the internal start-up program and saves all settings in non-volatile RAM.

A non-isolated RS-232 port provides local communication with a PC to upgrade the PCD firmware using the ABB WinFlash program. Because this port is not isolated, it is not recommended for remote communications. This port is inactive whenever there is a communications module installed in Slot E. The CPU module can only reside in Slot D of the PCD case.

An internal clock time tags all faults in the Fault Record, all events in the Operations Record and Oscillographic Capture, and all values in the Load Profile record. There is an internal battery located on the CPU that powers this clock in the event of a power loss. This battery must be installed when unit is operational.

Note: In the event this battery is dead or removed, Fault Records, Operation Records, Oscillographic records and Load profile data will be lost. Programmed settings and counters, however, will be retained.

For prolonged storage, stop the PCD clock to ensure long battery life. The battery should last the life of the PCD. To turn off the internal battery backed-up clock use the following procedure:

1. Press Enter [↵] to activate the menu.

2. Scroll to Settings and press Enter [↵].

3. In the Settings menu, scroll to Change Settings and press Enter [↵].

4. In the Change Settings menu, scroll to Clock Settings and press Enter [↵].

5. Set the unit clock using the arrow keys.

Figure 2-8. CPU Module

2.5.6.2 Procedure to Load New Firmware

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2. If you do not have WinFlash, contact ABB.

3. WinFlash is a utility program that allows you to download firmware to the PCD. It does not contain the actual firmware.

4. For the firmware, contact ABB PTMV at 1-800-929-7947 x 5 x 1 or +1-407-732-2000 x 2510 and request a copy of the latest firmware file.

5. Copy the firmware file to your hard drive under C:\Program Files\WinFlash.

6. Power down the PCD by opening the L1, L2, Batt(+) and Batt(-) fuse blocks. Verify that the power is removed by visual inspection of the front of the control. All of the LED indicators and the backlit display should be off.

7. Remove the COM2, COM3 or COM4 module (depending upon your PCD style number), the second module from the right when facing the back of the PCD, from the back of the PCD. With a small Phillips screwdriver, remove the two Phillips screws that secure the module to the PCD. You will also need a small standard screwdriver to slide out the COM2, COM3 or COM4 module. This module will remain disconnected from PCD during the entire WinFlash process. Note that if you have a COM5 module in the PCD you can connect directly to the upper “RP” 9 pin serial port for the flash and not remove any modules.

8. Re-power-up the PCD.

9. Connect the RS-232 port from the PC to the NON-ISOLATED RS-232 port on the CPU card (using a null modem cable or adapter).

10. Start WinFlash and press Quick Autodetect. This should bring up a screen verifying connection of the PC to the PCD. If this doesn’t occur, check the following through the HMI: Go to Settings, Change Settings, Communications. The PCD should be set for Address 001; Frame = N, 8,1; baud = 9600 and the protocol must be set to MODBUS^ ASCII. Try Quick Autodetect or Full Autodetect again.

11. Once communication is established, select Utilities - Update Flash ROM. A new window will appear.

12. In the new window, choose Select File, then from C:/Program Files/WinFlash select from Files of Type: All Files (*.*), the file, then click Download Flash.

13. The process should take approximately 20 - 35 minutes.

14. You are finished when the slide bar displays 100%.

15. If for some reason the download fails, WinFlash will report an error and the PCD will continue to display “PCD Monitor” on the screen. In this event, check your connections, close all programs (e.g. screen saver) and restart WinFlash. Do another Autodetect.

WinFlash should locate the unit by indicating that it “Received Monitor Response”.

Proceed with step 11 above. If this is not successful, contact ABB.

16. If for some reason the download fails again, an alternative method for flashing is to power down the PCD and remove the CPU module and install a jumper labeled “J7”. This will force the PCD into Monitor mode. This jumper is labeled J7 at the lower left area of the CPU board. If no jumper is present, one may be taken from an unused jumper socket on the COM board, such as the RTS timing jumper. Once this jumper is installed, replace the CPU and power up the unit. The display should read PCD Monitor on the screen. Resume flashing at step 8 above. When the flash is complete, remove the jumper and replace it on the COM board.

17. When the download is successful, power down the PCD, reinsert the COM2, COM3, COM4 or COM5 module into the PCD, and insert the two Phillips screws to secure the module into the PCD.

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18. The PCD is now updated. Power up the PCD and verify the CPU Software Version Number you require in the Unit Information Menu.