I/A Series G3 ENC time of day clock runs slow. Can this be corrected in the field.
TAC I/A Series
I/A Series G3 ENC (remanufactured replacement)
We have determined that the time clock constant was incorrectly set in some remanufactured ENC-520 controller boards. The result is that the ENC-520 time clock (time of day clock) will not maintain proper time.
- Connect to the ENC using the Serial adapter and a Windows Terminal program such as HyperTerminal. If you need information on how to use the Serial Shell (terminal connection), refer to Chapter 1 (Recover Tips, Serial shell, page 26) of the "Jace Niagara -AX Install and Startup Guide, found in the Docs folder of your 3.5.34 installation directory.
- Make sure that you have installed a jumper on the outer pair of pins of the MODE connector (upper right corner of circuit board -- see photo at right).
- Reboot the ENC by disconnecting and reconnecting the power plug.
- Allow the ENC to reboot and wait for the login prompt to be displayed in your terminal program.
- Log in using the hardware user name and password.
- Wait for shell menu and the "Enter Choice" prompt to be displayed.
- Type sh and press enter.
- At the # prompt, type lfss -c and press enter.
- The current clock multiplier will be displayed. I expect that the current multiplier is 96000000.
- Type lfss -c 96065600 and press enter. Wait for the # prompt to be redisplayed.
- Verify that the entry was properly entered by typing lfss -c and pressing enter .
- The value 96065600 should be displayed.
- Type exit and press enter to return to shell menu.
- Press 7 to reboot the ENC. Press y to confirm the reboot and press enter.
The ENC will reboot. Remove the mode jumper and disconnect the serial cable.