My recently acquired Hyundai HIT8s is able to up load and download programs over RS232 but when I turn the machine off it does not retain the serial port settings when powered up again. I have a new lithium backup battery installed. What parameter setting will allow me to save the settings until changed intentionally? 

I had to reinitialize the serial port. Heres the instructions for Hyundai for 4.8 and 4.9 OS. Control decided to un-initialize for some reason. 

110018 serial interface not initialized

Cause:
Interface incorrect or not parameterized.
Action / Procedure:
Select suitable interface file and re-parameterize.
Refer to the procedure MMC version 4.8 / version 4.9
How to check the MMC version 4.8 / version 4.9

• Press Menu Select
• Press Diagnosis
• Press Start-Up




Solution:
WHEN UPDATING TO VERSION 4.9, THE HYUNDAI USER INTERFACE IS NO LONGER
USED. THE FOLLOWING PROCEDURE SHOULD BE FOLLOWED TO DELETE AN MMC
FILE, WHICH WILL CAUSE SOME I/O INTERFACE PROBLEMS.
• Press Menu Select
• Press Diagnosis
• Press Password
• Press “1111”
• Press “Yellow” Input key
• Press Set
• Press Start-Up
• Press Backup
• Press Start
• ** Wait for control to boot to the time and date prompt.**
• Set Time and Date if necessary.
• Press “3” (DR DOS Shell)
• Enter Password - “mmc01_ss”
• Verify Password - “mmc01_ss”
• Type (CDMMC.001) press enter
• Type (CDUSER.005) press enter
• Type (CDSERV.038) press enter
• Type (DELGEZUORD.039) press enter
• Turn machine power off.
• Wait 20 seconds then power machine up.
• Your communications port should now operational.
WHEN UPDATING TO VERSION 4.8, IN THE EVENT OF ALARM CONDITIONS #10018 INTERFACE NOT INITIALIZED, THE HYUNDAI USER INTERFACE NEEDS TO BE RE-PARAMETERIZED.
• Press Menu Select
• Press Diagnosis
• Press Password. Input 1111,input, Press Set
• Press Start-up, Press Back-up
• Press Start and wait until the control boots to the time and date prompt.
• Set the time and press the yellow input key.
• Set the date and press the yellow input key.
• Select # 3 (DR DOS shell) from the menu.
• Enter the password. “MMC01_SS
• Verify password enter password again.
• Wait for the DR DOS prompt
• Type in UI and press enter.
• Select Standard Interface
• Wait for the message done.
• Power machine off. Wait 20 seconds, power back on and wait for control to boot.
• Press Menu Select
• Press Data I/O then Devices
• Select Standard and press Edit.
• Set device settings to 9600, RTS/CTS, 8,1, None and PC FORMAT.
• Press Store and then highlight Standard
• Press Selection.
• Press Data Output and use down arrow to highlight LOCAL.
• Go to your desktop orlaptop computerand set it up to receive.
• On control press output start. Data should now transfer to your computer.
• To return to Hyundai interface continue with the following steps.
• Press Menu Select
• Press Diagnosis
• Press Password. Input 1111, input, Press Set
• Press Start-up, Press Back-up
• Press Start and wait until the control boots to the time and date prompt.
• Set the time and press the yellow input key, Set the date and press the input key.
• Select # 3 (DR DOS shell) from the menu.
• Enter the password. “MMC01_SS.
• Verify password enter password again.
• Wait for the DR DOS prompt
• Type in UI and press enter.
• Select Hyundai Interface, Wait for the message done
• Power machine off. Wait 20 seconds, power back on and wait for control to boot.
• Machine is now back in Hyundai Interface Mode.