I was able to get the master code testing here with a new configuration using PCA (old and new) connected serially to the OmniPro 2 panel. I did not put in any master code and just downloaded configuration. With old PCA the master code is read serially and on the top of the list.
The test was done here:
1 - OS W2003 running on an Oracle Virtual box
2 - serial connection to OmniPro 2 panel
3 - PCA Version 2.16 (not for use to program the OmniPro 2 panel today) - old licensed version.
4 - run PCA and connect it serially to the panel
5 - configure NEW on PCA
6 - read the configuration from the panel. No master code is required to read the configuration. I never did get a prompt to enter any codes.
7 - it downloads the master code and shows up on the top of the list of codes. It comes up in a table of codes and it is code 1. It never prompted me to enter master code which is different from what I have read here:
Serial Lockout
Question:
Will a serial lockout occur if too many invalid attempts are made?
Answer:
Yes. When Leviton controllers are accessed via RS-232 (serial) connections, the software application is required to establish a secure connection by matching Code 1 (Master) in the controller with Code 1 in the software. If the codes do not match, an error "PLEASE CORRECT USER CODE 1" will be displayed.
If three invalid attempts are made with the wrong code, serial access is denied for 1 hour. Subsequent attempts within this one hour lockout will restart the one hour lockout timer.
To reset the lockout, simply power down the controller, both battery and AC, for a few seconds and power back up.
You do not see this with PCA Version 3.X and the master code is buried in the configuration.
8 - NOTE I did not have to put any codes into PCA to download the configuration with a serial wire connected to the panel. Just set the baud rate on the serial connection configuration. It will show online then download the configuration of the panel. There is a code configured to run PCA and mine has always been blank.
Best test would be to change your master code and try the above again. I am looking now in the original PCA software to see if the base master code is embedded there. "1111".
Will dig up an old parallel cable rom burner that I have here some place.