There were a couple of issues with DIP switch 17 to enable the second line encoder on some of the Closed Loop models.

1. The SGF, MRE2, HMRE2, and MDA2 models would always report a Memory Configuration Data has changed. Memory will be cleared error when DIP switch 17 was present.

2. The MDA2 would report DIP Switch 17 as an Invalid DIP Switch setting.

On the hardware Issue 1 hid issue 2. On the PC simulation issue 2 was present due to differences in how the PC simulation starts vs the Hardware.