Two questions regarding non-volatile storage:

1) Does either the SM2315D or SM2315DT contain a data EEPROM?

2) Presumably, both contain a program EEPROM; what is its size?

1) The SM2315D and SM2315DT now include EEPROM for Long Term Data memory to be used with EPTR=, VST, and VLD commands.

2. Both the Long Term Data Memory and Programming memory are 32KByte in size.

Is this also true for SM2315D and -DT that were shipped in the past? I am running a test using EPTR=, VST and VLD that doesn't perform as expected.

In the past, this would be an option. The part number will be SM2315M for the SM2315D and SM2315MT for SM2315DT. The M is for Long Term Data Memory. If the EPTR=, VST, and VLD commands used and the value was not stored, then the motor does not have this memory.

Is the only restriction to setting EPTR the 32,339 mark? I have only one variable to store at the moment, so should I just set EPTR = 0? (Motor Model 21365D)

Yes. EPTR=0 is acceptable.