Datamax-O'Neil Class Series II Programmer’s Manual - Manual (Page 128)

Extended System-Level Command Functions
114 Class Series 2 Programmer’s Manual
STX KR Reset Memory Configuration
This command resets the printer’s DRAM configuration to the default settings; see
<STX>KM
.
Syntax: <STX>KR<CR>

This command will result in a system reset for the EX2.
STX Kr Resettable Counter Reset
This command resets the internal counters. Follow this command with an <SOH>U
command to retain the reset or the counters will revert to the previous values after
cycling power.
Syntax:
<STX>Kr<CR>
STX KS Memory Configuration, Scalable Font Cache
(Non-Display Models only)
See the <STX>K command.

This command will result in a system reset for the EX2.