Datamax E-Class Mark II Programmer's Manual page 97

(NS) Disable Symbol Set Selection – This command prevents the <STX>y and y
commands from changing the default single-byte symbol set. When enabled, DPL
Symbol Set commands are ignored.

When enabled, the only way to change the current symbol set is with the <STX>KcAS
command.
(OF) Option Feedback Mode – This command configures the printer to output the
status of the RFID or Scanner option to the active port, as follows.
Value
D, Rx, S

Not supported on the I-4208 printer.
Once enabled, the printer will report information about the results of the last label
printed. One response per label is returned to the host (this includes each voided and
retried label). The format and contents of the returned information is as follows:
Class Series 2 Programmer's Manual
Extended System-Level Command Functions
Option Feedback Mode Units / Interpretation
= Disable
D
Rx = RFID Enable, where x is the response format:
A = ASCII
H = Hexadecimal
= Scanner Enable
S
Table 5-6: Option Feedback Command
85