MagTek MICR Plus RS-232 - Manual (Page 25)

Section 4. Commands
17
SWC PARAMETERS
The SWC functions are listed in Table 4-5 and described below.
CMC-7 Character Set
If NO is selected, the MICR Reader will only read E13-B characters. When YES is selected, the
MICR Reader will read both CMC-7 and E13-B characters (see Appendix B). However, the
MICR Reader will only output raw data ("as is" on the check) for checks with CMC-7
characters.
Invalid Command Response
Invalid command response is the action the MICR Plus takes upon receipt of a command it does
not recognize. It can also be used to stop the MICR Plus from receiving any more commands.
The first option “?”
is the default. If the MICR Plus receives an unrecognized command,
it will return a question mark and carriage return to the host. The MICR Plus will then return to
an idle state and wait for further commands or check/credit card reads.
For the second option, “no reply - header required,” the MICR Plus will only execute commands
preceded by a GS ASCII character (hex 1D), and it will not reply to invalid commands. When
this option is selected, all messages received without a GS header will be transmitted “as
received” through the RS-232 auxiliary port.
For the third option, “no reply,” the MICR Plus will execute all valid commands, but it will not
reply to invalid commands.
The fourth option, “ignore all commands,” causes the MICR Plus to stop receiving any Host data
and to ignore any further commands. Even the SA (Save) command is ignored and therefore this
fourth option is only temporary. To make this option permanent or to reset it, you must use an
Insta-Change check.
Active RTS
When this function is set to YES, the MICR Plus will raise RTS and wait 5 seconds for CTS to
become active before sending any data. If the 5 seconds expire and CTS is not active, the data
message will be discarded and nothing will be sent.