TH320/TH420
Programmers Guide
93
MICR commands (TH320 MICR models only)
These commands control the Magnetic Ink Character Recognition (MICR) check reader, including how
it parses the character strings on checks.
The section, MICR parsing, describes how to create a parsing format and how to create and maintain
an exceptions table.
Read MICR data and transmit
ASCII
ESC w 1
Hexadecimal
1B 01
TH320 1B 01= read & transmit MICR, position for
endorsement
1B 02 (TH320 only)
TH320 1B 01= read & transmit MICR, position for
endorsement
TH320 1B 02 = wait for check, read & transmit MICR,
position for endorsement
Decimal
27 119 1
Default:
All data returned
Reads and transmits the MICR data and adds a carriage return (0x0D).
If no parsing format is selected with either of the define parsing format commands (see below), all data
will be returned, which is the default.
Transmit last MICR read
ASCII:
ESC w R
Hexadecimal: 1B 77 52
Decimal:
27 119 82
Resend the previously decoded MICR data (as if the parsing has not been defined) to the host. The return
data is defined in the “Read MICR data and transmit” command (1B 77 01) without parsing and presents the
data from the last MICR read since power-up or reset or indicates in the status that no read has yet
occurred.
MICR parsing
This section describes MICR parsing in detail and includes several examples of useful parsing
variations. It also describes how to create a parsing format and how to create and maintain an
exception table.
Define parsing format, save in NVRAM
ASCII:
ESC w P d 1 d2 … dn CR
Hexadecimal: 1B 77 50 d 1 d2 … dn 0D
Decimal:
27 119 80 d 1 d2 … dn 13
Defines and saves parsing format. See parsing parameter string options in this document. Send with
this command the parse data that is to be the default parse string at printer power-up. If no parameters
are selected, parsing is not performed.
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