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Controlling the MSR / MICR functions Additional commands (Printer)
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T5023/5023+ - Programming Guide
The MICR Read Process
Two jobs must be issued to the printer for every magnetic stripe read process:
– a parameter job specifying the number of repetitions required for read errors,
and the font type (CMC7/E13B),
– the actual read command.
The parameter n3 in the parameter job (CMC7 / E13B) informs the firmware that
the next MSR read job is a magnetic ink character recognition process. When
the MICR process is completed, the previously deactivated MSR parameter is
re-enabled.
Behavior when reading magnetic ink characters and passbooks
A mechanism is required to ensure that a passbook is not inserted too far for the
magnetic ink character recognition, because the reader's permanent magnet
may destroy the MSR recording on the passbook.
Therefore a journal has been defined with a max. settable width (see parameter
job MSR / MICR reader) for the MICR read function. The default value is 102mm.
The parameter n4 is used by the application to transfer the max. admissible jour-
nal width (cheque width in normal view). If the parameter n4 contains a value be-
low "496" (496/180 inches = 70mm) or a value above "1490" (1490/180 inches
= DIN A4 width), then the max. admissible width is automatically set to the de-
fault value "725" (725/180 inches = 102mm, specification according to: ISO
1004, ABA Specification, Credit Document and Code Line Dimen-sions).
If the document inserted for reading the magnetic ink characters is wider than
specified, the read process is not started, and the document is not moved. The
printer remains in the ’ONLINE PAPER’ status, and the normal MSR acknowled-
gement is sent to the application, together with the error code 8 (max. admissible
paper width exceeded). The application controls the subsequent processing of
the document.
For the MICR read process the parameter n4 has a different meaning
than for the other MSR functions:
MSR: n4 = vertical distance from the form edge (in 1/180 inches).
MICR: n4 = max. admissible journal width for magnetic ink character
reading
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