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Query Printer Model and Hardware Revision Level ESC P )
This command will cause the printer to send the hardware model to the host.
Escape Sequence: ESC P )
Hexadecimal: 1B 50 29
Decimal: 27 80 41
After sending the previous command, the printer will respond with the ASCII sequence:
ASCII Sequence:<string> CR LF
The <string> field represents the hardware model.
Magnetic Card Reader
A three track Magnetic Card Reader is an option available on the Datamax-O’Neil printers. The MCR reader is designed
to read magnetically encoded data from cards conforming to ANSI/ISO 7810, 7811 standards.
The MC reader converts the F2F encoded signals on the magnetic card, to ISO7811 compatible ASCII format and
transmits the information to the host computer or terminal. Also, the MCR can read one, two or three tracks
simultaneously and bi-directionally.
The table below summarizes the format of the data stored on each magnetic track.
Track Position
Track 1
ISO1 (IATA)
Track2
ISO2 (ABA)
Track3
ISO3(MINTS)
Recording Density 210 BPI 75 BPI 210 BPI
Recording Capacity 79 characters 40 characters 107 characters
Number of data bits 7 5 7
Card Thickness .76 mm +/- 0.08 mm
Read Magnetic Card Data ESC M n1 n2 t (CR) or ESC m n1 n2 t (CR)
This command activates the MRC reader and waits until the user swipes a card (or until the timer times out). The
<n1><n2> parameters are used to set the MC reader’s timer. "01" through "99" are valid timer settings. “00” disables
the timer. The ‘t’ value indicates which MCR track number to read.
The printer aborts and transmits the time-out error message if the operator fails to swipe a card within the time period
set by the host application.
If the timer times out, the printer aborts the swipe process, transmits the timeout error message and switches off the
<READING> LED. A good magnetic card swipe automatically terminates the read process. The following table details
the possible combinations for this command:
Magnetic Card Command String Description
ESC M n1n2 1 CR (CR = Carriage Return) or
ESC m n1n2 1 CR (CR = Carriage Return)
Read Track1 only
ESC M n1n2 2 CR or ESC m n1n2 2 CR Read Track2 only
ESC M n1n2 3 CR or ESC m n1n2 3 CR Read Track3 only
ESC M n1n2 4 CR or ESC m n1n2 4 CR Read Track1 and Track2 simultaneously
ESC M n1n2 5 CR or ESC m n1n2 5 CR Read Track2 and Track3 simultaneously
ESC M n1n2 6 CR or ESC m n1n2 6 CR Read Tracks 1,2 and 3 simultaneously