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
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
The table below summarizes the format of the data stored on each magnetic track.
Track Position | Track 1 |
| Track2 | Track3 |
ISO1 (IATA) |
| ISO2 (ABA) | ISO3(MINTS) | |
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Recording Density | 210 BPI |
| 75 BPI | 210 BPI |
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Recording Capacity | 79 characters |
| 40 characters | 107 characters |
Number of data bits | 7 |
| 5 | 7 |
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Card Thickness |
| .76 mm +/- 0.08 mm |
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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
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 |
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| Description |
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| ESC M n1n2 | 1 | CR (CR = Carriage Return) or | Read Track1 only |
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| ESC m n1n2 | 1 | CR (CR = Carriage Return) |
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| ESC M n1n2 | 2 | CR or ESC m n1n2 | 2 | CR | Read Track2 only |
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| ESC M n1n2 | 3 | CR or ESC m n1n2 | 3 | CR | Read Track3 only |
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| ESC M n1n2 | 4 | CR or ESC m n1n2 | 4 | CR | Read Track1 and Track2 simultaneously |
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| ESC M n1n2 | 5 | CR or ESC m n1n2 | 5 | CR | Read Track2 and Track3 simultaneously |
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| ESC M n1n2 | 6 | CR or ESC m n1n2 | 6 | CR | Read Tracks 1,2 and 3 simultaneously |
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| 31 |
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