User manual

Page 16 of 61

MS246 User Manual

7.4 Reader Reset Command

02 49 03 48

The reader supports a reset reader command. This allows the host to return the

reader to its default state.

Response is as follows:

7.5 OPOS/JPOS Command

There are three forms of the command:

02 4D 01 30 03 7D Enter Standard Mode (Exit OPOS Mode)

02 4D 01 31 03 7C Enter OPOS Mode

02 4D 01 32 03 7F Enter JPOS Mode

Response is as follows:

17 Reader already in OPOS Mode

15 Command failure (wrong length or wrong parameter)

06 Success

7.6 Arm/Disarm to Read Command

Arm to read:

02 50 01 30 03 LRC

This command enables the MSR to be ready for a card swipe in buffered mode.

Any previously read data will be erased and reader will wait for the next swipe.

As the user swipes a card, the data will be saved, but will not be sent to the host.

The reader holds the data until receiving the next “Arm to Read” or “MSR Reset”

command.

Disarm to read:

02 50 01 32 03 LRC

This command will disable MSR read and clear any magnetic data in buffered

mode. The reader enters to a disarmed state and will ignore MSR data.

Response is as follows:

Other possible response statuses:

NAK 'P' command length must be 1.

NAK 'P' command must be 0x30 or 0x32.

NAK Reader not configured for buffered mode.

NAK Reader not configured for magstripe read.