User manual

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ID TECH EzWriter

< (3CH) Set Temporary Write Current

FORMAT 4-byte command – Command character ([), is followed by three ASCII

number characters (0 thru 9) representing the write current used for encoding.

ACTION The unit performs the following sequence: Change the write current setting

RAM to the specified value. Valid values are 000 to 255 only. Any other values outside

this range gets a “*” reply from the unit. If not a VC unit, then a “~” reply is sent from the

unit. Transmit Command acknowledge (“^” 5EH). This command may be sent anytime

prior to an “Arm to Write” command.

Notes In USI0 there is a 5-second inter-character timeout

On Power-up/Reset the unit sets the write current to the default value read from the on-

board EEPROM. The temporary value is lost.

Recommended values:

Typical low coercivity (~300 Oersted) setting = 036

Typical high coercivity (4140 Oersted) setting = 255

This is an AMC compatible command. EzWriter only supports either low or high

coercivity, all settings above 170 is high coercivity; otherwise, EzWriter is set to

low coercivity operation.

> (3EH) Review Temporary Write Current

ACTION The unit returns a 3 ASCII character response representing the temporary

write current setting stored in RAM, MSD first. If not a VC unit, then a “~” reply is sent

from the unit.

Note The value returned is the value presently used to encode cards with. This value

could be different from the default write current value stored in EEPROM.

Arm to Write Commands: Use these commands to write cards.

ASCII Char Definition of Instruction

@ (40H) Arm to Write with RAW verification

ACTION The unit performs the following sequence: Check that valid write data exists

in Encode Data storage buffer. Send “*” error if not. Else, Clear read buffers; Transmit

Command acknowledge (“^” 5EH); Wait for card swipe. Transmit acknowledge (“^” 5EH)

after card swipe if card passes the Read After Write checks on all tracks that were

encoded. Otherwise send the proper RAW (1, 2 and/or 3) error response. After a “Arm to

Write” command is received and acknowledged the only valid commands that are

accepted for execution are: “Abort” <ESC> and “Warm Reset” <DEL> commands. All

other commands result in an “Invalid Command” “!” response.