MagTek MagneSafe V5 - Manual (Page 81)

Section 2. Communications
73
Request Data: None
Response Data:
Offset Field Name Description
0 Device Serial # 16 bytes, if DSN is shorter than 15 bytes, left justify
and fill with binary zeroes. At least one byte (usually
the last one) must contain binary zero.
16 Actual Encryption
Counter This three byte field returns the current value of the
Encryption Counter.
Result codes: 0x00 Success
0x02 Invalid length
Example Get Encryption Counter Request (Hex):
Cmd Num Data Len Data
1C 00
Example Get Encryption Counter Response (Hex) - Encryption Counter is 2033:
Result Code Data Len Data
00 13 54455354205345545550203030303100
0007F1
Power Down Command (Wireless USB Reader Only)
Command number: 0x28
Description: This command is used to power down the magnetic stripe circuit. If the
reader is running on battery only (no USB cable attached), the entire
reader is powered down. The behavior of the reader is exactly the same as
if the user had pressed and held down the User Switch for three seconds to
turn it off.
Data structure:
Request Data: None
Response Data: None
Result codes: 0x00 Success
Example Power Down Request (Hex):
Cmd Num Data Len Data
28 00
Example Power Down Response (Hex):
Result Code Data Len Data
00 00