81
83503001 Rev G
Query Format:
Send two bytes of unreadable characters. First:
Byte 1 = 1010 1010 = AA hex
Byte 2 = 000x xxxx
(where xxxxx is the address of the supply in binary)
Query Response:
The power supply returns 5 characters:
First a “1” = 31 hex if Multi-drop is enabled
or a “0” = 30 hex if Multi-drop is not enabled
Then four printable characters:
Dollar sign “$”
Checksum (two ASCII hex characters) = “30” or “31”
Carriage-return terminator
7.9.2. Fast Read Registers
This query allows fast polling of the status and error registers for many power supplies
on a RS-232/485 link. It is useful for checking many supplies to verify they are all
operating as expected.
Query Format:
Send two bytes of unreadable characters. First:
100x xxxx
(where xxxxx is the address of the supply in binary)
And send it a second time:
100x xxxx
(send 2 characters sequentially)
Query Response:
The power supply returns 16 characters including the contents of the status and
fault registers (see section TBD and Figure TBD).
First twelve bytes contain binary data from six registers:
STAT? SENA? SEVE? FLT? FENA? FEVE?
Then four printable characters:
Dollar sign “$”
Checksum (two ASCII hex characters)
Carriage-return terminator
7.9.3. Read Power-On Time
This query allows you to read how many minutes the power supply has been running
since it was built. The accuracy, in minutes, is not guaranteed for time critical
applications.
Query Format:
Send two bytes of unreadable characters. First:
Byte 1 = 1010 0110 = A6 hex
Byte 2 = 000x xxxx
(where xxxxx is the address of the supply in binary)
Query Response:
The power supply returns 12 characters:
First is the minutes as a 32 Bit integer as 8 ASCII Hex bytes
Then four printable characters:
Dollar sign “$”
Checksum (two ASCII hex characters) = “30” or “31”
Carriage-return terminator
