Advantech Data Acquisition Modules ADAM 4000 - Manual (Page 267)

Digital I/O and Relay Output
Counter/Frequency Command Set
7-32 ADAM 4000 Series User’s Manual
$AAF
Name Read Version command
Description The command requests the analog input module at address
AA to return the version code of its firmware.
Syntax $AAF (cr)
$ is a delimiter character.
AA (range 00-FF) represents the 2-character hexadecimal
address that you will access to.
F is the Read Version command.
(cr) is the terminating character, carriage return (0Dh).
Response !AA(Version)(cr) if the command is valid.
There is no response if the module detects a syntax or
communication error, or even if the specified address does
not exist.
! is a delimiter character which indicates a valid command.
AA (range 00-FF) represents the 2-character hexadecimal
address of the module.
(Version) is the version code of the module's firmware at
address AA.
(cr) is the terminating character, carriage return (0Dh).
4080, 4080D