Advantech ADAM 4100 User Manual page 71

4.4.20
$AA9SNNNN
CJC Offset Calibration
Name
Calibrates an analog input module to adjust for offset errors
Description
of its CJC (Cold Junction Compensation) sensors.
$AA9SNNNN(number of counts)(cr).
Syntax
$ is a delimiter character.
AA (range 00-FF) represents the 2-character hexadecimal
address which contains the CJC Status you wish to retrieve.
9 is CJC Status command.
S sign, + or -, indicates whether to increase or decrease the
CJC offset value.
NNNN(number of counts) a four character hexadecimal
"count" value. Each count equals approximately to 0.009°
C. The value can range from 0000 to FFFF.
(cr) is the terminating character, carriage return (0Dh).
!AA(cr) if the command is valid.
Response
?AA(cr) if an invalid command was issued.
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 indicating that a valid command
was received.
? is a delimiter character indicating that the command was
invalid.
AA (range 00-FF) represents the 2-character hexadecimal
address of an analog input module.
(cr) is the terminating character, carriage return (0Dh).
command:
Example
response:
The command increases the CJC offset value of the analog
input module at address 07h with 66 counts (42 hex) which
is also about 0.6° C.
NOTICE: An analog input module requires a maximum of 2 seconds to
perform auto calibration and ranging after it received an JC
Calibration command. During this interval, the module can
not be addressed to perform any other actions.
$079+0042(cr)
!07(cr)
Chapter 4
4
Chapter
Command Set 4-31