Ecom CP 400 Operating Instructions Manual page 23

Common Commands
Standard commands used by most devices. These commands always begin with an "*".
For example: *IDN?
tells the calibrator to return its identification.
Query Commands
Commands that ask for information, they always end with a "?".
For example: FUNC?
Returns the current modes of the calibrator displays.
Compound Commands
Commands that contain more than one command on one line. For example;
RTD_TYPE PT385_00;RTD_TYPE?
Sets the calibrator to RTD type PT385_00 and queries it to verify. It will return:
PT385_00
11.4.2 Character Processing
The data entered into the calibrator is processed as follows:
- ASCII characters are discarded if their decimal equivalent is less than 32 (space),
except 0 (LF) and 3 (CR):
- Data is taken as 7-bit ASCII
- The most significant data bit is ignored.
- Upper or lower case is acceptable.
11.4.3 Response Data Types
The data returned by the calibrator can be divided into four types:
Integer
For most computers and controllers they are decimal numbers ranging from -32768 to 32768.
For example: FAULT? could return 0
Refer to the Error Codes table (Table 8) for more information on error codes.
Floating
Floating numbers have up to 5 significant figures and exponents.
For example: CPRT_COEFA? returns 3.908300E-03
Character Response Data (CRD)
Data returned as keywords.
For example: RTD_TYPE? returns PT385_00
Indefinite ASCII (IAD)
Any ASCII characters followed by a terminator.
For example: *IDN? returns BETA, 32, 250, .00
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