Crystal nVision Lab Reference Manual do Utilizador descarregar pdf (Página 9)

Module Queries and Commands  7

nVision Programming Instructions

Acknowledgement of a Command

The nVision always returns some indication to let you know a command or query was received and acted on. The return code for a command is eight

hexadecimal digits.

After the query or command the nVision will give the following responses:

Query:

[

answer to query]|[error code]

Command:

|[error code]

General Error Codes

The error code can give you valuable information and can be broken down as follows:

Form: ABBCCCCC

A BB CCCCC

Error/Success Section Error/Status Code

When |00000000 is returned you have successfully communicated with the nVision.

A- Error/Success

0 = Success

8 = Error

Note: All other values have a reserved meaning.

BB- Section

00 = Success

01 = Microprocessor

02 = Chassis

03 = Module

Note: All other values have a reserved meaning.

CCCCC- Error/Status Code (represented as hexadecimal values)

00000 = Success

00001 = General (unspecied error)

00006 = Zero limit exceeded

00008 = Changes not allowed while administrator password is set

0000F = Command not supported

00100 = Message from PC too long (max of 254 characters) or command is too long–Run Tag max length is 22 characters

00102 = Command not found

00105 = Incorrect number of parameters for the command

00106 = Module requested is not present

00107 = Parameter is not valid for the command

0010C = Chassis in not in the correct state to accept the command

00200 = Parameter is out of range for the command

Note: All other values have a reserved meaning.

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Crystal nVision Lab Reference Manual do Utilizador Página 9