Yokogawa Touch Screen GP20 - Manual (Page 67)

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IM 04L51B01-17EN
Commands and Responses
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2
App
2.9 Responses to Commands
This section explains the responses that GX/GP returns in response to commands. There
are three types of responses: affirmative response, negative response, and data output
response.
2.9.1 Affirmative Response (For commands other than output request
commands)
If the GX/GP successfully completes the processing of a received command that is not an
output request command, it returns an affirmative response.
Syntax
E0CRLF
“CRLF” is the terminator that the GX/GP uses. “CRLF” will be used in the explanation of the
syntax. In the response examples, “CRLF” will be omitted.
2.9.2 Negative Response
If a command syntax error, setting error, or other error occurs, the GX/GP returns a negative
response.
Syntax
E1,p,p,•••,pCRLF
p Error number and the position of error occurrence
The detailed format of p is indicated below. The GX/GP outputs the error number, the
position of the command where the error occurred, and the position of the parameter
where the error occurred, each separated by a colon.
en:cp:pp
en Error number.
cp A value indicating the command position where the error occurred. The
position is numbered in order with the first command as 1. For a single
command, the GX/GP outputs 1.
pp A value indicating the parameter position where the error occurred. The
position is numbered in order with the first parameter in each command
as 1. For errors that pertain to the entire command (for example, error in
the command name), the GX/GP outputs 0.
If errors occur in multiple parameters, the GX/GP outputs numbers
separated by commas in ascending order.
Response Example 1
If error number 3 occurs in the second parameter of a single command, the GX/GP outputs:
E1,3:1:2
Response Example 2
If error number 1 occurs in the third parameter and error number 100 occurs in the fifth
parameter of a single command, the GX/GP outputs:
E1,1:1:3,100:1:5