Yokogawa Touch Screen GP20 - Manual (Page 17)

2-3
IM 04L51B01-17EN
Commands and Responses
1
2
App
Parameters
Parameters are characteristic values that are attached to commands.
Notes on Writing Parameters
• Write parameters in their appropriate order.
• Spaces around and in the middle of parameters are ignored. Exception is the character
strings that users specify.
• You can omit the setting command parameters that do not need to be changed from their
current settings. If you omit parameters, write only the delimiters.
Example: SRangeAI,0001,,,,,1800,0 terminator
• If parameters are omitted and there are multiple delimiters at the end of the command,
those delimiters can be omitted.
Example: SRangeAI,0001,VOLT,2V,,,,terminator -> SRangeAI,0001,VOLT,
2Vterminator
There are two types of parameters: predefined expressions and user-defined character
strings.
How to Write User-Defined Character Strings (Parameters)
• Enclose user-defined character strings in single quotation marks.
Example The command for setting the channel 0001 tag to “SYSTEM1” is shown
below.
STagIO,0001,'SYSTEM1'
• There are two types of user-defined character strings depending on the type of characters
that can be used.
Character Strings Consisting Only of Characters in the ASCII Code Range (0x00 to
0x7f)
In this manual, applicable parameters are indicated with “ASCII.”
Example p3 Tag number (up to 16 characters, ASCII)
You can use alphanumeric characters and some of the symbols. For the ASCII characters
that you can use, see appendix 1.
Character Strings Consisting of Characters in the UTF-8 Code Range
In this manual, applicable parameters are indicated with “UTF-8.”
Example p2 Tag (up to 32 characters, UTF-8)
UTF-8 codes include ASCII codes. You can use UTF-8 characters, including the ASCII
characters above. For the ASCII characters that you can use, see appendix 1.
Delimiters
Commas are used as delimiters.
Sub delimiters
Semicolons are used as sub delimiters.
Terminators
“CR+LF” is used as a terminator, meaning “CR” followed by “LF.” Expressed in ASCII code, it
is 0x0d0x0a.
2.1 Command Transmission and GX20 Responses