Specifying Variable Names In Request Paths - Omron NY532-5400 User Manual

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Specifying Variable Names in Request Paths

Variable Names
A variable name is specified as a symbolic segment (ANSI extended symbol segment).
Variable Name Specification Format
BYTE 91 hex
BYTE Length in BYTE
Array of :
octet
Variable_name
:
Octet (pad)
Variable Names
Variable names are encoded in UTF-8.
Structure Member Names
Structure member names are specified in the same way as variable names. (Store UTF-8 character
codes in the ANSI extended symbol segment.)
Array Indices
Specify the array index in a logical segment that is set as a member ID. You can specify an array index
([x]) in a variable name.
Specification Method 1: 8-bit Index
BYTE 28 hex
USINT Index
Specification Method 2: 16-bit Index
BYTE 29 hex
octet 00 hex
UINT Index
Range Specifications with the Num of Element Field
There is a Num of Element field in the request data for the variable read and variable write services.
You can use these services to access the specified range of an array with the following specifications.
• Specify the first element in the range of elements to access in the array variable as the variable to
read or write.
• Specify the number of elements to access in the Num of Element field.
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ANSI Extended Symbol Segment
Length of variable name in bytes
Variable name encoded in UTF-8
00 hex. One byte is padded if the variable name
length is an odd number of bytes.
Logical Segment (Member ID)
Array index from 0 to 255
Logical Segment (Member ID)
Pad
(L) Array index from 0 to 65,535
(H)
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