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How to access TR200 parameters
User-defined Network Variables UNVT
UNVT Parameter Structure
Two special User-defined Network Variables (UNVT) have been defined to enable access to TR200 parameters
via LonWorks:
Variable name:
nviParamRequest
nvoParamResponse
The parameter or attribute request has the following structure:
UNVT_param_request
Field
Request
Par_number
Subindex
Value
The parameter or attribute response has the following structure:
Field
Response
Par_number
Length
Value
Parameter or parameter attribute value
If an incorrect read or write request is encountered, an error message will be returned in the [Value] field, byte
0 and byte 3.
Error description:
Invalid request type
Invalid parameter number
Invalid data type
No write access
Exceed limits
Invalid subindex
Not array
Only reset
Not changeable
Not in this mode
No bus access
Other error
TR200 LonWorks
Range
1 = Read value
2 = Write value
Parameter number
Subindex (0-255)
Parameter value
UNVT_param_response
Range
0 = Error response
1 = Read response
2 = Write response
Parameter number
Length of "value" field (0–27)
Error code in Value [0]:
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
UNVT type:
UNVT_param_request
UNVT_param_response
Type
Enum
Unsigned long
Unsigned
Unsigned quad
Type
Enum
Unsigned long
Unsigned
Unsigned
Error code in Value [3]:
Size
1 byte
2 bytes
1 byte
4 bytes
Size
1 byte
2 bytes
1 byte
0–27 bytes
1
2
3
4
5
6
7
8
9
10
11
0xFE
7-1
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