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7.5. Parameter access method
Parameter access is allowed by using nviParamCmd and nvoParamResp network variables. The
structure format is shown in below table.
Field Length Description
learn 1 byte
Command
2 (LN_LEARN_VALUE) : Write
3 (LN_REPORT_VALUE) : Read
selector 2 bytes
Parameter address (unsigned value)
value[0] 1 byte
0 at successful
0xFF at occurred error
value[1] 1 byte
0
value[2] 1 byte
The most significant 2 hex bytes of data
value[3] 1 byte
The least significant 2 hex bytes of data
day ,hour, minute,
second, millisecond
Total
7 bytes
N/A
- Example 1: Read access
A controller node reads the value of Trip code (address FC90). Now,
ol1 trip (trip code is 13
decimal) occurs. The value is 000D hex. The controller node sends/receives the following data.
Field
Send (nviParamCmd) Receive (nviParamResp)
learn
LN_REPORT_VALUE LN_REPORT_VALUE
selector
FC90 hex FC90 hex
value[0]
N/A 0
value[1]
N/A 0
value[2]
N/A 00 hex
value[3]
N/A 0D hex
day ,hour, minute,
second, millisecond
N/A 0
- Example 2: Write access
The controller node writes cumulative energy clear command (address FA20). The data value is
0002 hex. The controller node sends/receives the following data.
Field Send (nviParamCmd) Receive (nviParamResp)
learn LN_LEARN_VALUE LN_LEARN_VALUE
selector FA20 hex FA20 hex
value[0] 00 hex 00 hex
value[1] 00 hex 00 hex
value[2] 00 hex 00 hex
value[3] 02 hex 02 hex
day ,hour, minute,
second, millisecond
N/A 0
N.B.: After sending cumulative energy clear command, 0000 hex should be re-written into FA20.
