Omron KM50 Communications Manual page 30

Example 2: One less than the last address is specified as the read start address and 13
elements is specified (0D hex).
Read start address →
Read end address →
The number of elements exceeds the specification range, so only the data to the last
address in the area is read.
(3) Response code
• Normal Completion
Response code
0000
• Error Completion
Response code
1001
1002
1101
1103
110B
1100
● Communications Example for Read Parameter Area
The CT ratio is set to 150:5 (for a 5-A CT) and the low cut current is set to 1.0%. Here, these two
settings are read with one command.
Service Request PDU
0 2 0 1 C 0 0 0 0 0 0 4 8 0 0 2
MRC SRC Parameter
type
Service Response PDU
0 2 0 1 0 0 0 0 C 0 0 0 0 0 0 4 8 0 0 2
Response
MRC SRC
code
0 0 0 0 0 0 9 6 0 0 0 0 0 0 0 A
Section 3 CompoWay/F Communications Data specifies 0000 0001 to 0000 270F hex for the set
value/monitor value for the rated primary current. A value of 96 hex is 150 decimal, so the current
is 150 A.
Section 3 CompoWay/F Communications Data specifies 0000 0001 to 0000 00C7 hex for the
low-cut current. A value of A hex is 10 decimal, so the low-cut current is 1.0% (there is always one
place below the decimal point).
Address
****
****
Name
Normal completion
Error name
Command too long
Command too short
Area type error
Start address out-of-range
error
Response too long
Parameter error
Read start
address
Parameter Read start
type address
Rated Primary Current
2. 3 Detailed Descriptions of Services
Parameter Area
********
********
← Last address
Description
No errors were detected.
Cause
The command is too long.
The command is too short.
The area type (variable or parameter) is
wrong.
The read start address is out of range.
The number of elements exceeds the
maximum value.
Bit position is not 00.
No. of elements
(Reads two parameter values.)
No. of
elements
Low-cut Current
2-11