J38D01 - 30 -
Error codes
Only 3 error codes are used:
01: illegal function code
02: illegal address
10: write protection (attempt to write a read_only register)
Data types
Each register consists of 16 bits (2 bytes)
If the data type is a byte, only the low byte will contain valid data. High byte is don’t care.
For data type longer than 16 bits, consecutive registers are used. The least significant
register comes first.
Register definitions
Write single register is only used for changing channel to calculate harmonics. Thus only
register 1 is writable.
9.2 MODBUS REGISTERS
ADDRE
SS
NAME
DESCRIPTION
LENGTH R/W TYPE
X
40001
Channel
Channel for harmonic calculation
16 BIT
R/W unsigned word
1
40002
1. Harmonic
1. harmonic of selected channel (%)
16 BIT
R-O unsigned word
0.01
40003
3. Harmonic
3. harmonic of selected channel (%)
16 BIT
R-O unsigned word
0.01
40004
5. Harmonic
5. harmonic of selected channel (%)
16 BIT
R-O unsigned word
0.01
40005
7. Harmonic
7. harmonic of selected channel (%)
16 BIT
R-O unsigned word
0.01
40006
9. Harmonic
9. harmonic of selected channel (%)
16 BIT
R-O unsigned word
0.01
40007
11. Harmonic 11. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40008
13. Harmonic 13. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40009
15. Harmonic 15. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40010
17. Harmonic 17. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40011
19. Harmonic 19. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40012
21. Harmonic 21. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40013
23. Harmonic 23. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40014
25. Harmonic 25. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40015
27. Harmonic 27. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40016
29. Harmonic 29. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40017
31. Harmonic 31. harmonic of selected channel (%) 16 BIT
R-O unsigned word
0.01
40018
Warnings [1]
Warnings Register 1 (See Warnings)
16 BIT
R-O unsigned word
1
40019
Warnings [2]
Warnings Register 1 (See Warnings)
16 BIT
R-O unsigned word
1
40020
Warnings [3]
Warnings Register 1 (See Warnings)
16 BIT
R-O unsigned word
1
40021
Warnings [4]
Warnings Register 1 (See Warnings)
16 BIT
R-O unsigned word
1
40022
Warnings [5]
Warnings Register 1 (See Warnings)
16 BIT
R-O unsigned word
1
