Hitachi SJ Series User Manual page 509

Chapter 14
14.4.8 Writing and reading out to multiple
registers [17h]
• Write and read out to consecutive multiple registers.
Query:
No. Field Name
1 Slave address
2 Function code
3 Readout register starting address (high) *1)
4 Readout register starting address (low) *1)
5 The number of readout registers (high)
6 The number of readout registers (low)
7 Writing register starting address (high) *1)
8 Writing register starting address (low) *1)
9 The number of writing registers (high)
10 The number of writing registers (low)
11 Writing data bytes n
12 Writing data 1 (high)
13 Writing data 1 (low)
14 Writing data 2 (high)
15 Writing data 2 (low)
16 CRC-16 (high)
17 CRC-16 (low)
Response:
No. Field Name
1 Slave address
2 Function code
3 Readout data bytes n
4 Readout data 1 (high)
5 Readout data 1 (low)
6 Readout data 2 (high)
7 Readout data 2 (low)
8 CRC-16 (high)
9 CRC-16 (low)
!
*1) Note that the starting address of retention register is
one less than the register No. The value obtained by
subtracting one from the register No. is the register
address.
A
• When a writing and reading out to multiple registers
cannot be executed normally, see "3.9 Exceptional
Responses".
(Example) To the inverter with slave address "1", to write
50.00Hz for the output frequency setting [FA-01] and read
out output frequency monitor value [dA-01].
Example (Hex)
01
17
27
(Register address) = (register No.)
10
00
02
2A
(Register address) = (register No.)
F8
00
02
04
00
00
0000 1388h → 5000d → 50.00Hz
13
88
F4
86
Example (Hex)
01
17
04
00
00
0000 1388h → 5000d → 50.00Hz
13
88
F4
71
14-18
RS485 Communication
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