Hitachi CONVENTION 14 Instruction Manual page 255

B − 12
B 12
The data set in the response is as follows:
Response Buffer
Register Number
Register Data
Trip data
Response Buffer
Register Number
Register Data
Trip data
When the Read Holding Register command cannot be executed normally, refer to the
exception response.
Write in Coil [05h]:
This function writes data in a single coil. Coil status changes are as follows:
Change data (high order)
Change data (low order)
An example follows (note that to command the inverter, set A002=03):
Sending a RUN command to an inverter having slave address "8"
This example writes in coil number "1."
Query:
No.
1
2
3
4
5
6
7
8
Note 1:
Note 2:
When writing in a selected coil fails, see the exception response.
12+0 (high
order)
0003h
Trip factor (E03)
12+3 (high
order)
00h
Not used
Data
Field Name
Slave address *1
Function code
Coil start address *2
(high order)
Coil start address *2
(low order)
Change data
(high order)
Change data
(low order)
CRC-16 (high order)
CRC-16 (low order)
No response is made for a broadcasting query.
The PDU Coils are addressed starting at zero. Therefore coils numbered 1-31
are addressed as 0-30. Coil address value (transmitted on Modbus line) is 1
less than the Coil Number.
4-5
12+0 12+1
(low (high
order) order)
00h
Not used
10-11
12+3 12+4
(low (high
order) order)
00h
Output current (3.0A)
Coil Status
OFF to ON
FFh
00h
Response:
Example
No.
(Hex)
08 1 Slave address
05 2 Function code
00 3 Coil start address *2
(high order)
00 4 Coil start address *2
(low order)
FF 5 Change data
(high order)
00 6 Change data
(low order)
8C 7 CRC-16 (high order)
A3 8 CRC-16 (low order)
6-7
12+1 (low 12+2
order) (high
order)
00h
Frequency (9.9Hz)
12-13
12+4 (low 12+5
order) (high
order)
001Eh
DC-bus voltage (284V)
ON to OFF
00h
00h
Example
Field Name
(Hex)
08
05
00
00
FF
00
8C
A3
8-9
12+2 (low
order)
0063h
14-15
12+5 (low
order)
011Ch