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8 Communications Functions
8 - 14
Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
z
Response
*1. For a broadcast, no response will be sent back.
*2. Note that the coil address is 0000, which is 1 less than the coil number 0001: Coil address = Coil number - 1.
If the Write to Coil function is not executed normally, refer to
8-5-9 Exception Response
on page 8-20.
Writes data to the specified holding register.
Because the holding registers for the Output Frequency Setting/Monitor (F001) have a data resolution
of 0.01 Hz, to set 50.00 Hz, set the written data to 5000 (1388 hex).
z
Query
Precautions for Correct Use
Some parameter data, such as the Output Frequency Setting/Monitor (F001), 1st/2nd Multi-step
Speed Reference 0 (A020/A220), Multi-step Speed Reference 1 to 15 (A021 to A035), 1st/2nd
Acceleration Time 1 (F002/A202), and 1st/2nd Deceleration Time 1 (F003/A203), occupy two
registers. In Modbus communication, handle these parameters as follows:
• For reading/writing data from/to an MSB register, use the Read/Write from/to Multiple Holding
Registers function to read/write data from/to two registers at the same time.
Attempting to read/write data from/to only the MSB register results in an error and you will
receive an exception response.
• For an LSB register, however, attempts to read/write from/to only a single register will be pro-
cessed successfully. The MSB register data remains intact in this case.
No.
Field name
Example
[hex]
1
Slave address
*1
01
2
Function code
05
3
Coil address (MSB)
*2
00
4
Coil address (LSB)
*2
00
5
Written data (MSB)
FF
6
Written data (LSB)
00
7
CRC-16 (MSB)
8C
8
CRC-16 (LSB)
3 A
8-5-4
Write to Holding Register [06 hex]
Example. Writing 50.00 Hz to Inverter with Slave Address 1 as Out-
put Frequency Setting Value (F001
=
A020)
No.
Field name
Example
[hex]
1
Slave address
*1
01
2
Function code
06
3
Register address (MSB)
*2
00
4
Register address (LSB)
*2
01
5
Written data (MSB)
13
6
Written data (LSB)
88
7
CRC-16 (MSB)
D5
8
CRC-16 (LSB)
5C
(Register address) = (Register number)
−
1
1388 hex
→
5000 dec
→
50.00 Hz
Summary of Contents for SYSDRIVE MX2 SERIES
Page 1: ...Multi function Compact Inverter MX2 Series Type V1 User s Manual I585 E1 01 3G3MX2 A V1 ...
Page 32: ...CONTENTS 29 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 108: ...2 Design 2 48 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 176: ...4 Parameter List 4 42 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 538: ...10 Troubleshooting 10 22 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 598: ...12 Options 12 50 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 614: ...Appendices A 16 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 615: ...I 1 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 I Index ...