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8 - 1
Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
8
This section describes the general-purpose serial communications functions (Modbus
communication).
8-1 Communications Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
8-2 RS485 Terminal Arrangement and Connection . . . . . . . . . . . . . . . . . . . . . . 8-4
8-3 Modbus Communication Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
8-4 Modbus Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
8-4-1
Message Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7
8-4-2
Required Communications Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
8-4-3
Normal Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
8-4-4
Abnormal Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
8-4-5
No Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
8-5 Explanation of Each Function Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
8-5-1
Read Coil Status [01 hex] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-11
8-5-2
Read from Holding Register [03 hex] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12
8-5-3
Write to Coil [05 hex] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-13
8-5-4
Write to Holding Register [06 hex] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14
8-5-5
Loop-back Test [08 hex] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15
8-5-6
Write to Multiple Coils [0F hex] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16
8-5-7
Write to Multiple Holding Registers [10 hex] . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18
8-5-8
Read/Write from/to Multiple Holding Registers [17h] . . . . . . . . . . . . . . . . . . . 8-19
8-5-9
Exception Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-20
8-6 Saving a Change to Holding Register (Enter Command) . . . . . . . . . . . . . 8-21
8-6-1
How to Issue Enter Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-21
8-6-2
EEPROM Write Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-23
8-7 Modbus Mapping Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24
8-7-1
Operation of Modbus Mapping Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-24
8-7-2
Modbus Mapping Function Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-25
8-7-3
Compressed Single-word Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-26
8-7-4
Troubleshooting for Modbus Mapping Function . . . . . . . . . . . . . . . . . . . . . . . 8-28
8-7-5
Endian Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-29
8-8 Co-inverter Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-31
8-8-1
Co-inverter Communication Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-32
8-8-2
Co-inverter Communication Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-35
Communications Functions
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 ...