
SIEPYEUOQ2A01G AC Drive Q2A Technical Manual
233
6.2
Modbus Communications
This section gives detailed information about the parameters, error codes and communication procedures for
Modbus communications.
◆
Configure Master/Slave
You can use the Modbus protocol for serial communication with programmable controllers (PLC).
The Modbus communication uses one master (PLC) and a maximum of 31 slave drives. Serial communications
usually starts with a signal from the master to the slave drives.
A slave drive that receives a command from the master does the specified function and then sends a response back
to the master. You must set the address number for each slave drive before you start signal communications to
make sure that the master uses the correct address numbers.
A - Master (PLC)
B - Slave (drive)
Figure 6.1 PLC and Drive Connection Example
◆
Communication Specifications
Table 6.2 Modbus Specifications
Item
Specification
Interface
RS-485
Synchronization method
Asynchronous (start-stop synchronization)
Communication parameter
Communications speed: 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 76.8, 115.2 kbps
Data length: 8 bit (fixed)
Parity: even, odd, none
Stop bit 1 bit (fixed)
Communication protocol
Modbus standard (RTU mode only)
Number of possible units to connect
Maximum: 31 units
◆
Communication with the PLC
This section gives information about the settings for the termination resistor and how to connect to Modbus
communications. Modbus communications uses an RS-485 interface (2-wire sequence).
■
Connect Communications Cable
Use this procedure to start communication between the PLC and drive.
Содержание Q2A
Страница 2: ...This Page Intentionally Blank 2 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 12: ...12 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 18: ...i 2 Legal Information 18 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 28: ...1 2 Features and Advantages of Control Methods 28 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 64: ...2 9 Installation Methods 64 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 166: ...4 9 Test Run Checklist 166 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 172: ...5 2 European Standards 172 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 173: ...Standards Compliance 5 5 2 European Standards SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 173...
Страница 174: ...5 2 European Standards 174 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 175: ...Standards Compliance 5 5 2 European Standards SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 175...
Страница 176: ...5 2 European Standards 176 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 258: ...6 2 Modbus Communications 258 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 356: ...8 7 Storage Guidelines 356 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 357: ...SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 357 9 Disposal 9 1 Safety Precautions 358 9 2 Disposal Instructions 359...
Страница 360: ...9 2 Disposal Instructions 360 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...
Страница 526: ...11 20 Parameters Changed by PM Motor Code Selection 526 SIEPYEUOQ2A01G AC Drive Q2A Technical Manual...