Vacon CX Series - Default Chapter; Table of Contents

VACON CX Modbus user’s manual Page 2
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INDEX
1. GENERAL............................................................................................................................................3
2. SPECIFICATIONS................................................................................................................................4
3. MODBUS.............................................................................................................................................5
3.1 General ...........................................................................................................................................5
3.2 Modbus frames ................................................................................................................................6
3.3 Modbus functions .............................................................................................................................6
3.4 Error detection .................................................................................................................................6
3.5 Exception responses ........................................................................................................................7
4. INSTALLATION ...................................................................................................................................8
5. CONNECTIONS.................................................................................................................................. 10
5.1 Board layout .................................................................................................................................. 10
5.2 Modbus connections....................................................................................................................... 10
5.3 I/O-control connections ................................................................................................................... 11
6. COMMISSIONING.............................................................................................................................. 12
7. MODBUS-VACON CX INTERFACE...................................................................................................... 13
7.1 Modbus function codes ................................................................................................................... 13
7.1.1 Function code 1, Read Control Bits.......................................................................................... 13
7.1.2 Function code 2, Read Status Bits........................................................................................... 13
7.1.3 Function code 3, Read Parameters .......................................................................................... 13
7.1.4 Function code 4, Read Variables ............................................................................................. 14
7.1.5 Function code 5, Write Control Bits.......................................................................................... 14
7.1.6 Function code 6, Write Parameter............................................................................................ 14
7.1.7 Function code 8, Diagnostic.................................................................................................... 14
7.2 VACON control interface................................................................................................................. 16
7.3 VACON parameters........................................................................................................................ 17
7.3.1 Frequency reference............................................................................................................... 17
7.3.2 Monitoring variables ................................................................................................................ 17
7.3.3 Active Fault Code................................................................................................................... 18
7.3.4 Parameter Write and Read...................................................................................................... 19
7.4 CONNECTIONS (small Modbus Board for Vacon CXS, Vacon CX211OPT)........................................... 20
7.4.1 Board layout .......................................................................................................................... 20
7.4.2 Modbus connections............................................................................................................... 20
7.5 Installation of CX211OPT in Vacon CXS drives................................................................................... 21