VACON CX
Modbus user’s manual
Page
2
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Vacon Oy
Phone +358-201-2121
Fax: +358-201-212 205
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
