Operating instructions

VLT
®
2800, VLT
®
6000 HVAC and VLT
®
8000 AQUA Modbus RTU
Appendix A
- Examples
Modbus message string:
[01] [0F] [00] [00] [00] [20] [04] [3C] [04] [00] [00] [89] [19]
[3C]+[04]: Stop Command: 000001000111100 = 043C
HEX
(reversed)
(See Control Word Bit Descriptions)
Speed Command: 0%
Message returned to Modbus master from Modbus RTU
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 + 7
Slave
Address
Function Coil Addr HI Coil Addr LO No. of Coils HI No. of Coils LO Error Check
01 0F 00 00 00 20 [54] [13]
All values are in hexadecimal.
■ EXAMPLE 3: Coast Stop Motor
Message sent to Modbus RTU from Modbus master
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7
Slave
Address
Function Coil Addr HI Coil Addr
LO
No. of Coils
HI
No. of Coils
LO
Byte Count ForceDateHI
Coils (0-7)
01 0F 00 00 00 20 04 20
By
te 8
By
te 9
By
te 10
By
te 11+12
For
ce Data
LO
Coils (8-15)
For
ce Data HI
Coils (16-23)
For
ce Data
LO
Coils (24-31)
Err
or Check
04 00 00 [0E] [81]
Modbus message string:
[01] [0F] [00] [00] [00] [20] [20] [2C] [00] [00] [--]
[20]+[2C]: Coast Command: 0010110000100000 = 2C20
HEX
(reversed)
(See Control Word Bit Descriptions)
Speed Command: 0%
Message returned to Modbus master from Modbus RTU
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 + 7
Slave
Addres
s
Function Coil Addr HI Coil Addr LO No. of Coils HI No. of Coils LO Error Check
01 0F 00 00 00 20 [54] [13
]
All values are in hexadecimal.
MG.10.S2.02 - VLT is a registered Danfoss trademark
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