Vacon 100 HVAC, User Manual

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6
6.3.3.9 Fault history
The fault history can be viewed by reading from address 40401 onward. The faults are listed in
chronological order so that the latest fault is mentioned first and the oldest last. The fault history
can contain 29 faults at the same time. The fault history contents are represented as follows.
Table 36. Fault history
6.4 Example messages
Example 1
In this example the speed reference of the drive is set to 50% and the drive is commanded to run.
The Process Data IN registers 2001…2003 are written to achieve this. The data to the control word
is 0001h (run request) and the data to the speed reference is 1388h (5000d). The Modbus function
used to write the values is 16 (Write Multiple Registers).
Write the process data 42001…42003 with command 16 (Preset Multiple Registers).
Command Master - Slave:
Address Register Purpose
40401 440401
40402 440402
40403 440403
... ...
40429 440429
Table 37.
ADDRESS 01 hex Slave address 1 hex (= 1)
FUNCTION 10 hex Function 10 hex (= 16)
DATA Starting address HI 07 hex Starting address 07D0 hex (= 2000)
Starting address LO D0 hex
No. of registers HI 00 hex
No. of registers LO 03 hex Number of registers 0003 hex (= 3)
Byte count 06 hex Byte count 06 hex (= 6)
Data HI 00 hex Data 1 = 0001 hex (= 1). Setting control word run bit to 1.
Data LO 01 hex
Data HI 00 hex Data 2 = 0000 hex (= 0).
Data LO 00 hex
Data HI 13 hex Data 3 = 1388 hex (= 5000), Speed Reference to 50.00%
Data LO 88 hex
ERROR CRC HI C8 hex CRC field C8CB hex (= 51403)
CHECK CRC LO CB hex