Coil
0
1
33
Control not ready
Control ready
34
Frequency converter not
ready
Frequency converter ready
35
Coasting stop
Safety closed
36
No alarm
Alarm
37
Not used
Not used
38
Not used
Not used
39
Not used
Not used
40
No warning
Warning
41
Not at reference
At reference
42
Hand mode
Auto mode
43
Out of frequency range
In frequency range
44
Stopped
Running
45
Not used
Not used
46
No voltage warning
Voltage warning
47
Not in current limit
Current limit
48
No thermal warning
Thermal warning
Table 3.36 Frequency Converter Status Word (FC Profile)
Register
number
Description
00001–00006 Reserved
00007
Last error code from an FC data object interface
00008
Reserved
00009
Parameter index
1)
00010–00990 000 parameter group (parameters 0-01 through
0-99)
01000–01990 100 parameter group (parameters 1-00 through
1-99)
02000–02990 200 parameter group (parameters 2-00 through
2-99)
03000–03990 300 parameter group (parameters 3-00 through
3-99)
04000–04990 400 parameter group (parameters 4-00 through
4-99)
...
...
49000–49990 4900 parameter group (parameters 49-00 through
49-99)
50000
Input data: Frequency converter control word
register (CTW).
50010
Input data: Bus reference register (REF).
...
...
50200
Output data: Frequency converter status word
register (STW).
50210
Output data: Frequency converter main actual
value register (MAV).
Table 3.37 Holding Registers
1) Used to specify the index number to be used when accessing an
indexed parameter.
3.9.10.9 How to Control the Frequency
Converter
Codes available for use in the function and data fields of a
Modbus RTU message are listed in
chapter 3.9.10.10 Function Codes Supported by Modbus RTU
and
chapter 3.9.10.11 Modbus Exception Codes
.
3.9.10.10 Function Codes Supported by
Modbus RTU
Modbus RTU supports use of the function codes (see
) in the function field of a message.
Function
Function code (hex)
Read coils
1
Read holding registers
3
Write single coil
5
Write single register
6
Write multiple coils
F
Write multiple registers
10
Get communication event counter
B
Report slave ID
11
Table 3.38 Function Codes
Function
Function
code
Subfunction
code
Subfunction
Diagnostics 8
1
Restart communication
2
Return diagnostic register
10
Clear counters and
diagnostic register
11
Return bus message
count
12
Return bus communi-
cation error count
13
Return slave error count
14
Return slave message
count
Table 3.39 Function Codes and Subfunction Codes
System Integration
Design Guide
MG16G202
Danfoss A/S © 08/2015 All rights reserved.
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