Danfoss VLT Compressor Drive CDS 803 Design Manual page 61

RS485 Installation and Set-...
Modbus telegram. Coil 127 decimal is addressed as coil
007Ehex (126 decimal).
Holding register 40001 is addressed as register 0000 in the
data address field of the telegram. The function code field
already specifies a holding register operation. Therefore,
the 4XXXX reference is implicit. Holding register 40108 is
addressed as register 006Bhex (107 decimal).
Coil Description
number
1–16 Frequency converter control word
(see Table 7.16).
17–32 Frequency converter speed or
setpoint reference range 0x0–
0xFFFF (-200% ... ~200%).
33–48 Frequency converter status word
(see Table 7.17).
49–64 Open-loop mode: Frequency
converter output frequency.
Closed-loop mode: Frequency
converter feedback signal.
Parameter write control (master to
slave).
0 = Parameter changes are written
to the RAM of the frequency
65
converter.
1 = Parameter changes are written
to the RAM and EEPROM of the
frequency converter.
66–65536 Reserved.
Table 7.15 Coil Register
Coil 0
01 Preset reference lsb
02 Preset reference msb
03 DC brake
04 Coast stop
05 Quick stop
06 Freeze frequency
07 Ramp stop
08 No reset
09 No jog
10 Ramp 1
11 Data not valid
12 Relay 1 off
13 Relay 2 off
14 Set up lsb
15 –
16 No reversing
Table 7.16 Frequency Converter Control Word (FC Profile)
MG18N202
Design Guide
Signal
direction
Master to slave
Master to slave
Slave to master
Slave to master
Master to slave
–
1
No DC brake
No coast stop
No quick stop
No freeze frequency
Start
Reset
Jog
Ramp 2
Data valid
Relay 1 on
Relay 2 on
Reversing
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Coil 0
33 Control not ready
34 Frequency converter not
ready
35 Coast stop
36 No alarm
37 Not used
38 Not used
39 Not used
40 No warning
41 Not at reference
42 Hand mode
43 Out of frequency range
44 Stopped
45 Not used
46 No voltage warning
47 Not in current limit
48 No thermal warning
Table 7.17 Frequency Converter Status Word (FC Profile)
1
Control ready
Frequency converter ready
Safety closed
Alarm
Not used
Not used
Not used
Warning
At reference
Auto mode
In frequency range
Running
Not used
Voltage warning
Current limit
Thermal warning
59
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