Danfoss VLT HVAC Basic Drive FC 101

Name: Danfoss VLT HVAC Basic Drive FC 101
Brand: Danfoss
SKU: 99485d5d-bff8-4aa0-9206-076247758701

HVAC frequency converter for fans, pumps and compressors, over built-in Modbus RTU.

The Danfoss VLT HVAC Basic Drive FC 101 is a frequency converter that controls the speed of fans, pumps and compressors in buildings. This Modbus RTU template reads frequency, current, power, temperature, energy and alarms, and lets you start, stop and set the speed, ramps, limits and PI setpoints from ModbusCloud.

Protocol: Modbus RTU
Connection: RS485, 19200 baud
Registers: 488, read and write

Brand: Danfoss
Key readings: Output frequency · Motor current · Motor voltage · Motor power · DC link voltage · Heat sink temperature · kWh counter · Alarm word
Available commands: Control word · Speed reference · PI setpoint · Ramp up and ramp down time · Motor speed limits · Drive parameters
Compatible models: VLT HVAC Basic Drive FC 101
Last updated: 8 October 2026

Registers (488)

455 read, 368 write

Name	Unit	Access
16-01 Reference [Unit]		Read
16-02 Reference [%]	%	Read
16-03 Status Word		Read
16-05 Main Actual Value [%]	%	Read
16-09 Custom Readout		Read
16-10 Power [kW]	kW	Read
16-11 Power [hp]		Read
16-12 Motor Voltage	V	Read
16-13 Frequency	Hz	Read
16-14 Motor Current	A	Read
16-15 Frequency [%]	%	Read
16-16 Torque [Nm]	Nm	Read
16-17 Speed [RPM]	rpm	Read
16-18 Motor Thermal	%	Read
16-22 Torque [%]	%	Read
16-26 Power Filtered [kW]	kW	Read
16-27 Power Filtered [hp]		Read
16-30 DC Link Voltage	V	Read
16-34 Heat Sink Temp.	°C	Read
16-35 Inverter Thermal	%	Read
16-36 Inv. Nom. Current	A	Read
16-37 Inv. Max. Current	A	Read
16-38 SL Controller State		Read
16-50 External Reference	%	Read
16-52 Feedback [Unit]		Read
16-54 Feedback 1 [Unit]		Read
16-55 Feedback 2 [Unit]		Read
16-56 Feedback 3 [Unit]		Read
16-60 Digital Input		Read
16-61 Terminal 53 Setting		Read
16-62 Analog Input 53		Read
16-63 Terminal 54 Setting		Read
16-64 Analog Input 54		Read
16-65 Analog Output 42 [mA]	mA	Read
16-66 Digital Output		Read
16-67 Pulse Input 29 [Hz]		Read
16-71 Relay Output		Read
16-72 Counter A		Read
16-73 Counter B		Read
16-79 Analog Output 45 [mA]	mA	Read
16-86 FC Port REF 1		Read
16-90 Alarm Word		Read
16-91 Alarm Word 2		Read
16-92 Warning Word		Read
16-93 Warning Word 2		Read
16-94 Ext. Status Word		Read
16-95 Ext. Status Word 2		Read
16-97 Alarm Word 3		Read
16-98 Warning Word 3		Read
18-10 FireMode Log:Event		Read
18-50 Sensorless Readout [unit]		Read
18-87 Inv. Max. Current	A	Read
18-88 Motor Current	A	Read
18-90 Process PID Error	%	Read
18-91 Process PID Output	%	Read
18-92 Process PID Clamped Output	%	Read
18-93 Process PID Gain Scaled Output	%	Read
Status Word Coil Control Ready		Read
Status Word Coil Drive Ready		Read
Status Word Coil Coasting Stop		Read
Status Word Coil Alarm		Read
Status Word Coil Not Used 37		Read
Status Word Coil Not Used 38		Read
Status Word Coil Not Used 39		Read
Status Word Coil Warning		Read
Status Word Coil At Reference		Read
Status Word Coil Auto Mode		Read
Status Word Coil In Frequency Range		Read
Status Word Coil Running		Read
Status Word Coil Not Used 45		Read
Status Word Coil Voltage Warning		Read
Status Word Coil Current Limit		Read
Status Word Coil Thermal Warning		Read
Output Frequency Coil Bit 0		Read
Output Frequency Coil Bit 1		Read
Output Frequency Coil Bit 2		Read
Output Frequency Coil Bit 3		Read
Output Frequency Coil Bit 4		Read
Output Frequency Coil Bit 5		Read
Output Frequency Coil Bit 6		Read
Output Frequency Coil Bit 7		Read
Output Frequency Coil Bit 8		Read
Output Frequency Coil Bit 9		Read
Output Frequency Coil Bit 10		Read
Output Frequency Coil Bit 11		Read
Output Frequency Coil Bit 12		Read
Output Frequency Coil Bit 13		Read
Output Frequency Coil Bit 14		Read
Output Frequency Coil Bit 15		Read
Parameter Write Control		Write
Control Word Coil Preset Reference LSB		Write
Control Word Coil Preset Reference MSB		Write
Control Word Coil DC Brake		Write
Control Word Coil Coast Stop		Write
Control Word Coil Quick Stop		Write
Control Word Coil Freeze Frequency		Write
Control Word Coil Ramp Stop or Start		Write
Control Word Coil Reset		Write
Control Word Coil Jog		Write
Control Word Coil Ramp 1 or 2		Write
Control Word Coil Data Valid		Write
Control Word Coil Relay 1		Write
Control Word Coil Relay 2		Write
Control Word Coil Setup LSB		Write
Control Word Coil Bit 14		Write
Control Word Coil Reversing		Write
Speed Reference Coil Bit 0		Write
Speed Reference Coil Bit 1		Write
Speed Reference Coil Bit 2		Write
Speed Reference Coil Bit 3		Write
Speed Reference Coil Bit 4		Write
Speed Reference Coil Bit 5		Write
Speed Reference Coil Bit 6		Write
Speed Reference Coil Bit 7		Write
Speed Reference Coil Bit 8		Write
Speed Reference Coil Bit 9		Write
Speed Reference Coil Bit 10		Write
Speed Reference Coil Bit 11		Write
Speed Reference Coil Bit 12		Write
Speed Reference Coil Bit 13		Write
Speed Reference Coil Bit 14		Write
Speed Reference Coil Bit 15		Write
0-01 Language		Read and write
Modbus Conf		Read and write
Last Error Code		Read
Last Error Register		Read
Index Pointer		Read and write
0-03 Regional Settings		Read and write
0-04 Operating State at Power-up		Read and write
0-06 GridType		Read and write
0-07 Auto DC Braking		Read and write
0-10 Active Set-up		Read and write
0-11 Programming Set-up		Read and write
0-12 Link Setups		Read and write
0-30 Custom Readout Unit		Read and write
0-31 Custom Readout Min Value		Read and write
0-32 Custom Readout Max Value		Read and write
0-37 Display Text 1		Read and write
0-38 Display Text 2		Read and write
0-39 Display Text 3		Read and write
0-40 [Hand on] Key on LCP		Read and write
0-42 [Auto on] Key on LCP		Read and write
0-44 [Off/Reset] Key on LCP		Read and write
0-50 LCP Copy		Read and write
0-51 Set-up Copy		Read and write
0-60 Main Menu Password		Read and write
0-61 Access to Main Menu w/o Password		Read and write
1-00 Configuration Mode		Read and write
1-01 Motor Control Principle		Read and write
1-03 Torque Characteristics		Read and write
1-06 Clockwise Direction		Read and write
1-08 Motor Control Bandwidth		Read and write
1-10 Motor Construction		Read and write
1-14 Damping Gain	%	Read and write
1-15 Low Speed Filter Time Const.	s	Read and write
1-16 High Speed Filter Time Const.	s	Read and write
1-17 Voltage Filter Time Const.	s	Read and write
1-20 Motor Power		Read and write
1-22 Motor Voltage	V	Read and write
1-23 Motor Frequency	Hz	Read and write
1-24 Motor Current	A	Read and write
1-25 Motor Nominal Speed	rpm	Read and write
1-26 Motor Cont. Rated Torque	Nm	Read and write
1-29 Automatic Motor Adaption (AMA)		Read and write
1-30 Stator Resistance (Rs)	Ω	Read and write
1-31 Rotor Resistance (Rr)	Ω	Read and write
1-33 Stator Leakage Reactance (X1)	Ω	Read and write
1-35 Main Reactance (Xh)	Ω	Read and write
1-37 d-axis Inductance (Ld)		Read and write
1-38 q-axis Inductance (Lq)		Read and write
1-39 Motor Poles		Read and write
1-40 Back EMF at 1000 RPM	V	Read and write
1-42 Motor Cable Length	m	Read and write
1-43 Motor Cable Length Feet		Read and write
1-44 d-axis Inductance Sat. (LdSat)		Read and write
1-45 q-axis Inductance Sat. (LqSat)		Read and write
1-46 Position Detection Gain	%	Read and write
1-48 Current at Min Inductance for d-axis	%	Read and write
1-49 Current at Min Inductance for q-axis	%	Read and write
1-50 Motor Magnetization at Zero Speed	%	Read and write
1-52 Min Speed Normal Magnetizing [Hz]	Hz	Read and write
1-55 U/f Characteristic - U	V	Read and write
1-56 U/f Characteristic - F	Hz	Read and write
1-60 Low Speed Load Compensation	%	Read and write
1-61 High Speed Load Compensation	%	Read and write
1-62 Slip Compensation	%	Read and write
1-63 Slip Compensation Time Constant	s	Read and write
1-64 Resonance Dampening	%	Read and write
1-65 Resonance Dampening Time Constant	s	Read and write
1-66 Min. Current at Low Speed	%	Read and write
1-70 Start Mode		Read and write
1-71 Start Delay	s	Read and write
1-72 Start Function		Read and write
1-73 Flying Start		Read and write
1-78 Compressor Start Max Speed [Hz]	Hz	Read and write
1-79 Compressor Start Max Time to Trip	s	Read and write
1-80 Function at Stop		Read and write
1-82 Min Speed for Function at Stop [Hz]	Hz	Read and write
1-87 Trip Speed Low [Hz]	Hz	Read and write
1-88 AC Brake Gain		Read and write
1-90 Motor Thermal Protection		Read and write
1-93 Thermistor Source		Read and write
2-00 DC Hold/Motor Preheat Current	%	Read and write
2-01 DC Brake Current	%	Read and write
2-02 DC Braking Time	s	Read and write
2-04 DC Brake Cut In Speed	Hz	Read and write
2-06 Parking Current	%	Read and write
2-07 Parking Time	s	Read and write
2-10 Brake Function		Read and write
2-16 AC Brake, Max Current	%	Read and write
2-17 Overvoltage Control		Read and write
2-19 Overvoltage Gain	%	Read and write
3-02 Minimum Reference		Read and write
3-03 Maximum Reference		Read and write
3-04 Reference Function		Read and write
3-10 Preset Reference	%	Read and write
3-11 Jog Speed [Hz]	Hz	Read and write
3-13 Reference Site		Read and write
3-14 Preset Relative Reference	%	Read and write
3-15 Reference 1 Source		Read and write
3-16 Reference 2 Source		Read and write
3-17 Reference 3 Source		Read and write
3-41 Ramp 1 Ramp Up Time	s	Read and write
3-42 Ramp 1 Ramp Down Time	s	Read and write
3-51 Ramp 2 Ramp Up Time	s	Read and write
3-52 Ramp 2 Ramp Down Time	s	Read and write
3-80 Jog Ramp Time	s	Read and write
3-81 Quick Stop Ramp Time	s	Read and write
3-82 Starting Ramp Up Time	s	Read and write
4-10 Motor Speed Direction		Read and write
4-12 Motor Speed Low Limit [Hz]	Hz	Read and write
4-14 Motor Speed High Limit [Hz]	Hz	Read and write
4-18 Current Limit	%	Read and write
4-19 Max Output Frequency	Hz	Read and write
4-40 Warning Freq. Low	Hz	Read and write
4-41 Warning Freq. High	Hz	Read and write
4-50 Warning Current Low	A	Read and write
4-51 Warning Current High	A	Read and write
4-54 Warning Reference Low		Read and write
4-55 Warning Reference High		Read and write
4-56 Warning Feedback Low		Read and write
4-57 Warning Feedback High		Read and write
4-58 Missing Motor Phase Function		Read and write
4-61 Bypass Speed From [Hz]	Hz	Read and write
4-63 Bypass Speed To [Hz]	Hz	Read and write
4-64 Semi-Auto Bypass Set-up		Read and write
5-00 Digital Input Mode		Read and write
5-03 Digital Input 29 Mode		Read and write
5-10 Terminal 18 Digital Input		Read and write
5-11 Terminal 19 Digital Input		Read and write
5-12 Terminal 27 Digital Input		Read and write
5-13 Terminal 29 Digital Input		Read and write
5-40 Function Relay		Read and write
5-41 On Delay, Relay	s	Read and write
5-42 Off Delay, Relay	s	Read and write
5-50 Term. 29 Low Frequency	Hz	Read and write
5-51 Term. 29 High Frequency	Hz	Read and write
5-52 Term. 29 Low Ref./Feedb. Value		Read and write
5-53 Term. 29 High Ref./Feedb. Value		Read and write
5-54 Term. 29 Pulse Filter Time Constant	ms	Read and write
5-80 AHF Cap Reconnect Delay	s	Read and write
5-90 Digital & Relay Bus Control		Read and write
6-00 Live Zero Timeout Time	s	Read and write
6-01 Live Zero Timeout Function		Read and write
6-02 Fire Mode Live Zero Timeout Function		Read and write
6-10 Terminal 53 Low Voltage	V	Read and write
6-11 Terminal 53 High Voltage	V	Read and write
6-12 Terminal 53 Low Current	mA	Read and write
6-13 Terminal 53 High Current	mA	Read and write
6-14 Terminal 53 Low Ref./Feedb. Value		Read and write
6-15 Terminal 53 High Ref./Feedb. Value		Read and write
6-16 Terminal 53 Filter Time Constant	s	Read and write
6-19 Terminal 53 mode		Read and write
6-20 Terminal 54 Low Voltage	V	Read and write
6-21 Terminal 54 High Voltage	V	Read and write
6-22 Terminal 54 Low Current	mA	Read and write
6-23 Terminal 54 High Current	mA	Read and write
6-24 Terminal 54 Low Ref./Feedb. Value		Read and write
6-25 Terminal 54 High Ref./Feedb. Value		Read and write
6-26 Terminal 54 Filter Time Constant	s	Read and write
6-29 Terminal 54 Mode		Read and write
6-70 Terminal 45 Mode		Read and write
6-71 Terminal 45 Analog Output		Read and write
6-72 Terminal 45 Digital Output		Read and write
6-73 Terminal 45 Output Min Scale	%	Read and write
6-74 Terminal 45 Output Max Scale	%	Read and write
6-76 Terminal 45 Output Bus Control		Read and write
6-90 Terminal 42 Mode		Read and write
6-91 Terminal 42 Analog Output		Read and write
6-92 Terminal 42 Digital Output		Read and write
6-93 Terminal 42 Output Min Scale	%	Read and write
6-94 Terminal 42 Output Max Scale	%	Read and write
6-96 Terminal 42 Output Bus Control		Read and write
6-98 Drive Type		Read and write
8-01 Control Site		Read and write
8-02 Control Source		Read and write
8-03 Control Timeout Time	s	Read and write
8-04 Control Timeout Function		Read and write
8-30 Protocol		Read and write
8-31 Address		Read and write
8-32 Baud Rate		Read and write
8-33 Parity/Stop Bits		Read and write
8-35 Minimum Response Delay		Read and write
8-36 Maximum Response Delay	s	Read and write
8-37 Maximum Inter-char Delay	s	Read and write
8-42 PCD Write Configuration		Read and write
8-43 PCD Read Configuration		Read and write
8-44 PCD User Define		Read and write
8-50 Coasting Select		Read and write
8-51 Quick Stop Select		Read and write
8-52 DC Brake Select		Read and write
8-53 Start Select		Read and write
8-54 Reversing Select		Read and write
8-55 Set-up Select		Read and write
8-56 Preset Reference Select		Read and write
8-70 BACnet Device Instance		Read and write
8-72 MS/TP Max Masters		Read and write
8-73 MS/TP Max Info Frames		Read and write
8-74 "I am" Service		Read and write
8-75 Initialization Password		Read and write
8-79 Protocol Firmware version		Read and write
8-80 Bus Message Count		Read and write
8-81 Bus Error Count		Read and write
8-82 Slave Messages Rcvd		Read and write
8-83 Slave Error Count		Read and write
8-84 Slave Messages Sent		Read and write
8-85 Slave Timeout Errors		Read and write
8-88 Reset FC port Diagnostics		Read and write
8-94 Bus Feedback 1		Read and write
8-95 Bus Feedback 2		Read and write
13-00 SL Controller Mode		Read and write
13-01 Start Event		Read and write
13-02 Stop Event		Read and write
13-03 Reset SLC		Read and write
13-10 Comparator Operand		Read and write
13-11 Comparator Operator		Read and write
13-12 Comparator Value		Read and write
13-20 SL Controller Timer	s	Read and write
13-40 Logic Rule Boolean 1		Read and write
13-41 Logic Rule Operator 1		Read and write
13-42 Logic Rule Boolean 2		Read and write
13-43 Logic Rule Operator 2		Read and write
13-44 Logic Rule Boolean 3		Read and write
13-51 SL Controller Event		Read and write
13-52 SL Controller Action		Read and write
14-01 Switching Frequency		Read and write
14-03 Overmodulation		Read and write
14-07 Dead Time Compensation Level		Read and write
14-08 Damping Gain Factor	%	Read and write
14-09 Dead Time Bias Current Level	%	Read and write
14-10 Mains Failure		Read and write
14-11 Mains Fault Voltage Level	V	Read and write
14-12 Response to Mains Imbalance		Read and write
14-15 Kin. Back-up Trip Recovery Level		Read and write
14-20 Reset Mode		Read and write
14-21 Automatic Restart Time	s	Read and write
14-22 Operation Mode		Read and write
14-23 Typecode Setting		Read and write
14-24 Trip Delay at Current Limit	s	Read and write
14-27 Action At Inverter Fault		Read and write
14-28 Production Settings		Read and write
14-29 Service Code		Read and write
14-30 Current Lim Ctrl, Proportional Gain	%	Read and write
14-31 Current Lim Ctrl, Integration Time	s	Read and write
14-32 Current Lim Ctrl, Filter Time	ms	Read and write
14-40 VT Level	%	Read and write
14-41 AEO Minimum Magnetization	%	Read and write
14-50 RFI Filter		Read and write
14-51 DC-Link Voltage Compensation		Read and write
14-52 Fan Control		Read and write
14-53 Fan Monitor		Read and write
14-55 Output Filter		Read and write
14-61 Function at Inverter Overload		Read and write
14-63 Min Switch Frequency		Read and write
14-64 Dead Time Compensation Zero Current Level		Read and write
14-65 Speed Derate Dead Time Compensation	Hz	Read and write
14-90 Fault Level		Read and write
15-00 Operating Hours	h	Read
20-00 Feedback 1 Source		Read and write
20-01 Feedback 1 Conversion		Read and write
20-03 Feedback 2 Source		Read and write
20-04 Feedback 2 Conversion		Read and write
20-06 Feedback 3 Source		Read and write
20-07 Feedback 3 Conversion		Read and write
20-12 Reference/Feedback Unit		Read and write
20-20 Feedback Function		Read and write
20-21 Setpoint 1		Read and write
20-60 Sensorless Unit		Read and write
20-69 Sensorless Information		Read
20-81 PI Normal/Inverse Control		Read and write
20-83 PI Start Speed [Hz]	Hz	Read and write
20-84 On Reference Bandwidth	%	Read and write
20-91 PI Anti Windup		Read and write
20-93 PI Proportional Gain		Read and write
20-94 PI Integral Time	s	Read and write
20-97 PI Feed Forward Factor	%	Read and write
22-01 Power Filter Time	s	Read and write
22-02 Sleepmode CL Control Mode		Read and write
22-04 Check Valve Monitor		Read and write
22-23 No-Flow Function		Read and write
22-24 No-Flow Delay	s	Read and write
22-26 Dry Pump Function		Read and write
22-27 Dry Pump Delay	s	Read and write
22-30 No-Flow Power	kW	Read and write
22-31 Power Correction Factor	%	Read and write
22-33 Low Speed [Hz]	Hz	Read and write
22-34 Low Speed Power [kW]	kW	Read and write
22-37 High Speed [Hz]	Hz	Read and write
22-38 High Speed Power [kW]	kW	Read and write
22-40 Minimum Run Time	s	Read and write
22-41 Minimum Sleep Time	s	Read and write
22-43 Wake-Up Speed [Hz]		Read and write
22-44 Wake-Up Ref./FB Diff	%	Read and write
22-45 Setpoint Boost	%	Read and write
22-46 Maximum Boost Time	s	Read and write
22-47 Sleep Speed [Hz]		Read and write
22-48 Sleep Delay Time	s	Read and write
22-49 Wake-Up Delay Time	s	Read and write
22-50 End of Curve Function		Read and write
22-51 End of Curve Delay	s	Read and write
22-60 Broken Belt Function		Read and write
22-61 Broken Belt Torque	%	Read and write
22-62 Broken Belt Delay	s	Read and write
22-80 Flow Compensation		Read and write
22-81 Square-linear Curve Approximation	%	Read and write
22-82 Work Point Calculation		Read and write
22-84 Speed at No-Flow [Hz]	Hz	Read and write
22-86 Speed at Design Point [Hz]	Hz	Read and write
22-87 Pressure at No-Flow Speed		Read and write
22-88 Pressure at Rated Speed		Read and write
22-89 Flow at Design Point		Read and write
22-90 Flow at Rated Speed		Read and write
23-05 Interval Between Operation	min	Read and write
23-06 Running Time	s	Read and write
23-07 Running Speed and Direction	Hz	Read and write
24-00 FM Function		Read and write
24-01 Fire Mode Configuration		Read and write
24-03 Fire Mode Min Reference		Read and write
24-04 Fire Mode Max Reference		Read and write
24-05 FM Preset Reference	%	Read and write
24-06 Fire Mode Reference Source		Read and write
24-07 Fire Mode Feedback Source		Read and write
24-08 Mul FM Preset Reference	%	Read and write
24-09 FM Alarm Handling		Read and write
24-10 Drive Bypass Function		Read and write
24-11 Drive Bypass Delay Time	s	Read and write
24-90 Missing Motor Function		Read and write
24-91 Missing Motor Coefficient 1		Read and write
24-92 Missing Motor Coefficient 2		Read and write
24-93 Missing Motor Coefficient 3		Read and write
24-94 Missing Motor Coefficient 4		Read and write
24-95 Locked Rotor Function		Read and write
24-96 Locked Rotor Coefficient 1		Read and write
24-97 Locked Rotor Coefficient 2		Read and write
24-98 Locked Rotor Coefficient 3		Read and write
24-99 Locked Rotor Coefficient 4		Read and write
30-22 Locked Rotor Protection		Read and write
30-23 Locked Rotor Detection Time [s]	s	Read and write
30-58 LockPassword		Read and write
15-01 Running Hours	h	Read
15-02 kWh Counter	kWh	Read
15-03 Power Up's		Read
15-04 Over Temp's		Read
15-05 Overvolt's		Read
15-06 Reset kWh Counter		Read and write
15-07 Reset Running Hours Counter		Read and write
15-30 Alarm Log: Error Code		Read
15-31 InternalFaultReason		Read
15-32 Alarm Log: Time	s	Read
15-40 FC Type		Read
15-41 Power Section		Read
15-42 Voltage		Read
15-43 Software Version		Read
15-44 Ordered TypeCode		Read
15-45 Actual Typecode String		Read
15-46 Drive Ordering No		Read
15-48 LCP Id No		Read
15-49 SW ID Control Card		Read
15-50 SW ID Power Card		Read
15-51 Drive Serial Number		Read
15-52 OEM Information		Read
15-53 Power Card Serial Number		Read
15-57 File Version		Read
15-59 Filename		Read
15-92 Defined Parameters		Read
15-97 Application Type		Read
15-98 Drive Identification		Read
16-00 Control Word		Read

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If a device is not in the library yet, we build the template for free as soon as we have the register data.

Use cases

Show output frequency, motor current and power of every fan and pump drive on a ModbusCloud dashboard.
Get an email alert when the alarm word is no longer 0 or the heat sink temperature passes a limit.
Keep 365 days of kWh counter and running hours history to compare consumption per fan or pump.
Change the PI setpoint of a pressure or temperature loop remotely without visiting the plant room.
Start, stop or change the speed of a fan from an automation on a time schedule or the energy price.

Installation

Connect terminals 68 (P+) and 69 (N-) of the drive to RS485 A and B on the ModbusCloud Gateway and terminate the bus at both ends, on the drive with dip switch S801.
Set 8-30 Protocol to Modbus RTU, then 8-31 Address, 8-32 Baud Rate and 8-33 Parity/Stop Bits.
For control over Modbus, set 8-01 Control Site and 8-02 Control Source to the FC port, and 3-15 Reference 1 Source to Local bus reference.
In ModbusCloud, add a Modbus device (RTU) with the same address and serial settings, for example 1, 19200 baud, 8E1, and import this template.
Check that output frequency and motor current match the display of the drive.

Things to watch for

The drive does not answer. What should I check?

Check that 8-30 is set to Modbus RTU and that address, baud rate and parity in 8-31 to 8-33 match the device in ModbusCloud. Changing the protocol can change the baud rate, so check 8-32 again. Then swap A and B and check the termination switch S801.

Why does a 32-bit value look wrong?

Many readouts, such as frequency, power and motor voltage, are 32-bit values over two registers with the high word first. The template reads them that way. If you read only the first register, you get the high word, which is usually 0.

How do I read one element of an array parameter?

Array parameters such as 3-10 Preset Reference or 5-40 Function Relay share one address. Write the index to holding register 9 first; all following reads and writes of array parameters then go to that element.

What should I keep in mind when writing parameters or the control word?

Coil 65 decides whether parameter writes go to RAM only (0) or also to EEPROM (1); keep it at 0 for values you change often. The control word and bus reference only act when 8-01, 8-02 and 3-15 allow it. Change motor data and limits only when you know the installation.

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