Danfoss VLT Soft Starter MCD 600 User manual

Installation Guide
Modbus RTU Card
VLT® Soft Starter MCD 600
vlt-drives.danfoss.com

1
1.1
1.2
1.3
2
2.1
3
3.1
3.2
4
4.1
4.2
4.3
4.3.1
4.3.2
4.4
5
5.1
5.2
5.3
5.4
5.5
5.5.1
5.5.2
5.6
5.7
5.8
6
6.1
6.2
6.3
7
7.1
Contents
Safety 5
Disclaimer 5
Warnings 5
Important User Information 5
Introduction 6
Compatibility 6
Installation 7
Installing the Expansion Card 7
Connecting to the Network 7
Operation 8
Prerequisites 8
Client Configuration 8
Configuration 8
Modbus Network Settings 8
Enabling Network Control 8
Feedback LEDs 8
Modbus Registers 9
PLC Configuration 9
Compatibility 9
Ensuring Safe and Successful Control 9
Parameter Management 9
Standard Mode 9
Command and Configuration Registers (Read/Write) 9
Status Reporting Registers (Read Only) 10
Examples 13
Trip Codes 13
Modbus Error Codes 15
Ground Fault Protection 16
Overview 16
Connect the CT to the Ground Fault Inputs 16
Configure Ground Fault Protection Settings 16
Specifications 17
Connections 17
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Contents
Modbus RTU Card
Installation Guide

7.2
7.3
Settings 17
Certification 17
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Contents
Modbus RTU Card
Installation Guide

-
-
-
1 Safety
1.1 Disclaimer
The examples and diagrams in this manual are included solely for illustrative purposes. The information contained in this manual is
subject to change at any time and without prior notice. Responsibility or liability is never accepted for direct, indirect, or consequen-
tial damage resulting from the use or application of this equipment.
1.2 Warnings
WARNING
SHOCK HAZARD
Attaching or removing accessories while the soft starter is connected to mains voltage may cause personal injury.
Before attaching or removing accessories, isolate the soft starter from mains voltage.
WARNING
RISK OF PERSONAL INJURY AND EQUIPMENT DAMAGE
Inserting foreign objects or touching the inside of the soft starter while the expansion port cover is open may endanger person-
nel and can damage the soft starter.
Do not insert foreign objects in the soft starter with the port cover open.
Do not touch the inside of the soft starter with the port cover open.
1.3 Important User Information
Observe all necessary safety precautions when controlling the soft starter remotely. Alert personnel that machinery may start with-
out warning.
The installer is responsible for following all instructions in this manual and for following correct electrical practice.
Use all internationally recognized standard practice for RS485 communication when installing and using this equipment.
AQ277154312778en-000201 / 175R1180 | 5Danfoss A/S © 2022.11
Safety
Modbus RTU Card
Installation Guide

•
•
2 Introduction
2.1 Compatibility
This communication expansion card is suitable for use with VLT® Soft Starter MCD 600.
The card is available in 2 versions:
175G0127: VLT® Soft Starter MCD 600 Modbus RTU Card
175G0027: VLT® Soft Starter MCD 600 Modbus RTU Card with Ground Fault Protection.
This manual is suitable for use with both versions.
This Installation Guide is intended for use with version 2.x of the VLT® Soft Starter MCD 600 Modbus RTU Card. Version 1.x of the
Modbus RTU Card does not support custom users, TCP connection, or IoT operation.
AQ277154312778en-000201 / 175R11806 | Danfoss A/S © 2022.11
Introduction
Modbus RTU Card
Installation Guide

1.
2.
3.
1.
2.
3 Installation
3.1 Installing the Expansion Card
Procedure
Push a small flat-bladed screwdriver into the slot in the center of the expansion port cover and ease the cover away from
the soft starter.
Line up the card with the expansion port.
Gently push the card along the guide rails until it clicks into the soft starter.
Example
1 2
e77ha739.10
Illustration 1: Installation of the Expansion Card
3.2 Connecting to the Network
The expansion card must be installed in the soft starter.
Procedure
Restore control power.
Connect field wiring via the 5-way connector plug.
Example
35 4 2 1
e77ha741.10
Illustration 2: 5-way Connector Plug
Pin
Function
1, 2
Data A
3
Common
4, 5
Data B
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Installation
Modbus RTU Card
Installation Guide

4 Operation
4.1 Prerequisites
The Modbus RTU Card must be controlled by a Modbus client (such as a PLC) which complies with the Modbus Protocol Specifica-
tion. For successful operation, the client must also support all functions and interfaces described in this manual.
4.2 Client Configuration
For standard Modbus 11-bit transmission, configure the client for 2 stop bits with no parity and 1 stop bit for odd or even parity.
For 10-bit transmission, configure the client for 1 stop bit.
In all cases, the client baud rate and server address must match those set in parameters 12-1 to 12-4.
The data polling interval must be long enough for the module to respond. Short polling intervals may cause inconsistent or incor-
rect behavior, particularly when reading multiple registers. The recommended minimum polling interval is 300 ms.
4.3 Configuration
4.3.1 Modbus Network Settings
Set the network communication parameters for the card via the soft starter. For details on how to configure the soft starter, see the
VLT® Soft Starter MCD 600 Operating Guide.
Table 1: Parameter Settings
Parameter
Parameter name
Description
12-1
Modbus Address
Sets the Modbus RTU network address for the soft starter.
12-2
Modbus Baud Rate
Selects the baud rate for Modbus RTU communications.
12-3
Modbus Parity
Selects the parity for Modbus RTU communications.
12-4
Modbus Timeout
Selects the timeout for Modbus RTU communications.
4.3.2 Enabling Network Control
The soft starter only accepts commands from the expansion card if parameter 1-1 Command Source is set to Network.
NOTICE
If the reset input is active, the soft starter does not operate. If a reset switch is not required, fit a link across terminals RESET, COM+
on the soft starter.
4.4 Feedback LEDs
LED status
Description
Off
The soft starter is not powered up.
On
Communication active.
Flashing
Communication inactive.
NOTICE
If communication is inactive, the soft starter may trip on Network Communications. If parameter 6-13 Network Communications is
set to Soft Trip and Log or Trip Starter, the soft starter requires a reset.
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Operation
Modbus RTU Card
Installation Guide

•
•
5 Modbus Registers
5.1 PLC Configuration
Use the tables in 5.5 Standard Mode to map registers within the device to addresses within the PLC.
NOTICE
All references to registers mean the registers within the device unless otherwise stated.
5.2 Compatibility
The Modbus RTU Card supports 2 modes of operation:
In Standard Mode, the device uses registers defined in the Modbus Protocol Specification.
In Legacy Mode, the device uses the same registers as the clip-on Modbus Module supplied by Danfoss for use with older soft
starters. Some registers differ from those specified in the Modbus Protocol Specification.
5.3 Ensuring Safe and Successful Control
Data written to the device remains in its registers until the data is overwritten or the device is reinitialized.
If the soft starter should be controlled via parameter 7-1 Command Override or should be disabled via the reset input (terminals
RESET, COM+), fieldbus commands should be cleared from the registers. If a command is not cleared, it is resent to the soft starter
once fieldbus control resumes.
5.4 Parameter Management
Parameters can be read from and written to the soft starter. The Modbus RTU Card can read or write a maximum of 125 registers in 1
operation.
NOTICE
The total number of parameters in the soft starter may vary according to the model and parameter list of the soft starter. At-
tempting to write to a register not associated with a parameter returns an error code 02 (illegal data address). Read register 30602
to determine the total number of parameters in the soft starter.
NOTICE
Do not change the default values of the Advanced parameters (parameter group 20-** Advanced Parameters). Changing these val-
ues may cause unpredictable behavior in the soft starter.
5.5 Standard Mode
5.5.1 Command and Configuration Registers (Read/Write)
Table 2: Description of Read/Write Registers
Register
Description
Bits
Details
40001
Command (single write)
0–7
To send a command to the starter, write the required value:
00000000 = Stop
00000001 = Start
00000010 = Reset
00000100 = Quick stop (coast to stop)
00001000 = Forced communication trip
00010000 = Start using Parameter Set 1
00100000 = Start using Parameter Set 2
01000000 = Reserved
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Modbus Registers
Modbus RTU Card
Installation Guide

Register
Description
Bits
Details
10000000 = Reserved
8–14
Reserved
15
Must = 1
40002
Reserved
40003
Reserved
40004
Reserved
40005
Reserved
40006
Reserved
40007
Reserved
40008
Reserved
40009–40xxx
Parameter management (single
or multiple read/ write)
0–15
Manage soft starter programmable parameters. See the VLT® Soft Start-
er MCD 600 Operating Guide for a complete parameter list.
5.5.2 Status Reporting Registers (Read Only)
NOTICE
For models MCD6-0063B and smaller (soft starter model ID 1~4), the current and frequency reported via communications regis-
ters are 10 times greater than the actual value.
Table 3: Description of Read Registers
Register
Description
Bits
Details
30003
Reserved
30004
Reserved
30005
Reserved
30006
Reserved
30007
Reserved
30008
Reserved
30600
Version
0–5
Binary protocol version
6–8
Parameter list major version
9–15
Product type code: 15 = MCD 600
30601
Model number
0–7
Reserved
8–15
Soft starter model ID
30602
Changed parameter number
0–7
0 = No parameters have changed
1–255 = Index number of the last parameter changed
8–15
Total number of parameters available in the soft starter
AQ277154312778en-000201 / 175R118010 | Danfoss A/S © 2022.11
Modbus Registers
Modbus RTU Card
Installation Guide

Register
Description
Bits
Details
30603
Changed parameter value
0–15
Value of the last parameter that was changed, as indicated in register
30602
30604
Starter state
0–4
0 = Reserved
1 = Ready
2 = Starting
3 = Running
4 = Stopping
5 = Not ready (restart delay, restart temperature check, run simulation,
reset input is open)
6 = Tripped
7 = Programming mode
8 = Jog forward
9 = Jog reverse
5
1 = Warning
6
0 = Uninitialized
1 = Initialized
7
Command source
0 = Remote LCP, Digital Input, Clock
1 = Network
8
0 = Parameters have changed since last parameter read
1 = No parameters have changed
9
0 = Negative phase sequence
1 = Positive phase sequence
10–15
Reserved
30605
Current
0–13
Average rms current across all 3 phases
14–15
Reserved
30606
Current
0–9
Current (% motor FLC)
10–15
Reserved
30607
Motor temperature
0–7
Motor thermal model (%)
8–15
Reserved
30608
Power
0–11
Power
12–13
Power scale
0 = Multiply power by 10 to get W
1 = Multiply power by 100 to get W
2 = Power (kW)
3 = Multiply power by 10 to get kW
14–15
Reserved
30609
% Power factor
0–7
100% = power factor of 1
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Modbus Registers
Modbus RTU Card
Installation Guide

Register
Description
Bits
Details
8–15
Reserved
30610
Voltage
0–13
Average rms voltage across all 3 phases
14–15
Reserved
30611
Current
0–13
Phase 1 current (rms)
14–15
Reserved
30612
Current
0–13
Phase 2 current (rms)
14–15
Reserved
30613
Current
0–13
Phase 3 current (rms)
14–15
Reserved
30614
Voltage
0–13
Phase 1 voltage
14–15
Reserved
30615
Voltage
0–13
Phase 2 voltage
14–15
Reserved
30616
Voltage
0–13
Phase 3 voltage
14–15
Reserved
30617
Parameter list version number
0–7
Parameter list minor revision
8–15
Parameter list major version
30618
Digital input state
0–15
For all inputs, 0 = open, 1 = closed (shorted)
0 = Start/Stop
1 = Reserved
2 = Reset
3 = Input A
4 = Input B
5 to 15 = Reserved
30619
Trip code
0–15
See 5.7 Trip Codes
8–15
Reserved
30620
Reserved
30621
Frequency
0–15
Frequency (Hz)
30622
Ground current
0–15
Ground Current (A)
30623~30631
Reserved
NOTICE
Reading register 30603 (Changed parameter value) resets registers 30602 (Changed parameter number) and 30604 (Parameters
have changed). Always read registers 30602 and 30604 before reading register 30603.
AQ277154312778en-000201 / 175R118012 | Danfoss A/S © 2022.11
Modbus Registers
Modbus RTU Card
Installation Guide

5.6 Examples
Table 4: Command: Start
Message
Soft starter address
Function code
Register address
Data
CRC
In
20
06
40002
1
CRC1, CRC2
Out
20
06
40002
1
CRC1, CRC2
Table 5: Soft Starter State: Running
Message
Soft starter address
Function code
Register address
Data
CRC
In
20
03
40003
1
CRC1, CRC2
Out
20
03
2
xxxx0011
CRC1, CRC2
Table 6: Trip Code: Motor Overload
Message
Soft starter address
Function code
Register address
Data
CRC
In
20
03
40004
1
CRC1, CRC2
Out
20
03
2
00000010
CRC1, CRC2
Table 7: Download Parameter from Soft Starter - Read Parameter 5 (Parameter 1-5 Locked Rotor Current), 600%
Message
Soft starter address
Function code
Register
Data
CRC
In
20
03
40013
1
CRC1, CRC2
Out
20
03
2 (bytes)
600
CRC1, CRC2
Table 8: Upload Single Parameter to Soft Starter - Write Parameter 61 (Parameter 2-9 Stop Mode), set =1
Message
Soft starter address
Function code
Register
Data
CRC
In
20
06
40024
1
CRC1, CRC2
Out
20
06
40024
1
CRC1, CRC2
Table 9: Upload Multiple Parameters to Soft Starter - Write Parameters 9, 10, 11 (Parameters 2-2 to 2-4) Set to Values of 15 s, 300%, and 350%,
Respectively
Message
Soft starter address
Function code
Register
Data
CRC
In
20
16
40017, 3
15, 300, 350
CRC1, CRC2
Out
20
16
40017, 3
15, 300, 350
CRC1, CRC2
NOTICE
This function can only be used to upload consecutive parameters. The Register field indicates the number of parameters to be
uploaded and the register number of the 1st parameter.
5.7 Trip Codes
Code
Description
0
No trip
1
Excess start time
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Modbus Registers
Modbus RTU Card
Installation Guide

Code
Description
2
Motor overload
3
Motor thermistor
4
Current imbalance
5
Frequency
6
Phase sequence
7
Instantaneous overcurrent
8
Power loss
9
Undercurrent
10
Heatsink overtemperature
11
Motor connection
12
Input A trip
13
FLC too high
14
Unsupported option (function not available in inside delta)
15
Communications card fault
16
Forced network trip
17
Internal fault
18
Overvoltage
19
Undervoltage
23
Parameter out of range
24
Input B trip
26
L1 phase loss
27
L2 phase loss
28
L3 phase loss
29
L1-T1 shorted
30
L2-T2 shorted
31
L3-T3 shorted
33
Time-overcurrent (bypass overload)
34
SCR overtemperature
35
Battery/clock
36
Thermistor circuit
47
Overpower
48
Underpower
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Modbus Registers
Modbus RTU Card
Installation Guide

Code
Description
56
LCP disconnected
57
Zero speed detect
58
SCR itsm
59
Instantaneous overcurrent
60
Rating capacity
70
Current read err L1
71
Current read err L2
72
Current read err L3
73
Remove mains volts (mains voltage connected in run simulation)
74
Motor connection T1
75
Motor connection T2
76
Motor connection T3
77
Firing fail P1
78
Firing fail P2
79
Firing fail P3
80
VZC fail P1
81
VZC fail P2
82
VZC fail P3
83
Low control volts
84–96
Internal fault x. Contact the local supplier with the fault code (x).
5.8 Modbus Error Codes
Code
Description
Example
1
Illegal function code
The adapter or soft starter does not support the requested function.
2
Illegal data address
The adapter or soft starter does not support the specified register address.
3
Illegal data value
The adapter or soft starter does not support 1 of the received data values.
4
Slave device error
An error occurred while trying to perform the requested function.
6
Slave device busy
The adapter is busy (for example writing parameters to the soft starter).
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Modbus Registers
Modbus RTU Card
Installation Guide

1.
2.
3.
6 Ground Fault Protection
6.1 Overview
NOTICE
Ground fault protection is only available on ground fault enabled option cards with soft starters running a compatible version of
software. Contact the supplier for assistance.
The Modbus RTU Card can detect ground current and trip before the equipment is damaged.
Ground fault protection requires a 1000:1 or 2000:1 current transformer (not supplied). The CT should be rated 1 VA or 5 VA. The soft
starter can be configured to trip at 1–50 A. If ground fault current rises above 50 A, the soft starter trips immediately.
Parameter 40-3 Ground Fault Trip Active selects when ground fault protection is active.
6.2 Connect the CT to the Ground Fault Inputs
To use ground fault protection, a common-mode current transformer (CT) must be installed around all 3 phases.
Procedure
Use a 1000:1 or 2000:1 CT with a rating of 1 VA or 5 VA.
Set parameter 40-5 Ground Fault CT ratio to match the CT.
Connect the CT to the ground fault terminals (G1, G2, G3).
For maximum protection, the CT should be installed on the input side of the soft starter.
6.3 Configure Ground Fault Protection Settings
Ground fault protection settings must be set in the soft starter.
Parameter
Description
Parameter 40-1 Ground Fault Level
Sets the trip point for ground fault protection.
Parameter 40-2 Ground Fault Delay
Shows the response of the Modbus RTU Card to ground fault variation, avoiding trips
due to momentary fluctuations.
Parameter 40-3 Ground Fault Trip Active
Selects when a ground fault trip can occur.
Parameter 40-4 Ground Fault Action
Selects the response of the soft starter to the protection event.
Parameter 40-5 Ground Fault CT Ratio
Set to match the ratio of the ground current measuring CT.
AQ277154312778en-000201 / 175R118016 | Danfoss A/S © 2022.11
Ground Fault Protection
Modbus RTU Card
Installation Guide

7 Specifications
7.1 Connections
Soft starter
6-way pin assembly
Network
5-way male and unpluggable female connector (supplied)
Maximum cable size
2.5 mm2(14 AWG)
7.2 Settings
Protocol
Modbus RTU, AP ASCII
Address range
0–254
Data rate (bps)
4800, 9600, 19200, 38400
Parity
None, Odd, Even, 10-bit
Timeout
None (Off), 10 s, 60 s, 100 s
7.3 Certification
RCM
IEC 60947-4-2
CE
EN 60947-4-2
RoHS
Compliant with EU Directive 2011/65/EU
AQ277154312778en-000201 / 175R1180 | 17Danfoss A/S © 2022.11
Specifications
Modbus RTU Card
Installation Guide

Index
B
Baud rate............................................................................................................8
C
Certification
RCM.......................................................................................................... 17
CE.............................................................................................................. 17
RoHS.........................................................................................................17
Connector plug................................................................................................7
E
Expansion card.................................................................................................7
Expansion port cover.....................................................................................7
L
LEDs..................................................................................................................... 8
P
Polling interval.................................................................................................8
T
Tools
Flat-bladed screwdriver.......................................................................7
Transmission
11-bit..........................................................................................................8
10-bit..........................................................................................................8
AQ277154312778en-000201/175R118018 | Danfoss A/S © 2022.11
Index
Modbus RTU Card
Installation Guide

AQ277154312778en-000201/175R1180 | 19Danfoss A/S © 2022.11
Index
Modbus RTU Card
Installation Guide

AQ277154312778en-000201 / 175R1180
*M0016501*
Danfoss A/S © 2022.11
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Ulsnaes 1
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trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
*175R1180*