KSB PumpDrive 2 User manual

Field Bus Module
Modbus RTU Module
PumpDrive 2
PumpDrive 2 Eco
Supplementary Operating
Manual

Legal information/Copyright
Supplementary Operating Manual Modbus RTU Module
Original operating manual
All rights reserved. The contents provided herein must neither be distributed, copied, reproduced,
edited or processed for any other purpose, nor otherwise transmitted, published or made available to a
third party without the manufacturer's express written consent.
Subject to technical modification without prior notice.
© KSB SE & Co. KGaA, Frankenthal 18/09/2020

Contents
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Modbus RTU Module
Contents
1 Supplementary Operating Manual....................................................................................................... 4
1.1 General..............................................................................................................................................................4
1.2 Field bus module connections .........................................................................................................................4
1.3 Installing the field bus module........................................................................................................................4
1.4 Connecting the field bus module....................................................................................................................6
1.5 Modbus RTU module........................................................................................................................................6
1.6 Modbus RTU protocol ......................................................................................................................................9

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1 Supplementary Operating Manual
1.1 General
This supplementary operating manual accompanies the installation/operating
manual. All information contained in the installation/operating manual must be
observed.
Table1: Relevant operating manuals
Type series Reference number of the installation/ operating
manual
PumpDrive 2 4074.81
PumpDrive 2 Eco 4074.82
1.2 Field bus module connections
The field bus modules are plug-in modules.
BA
1
3 4 5
2
Fig.1: Field bus module
Table2: Field bus module
Item
Component Description
1 M12 connector A B-coded
2 M12 socket B B-coded
3 Amber LED signal lamp Internal bus communication OK (heartbeat detected)
4 Green LED signal lamp Communication on field bus side active/possible
5 Red LED signal lamp Modbus malfunction or communication fault
▪Can be retrofitted
▪Internal T-connector (bus looped through); uninterruptible even in the event of a
frequency inverter power failure
▪Connector for self-assembly
1.3 Installing the field bus module
The field bus module can be fitted in an available slot of the frequency inverter.

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Blind cover
11
Fig.2: Blind cover
1 Blind cover
1. Unscrew the cross recessed head screws in the blind cover.
2. Remove the blind cover.
Field bus module
Fig.3: Inserting the field
bus module
1. Carefully insert the field bus module into the open slot. The plug-in module is
guided on rails until it engages in the contact.
Fig.4: Securing the field bus
module
2. Secure the field bus module using the 4 cross recessed head screws. IP55
enclosure protection is not provided until the screws have been tightened.
CAUTION
Incorrect assembly
Impairment of protection provided by the enclosure (protection may be
compromised)!
▷Cover unused M12 connections with a cap (included in the scope of supply).

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1.4 Connecting the field bus module
Observe the following when connecting the field bus module:
▪Before the bus connection is established among the nodes, potential equalisation
must have been implemented and checked.
▪For high-frequency shielding, use shielded cables and assemble according to EMC
requirements.
▪A minimum distance of 0.3metres is recommended between such cables and
other electric conductors.
▪Do not use the bus cable to make any further connections in addition to the field
bus module (for example, 230V alert and 24V start).
▪A cable specified for the field bus module must be used as the connecting cable.
CAUTION
Incorrect installation
Damage to the field bus module!
▷Never supply power to the field bus module via the M12 connections.
BA BA
21
Fig.5: Connecting the field bus module
Table3: Connecting the field bus module
Item Device M12 connector
1 Frequency inverter 1 M12 connector A: Coming
M12 socket B: Going
2 Frequency inverter 2 M12 connector A: Coming
M12 socket B: Going
1.5 Modbus RTU module
The Modbus RTU module is equipped with an RS485 interface with the Modbus RTU
protocol in accordance with specification V1.1b. Configuration takes place via
frequency inverter parameters.
Communication protocol MODBUS (RTU)
Bus terminator External
Interface EIA-485 (RS485)
Transmission rate 19,200 bit/s (variable)
Device type Slave
Bus access Polling between master and slave
Parity ▪Even
▪Odd
▪No Parity

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A cable specified for Modbus modules that has the following properties must be used
as a connecting cable:
▪Flexible
▪Shielded
▪Twisted wires for the data line (D0-D1)
▪The wave impedance should be at least 100Ohm.
▪Third core or second core pair for the common ground
b)
a)
2
1
5
3
41
5
4
3
2
Fig.6: Pin assignment: a) Contact arrangement of M12 connector, b) Contact
arrangement of M12 socket
Table4: Pin assignment
Pin Core colour code Assignment of M12 connector/
M12 socket (B-coding)
Signal
Cable (CAN open) Cable (DIN 47100)
1 - - VP (+5V) +5V
2 Blue Brown D- RS-485 A / data -
3 Black Green GND GND
4 White White D+ RS-485 B / data +
5 Shielding Shielding Shielding Shielding
Thread - - Shielding Shielding
5
4
32
1
D +
GND
D -
Shielding
5
3
4 1
2
MN
Fig.7: User-configured cable
ⓂM12 connector ⓃM12 socket

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1 2 3 4 51 2 3 4 5
D +
D -
GND
NM
63
52
51
AB
1 2 3 4 5 1 2 3 4 5
A B
Shielding
Fig.8: Wiring diagram
Bus terminator The terminating resistors must conform to the following standard: Profibus standard
DPDIN19245, part3, section6.3.
1390
390
220
2
3
4
Fig.9: Bus terminating resistor M12
The field bus terminating resistor can be plugged directly into the M12 socket. Bus
polarisation does not take place if the field bus module is de-energised. If the bus
terminator is to be independent of the field bus module power supply, it must be
implemented externally using an active bus terminator.
NOTE
The frequency inverter is reset when a field bus module is replaced or retrofitted.
Menu 3-12 for setting the parameters of the field bus module is then enabled in the
control panel.

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1.6 Modbus RTU protocol
Table5: Address range of system (0000 - 00FF)
Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
0000 Modbus Status - DWORD 32-bit bit
field
- System Status r 0 System connection OK
1 Pump 1 online
2 Pump 2 online
3 Pump 3 online
4 Pump 4 online
5 Pump 5 online
6 Pump 6 online
0002 System Alerts - DWORD 32-bit bit
field
- System Status r 0 Lack of water
0004 Reserved - - - - System Status - - -
0006 System Warnings -
-
DWORD
-
32-bit bit
field
- System Status r 0 Setpoint monitoring
1 Actual value monitoring
2 Flow rate monitoring
3 Suction pressure monitoring
4 Discharge pressure monitoring
5 Differential pressure monitoring
6 Temperature monitoring
7 Low flow velocity
8 Overflow
0008
- 00FE
Reserved - - - - System Status - - -
0020 System Start / Stop 1-3-1 DWORD Boolean - System Control r, w - -
0022 Actual Value (Closed-loop
Control)
1-2-3-1 DWORD Float32 Base unit of the type of
control selected
System Control r, w - -
0024 Setpoint (Closed-loop
Control)
1-3-2 DWORD Float33 Base unit of the type of
control selected
System Control r, w - -
0026 Control Value (Open-loop
Control)
1-3-3 DWORD Float32 Speed System Control r, w - -

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
0028 Maximum Number of
Pumps Running
3-7-2 DWORD UINT32 - System Control r, w - -
002A Control Point 3-6-2 DWORD ENUM - System Control r, w 0 Local
1 Field bus
002C Actual Value Source 3-6-3 DWORD ENUM - System Control r, w 0 Local
1 Field bus
002E Actual Value (Closed-loop
Control) in Percent
1-2-3-1 DWORD Float32 Percent System Control r, w - -
0030 Setpoint (Closed-Loop
Control) in Percent
1-3-2 DWORD Float32 Percent System Control r, w - -
0032 Control Value (Open-loop
Control) in Percent
1-3-3 DWORD Float32 Percent System Control r, w - -
0034-
003E
Reserved - - - - System Control - - -
0040 Suction Pressure 1-2-3-2 DWORD Float32 Pressure base unit System Process Variable r - -
0042 Discharge Pressure 1-2-3-3 DWORD Float32 Pressure base unit System Process Variable r - -
0044 Differential Pressure 1-2-3-4 DWORD Float32 Pressure base unit System Process Variable r - -
0046 Flow Rate 1-2-3-5 DWORD Float32 Flow rate base unit System Process Variable r - -
0048 Level 1-2-3-6 DWORD Float32 Level base unit System Process Variable r - -
004A Temperature 1-2-3-7 DWORD Float32 Temperature base unit System Process Variable r - -
004C Flow Velocity of Fluid
Handled
1-2-3-8 DWORD Float32 Velocity System Process Variable r - -
004E Head 1-2-3-9 DWORD Float32 Height System Process Variable r - -
0050
-
005E
Reserved - - - - System Process Variable - - -
0060 Immediate Pump
Changeover
1-3-5 DWORD Boolean - System Function w - -
0062 Immediate Pipe Flushing 1-3-6 DWORD Boolean - System Function w - -
0064 Type of Control 3-6-1 DWORD ENUM - System Control w 0 OFF (open-loop control)
1 Discharge pressure

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
0064 Type of Control 3-6-1 DWORD ENUM - System Control w 2 Suction pressure
3 Differential pressure
4 Differential pressure (sensorless)
5 Flow rate
6 Temperature (cooling)
7 Temperature (heating)
8 Suction-side level
9 Discharge-side level
10 Flow rate (sensorless)
0066 Fixed Speed Percent 3-6-5-1 DWORD Float32 In % of the speed value
range
System Control w - -
0068-
006E
Reserved - - - - - - - -
Table6: Address range of pump 1 (0100 - 01FF)
Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
0100 Pump Status - DWORD ENUM - Pump Status r 1 Pump stopped
2 Pump running
3 Pump starting
4 Pump stopping
5 Pump stopped and interlocked
6 Pump running and interlocked
7 Pump on standby

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
0102 Pump Alerts - DWORD 32-bit bit
field
- Pump Status r 0 Thermal motor protection
1 Overvoltage
2 Undervoltage
3 Phase failure, motor side
4 Short circuit
5 Hardware fault
6 Heat sink temperature high
7 PCB temperature high
8 Overcurrent
9 Braking resistor
10 Dynamic overload protection
11 Firmware update required
12 Dry running
13 Dry running (external)
14 Hydraulic blockage
15 No master control
16 No matching motor data
available
17 No motor data available
18 AMA fault
19 CtrlBoard Power Off
20 24 V undervoltage
21 HMI hardware test not passed
22 IO hardware test not passed
23 External alarm
0104 Reserved - DWORD - - Pump Status - - -
0106 Pump Warnings DWORD 32-bit bit
field
Pump Status r 0 Dynamic overload protection
1 Overvoltage
2 Undervoltage

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
0106 Pump Warnings DWORD 32-bit bit
field
Pump Status r 3 Resonance range
4 Broken wire
5 Actual value failure
6 Hydraulic blockage
7 Part load
8 Overload
9 Heat sink temperature high
10 PCB temperature high
11 Current high
12 Current low
13 Speed monitoring
14 Frequency high
15 Frequency low
16 Power high
17 Power low
18 Limited stop ramp
19 24V overload
20 PumpMeter communication
21 General settings loaded
22 External alarm
0108 Reserved - DWORD - - Pump Status - - -
010A Information on Pump - DWORD 32-bit bit
field
- Pump Status r 0 Pump maintenance/service
interval
1 Drive disabled
010C Reserved - - - - Pump Status - - -
010E Pump Operating Mode 1-3-8 DWORD ENUM - Pump Control r, w 1 Off
2 Manual
0 Auto
0110 Control Value (Manual) 1-3-4 DWORD UINT32 Speed Pump Control r, w - -

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
0112 Reserved - - - - Pump Control - - -
0114 Speed 1-2-1-1 DWORD Float32 Speed Pump Process Variable r - -
0116 Motor Input Power 1-2-1-2 DWORD Float32 Output base unit Pump Process Variable r - -
0118 Pump Input Power 1-2-1-3 DWORD Float32 Output base unit Pump Process Variable r - -
011A Pump Set Input Power 1-2-1-4 DWORD Float32 Output base unit Pump Process Variable r - -
011C Motor Current 1-2-1-5 DWORD Float32 Ampere Pump Process Variable r - -
011E Motor Voltage 1-2-1-6 DWORD Float32 Volt Pump Process Variable r - -
0120 Output Frequency 1-2-1-7 DWORD Float32 Hz Pump Process Variable r - -
0122 DC Link Voltage 1-2-1-8 DWORD Float32 Volt Pump Process Variable r - -
0124 Heat Sink Temperature 1-2-1-9 DWORD Float32 Temperature base unit Pump Process Variable r - -
0126 PCB Temperature 1-2-1-10 DWORD Float32 Temperature base unit Pump Process Variable r - -
0128 Motor Torque 1-2-1-11 DWORD Float32 Nm Pump Process Variable r - -
012A Frequency Inverter
Efficiency
1-2-1-12 DWORD Float32 Percent Pump Process Variable r - -
012C Pump Suction Pressure 1-2-2-1 DWORD Float32 Pressure base unit Pump Process Variable r - -
012E Pump Discharge Pressure 1-2-2-2 DWORD Float32 Pressure base unit Pump Process Variable r - -
0130 Pump Differential
Pressure
1-2-2-3 DWORD Float32 Pressure base unit Pump Process Variable r - -
0132 Pump Flow Rate 1-2-2-4 DWORD Float32 Flow rate base unit Pump Process Variable r - -
0134 Energy Meter (kWh) 1-4-1-1 DWORD UINT32 kWh Pump Process Variable r - -
0136 Frequency Inverter
Operating Hours
1-4-2-1 DWORD UINT32 Hours Pump Process Variable r - -
0138 Pump Operating Hours 1-4-2-3 DWORD UINT32 Hours Pump Process Variable r - -
013A Number of Starts 1-4-2-5 DWORD UINT32 - Pump Process Variable r - -
013C Time to Service 1-6-1 DWORD UINT32 Hours Pump Process Variable r - -
013E Reserved - - - - - - - -
0140 Immediate Functional
Check Run
1-3-6 DWORD Boolean - Pump Function w - -
0142 Reset Messages - DWORD Boolean - Pump Function w - -

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
0144
- 014F
Reserved - - - - - - - -
0150 Digital Input Status 1-2-4-6 DWORD 32-bit bit
field
- Pump Process Variable r - -
0152 Analog Input 1 Value 1-2-4-1 DWORD Float32 Percent Pump Process Variable r - -
0154 Analog Input 2 Value 1-2-4-2 DWORD Float32 Percent Pump Process Variable r - -
0156 Analog Input 3 Value 1-2-4-3 DWORD Float32 Percent Pump Process Variable r - -
158 Digital Output Status 1-2-4-7 DWORD 32-bit bit
field
- Pump Process Variable r - -
15A Digital Input 1 Function 3-8-6-1 DWORD ENUM - Pump Control w 0 No function
1 System start
2 Potentiometer auto -
3 Potentiometer auto +
4 Control point
5 Alternative setpoint/ control
value active
6 Control digital bit 0
7 Control digital bit 1
8 Control digital bit 2
9 Dry running protection
10 Reset messages
11 Control AOUT bit 0
12 Control AOUT bit 1
13 Reserve
14 Reserve
15 Reserve
16 Reserve
17 External message
18 Potentiometer manual -
19 Potentiometer manual +

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
15A Digital Input 1 Function 3-8-6-1 DWORD ENUM - Pump Control w 20 Reserve
21 Start pump changeover
22 Start functional check run
23 Start pipe flushing
24 Overflow
25 Lack of water
26 Parameter set changeover
15C Digital Input 2 Function 3-8-6-2 DWORD ENUM - Pump Control w 0 No function
1 System start
2 Potentiometer auto -
3 Potentiometer auto +
4 Control point
5 Alternative setpoint/ control
value active
6 Control digital bit 0
7 Control digital bit 1
8 Control digital bit 2
9 Dry running protection
10 Reset messages
11 Control AOUT bit 0
12 Control AOUT bit 1
13 Reserve
14 Reserve
15 Reserve
16 Reserve
17 External message
18 Potentiometer manual -
19 Potentiometer manual +
20 Reserve

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
15C Digital Input 2 Function 3-8-6-2 DWORD ENUM - Pump Control w 21 Start pump changeover
22 Start functional check run
23 Start pipe flushing
24 Overflow
25 Lack of water
26 Parameter set changeover
15E Digital Input 3 Function 3-8-6-3 DWORD ENUM - Pump Control w 0 No function
1 System start
2 Potentiometer auto -
3 Potentiometer auto +
4 Control point
5 Alternative setpoint/ control
value active
6 Control digital bit 0
7 Control digital bit 1
8 Control digital bit 2
9 Dry running protection
10 Reset messages
11 Control AOUT bit 0
12 Control AOUT bit 1
13 Reserve
14 Reserve
15 Reserve
16 Reserve
17 External message
18 Potentiometer manual -
19 Potentiometer manual +
20 Reserve
21 Start pump changeover

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Modbus address Parameter name Menu number Size Data type Unit Group Access (r: read, w: write) Bit Description
15E Digital Input 3 Function 3-8-6-3 DWORD ENUM - Pump Control w 22 Start functional check run
23 Start pipe flushing
24 Overflow
25 Lack of water
26 Parameter set changeover
160 Role in Multiple Pump
System
3-7-1 DWORD ENUM - Pump Control w 0 Master control
1 Auxiliary control
0162
- 01FF
Reserved - - - - - - - -
Table7: Address ranges for further pumps
Modbus address Description
0200-02FF Pump 2
0300-03FF Pump 3
0400-04FF Pump 4
0500-05FF Pump 5
0600-06FF Pump 6
Address examples for further pumps
▪0200: Status Pump 2
▪0330: Differential Pressure Pump 3
▪0614: Speed Pump 6

KSB SE & Co. KGaA
Johann-Klein-Straße 9 • 67227 Frankenthal (Germany)
Tel. [phone]
www.ksb.com
4074.803/08-EN (01512588)