KSB PumpDrive 2 Bedienungsanleitung

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

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.

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

1 Supplementary Operating Manual

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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.

3 4 5

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

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

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

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

D +

GND

D -

Shielding

4 1

Fig.7: User-configured cable

ⓂM12 connector ⓃM12 socket

1 Supplementary Operating Manual

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1 2 3 4 51 2 3 4 5

D +

D -

GND

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

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.

1 Supplementary Operating Manual

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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 - -

1 Supplementary Operating Manual

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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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