Grundfos CIM 2 Series Bedienungsanleitung

CIM 2XX Modbus module

Installation and operating instructions

GRUNDFOS INSTRUCTIONS

English (GB)

English (GB) Installation and operating instructions

Original installation and operating instructions.

CONTENTS

Page

1. Symbols used in this document

2. Applications

The CIM 2XX Modbus module

(CIM = Communication Interface Module), which is a

Modbus slave, enables data transmission between

a Modbus RTU network and a Grundfos product.

The CIM 2XX is fitted in the product to be

communicated with or in a CIU 2XX unit

(CIU = Communication Interface Unit).

Retrofitting of the CIM 2XX is described in the

installation and operating instructions of the

Grundfos product.

Further information

For further information about configuration and

functionality of the CIM 2XX, see the specific

functional profile on the CD-ROM supplied with the

product.

1. Symbols used in this document 2

2. Applications 2

2.1 CIM 2XX Modbus module 3

3. Installation 3

3.1 Connecting the Modbus 3

3.2 Setting the Modbus address 4

3.3 Termination resistor 5

3.4 Setting the parity 5

3.5 Setting the Modbus transmission speed 6

4. LEDs 6

5. Fault finding 7

6. Technical data 9

7. Service 9

7.1 Service documentation 9

8. Disposal 9

Warning

Prior to installation, read these installation

and operating instructions. Installation and

operation must comply with local

regulations and accepted codes of good

practice.

Warning

If these safety instructions are not

observed, it may result in personal injury!

Caution

If these safety instructions are not

observed, it may result in malfunction or

damage to the equipment!

Note

Notes or instructions that make the job

easier and ensure safe operation.

English (GB)

2.1 CIM 2XX Modbus module

Fig. 1 CIM 2XX Modbus module

3. Installation

3.1 Connecting the Modbus

A screened, twisted-pair cable must be used. The

cable screen must be connected to protective earth

at both ends.

Recommended connection

Fitting the cable

Procedure:

See fig. 3.

1. Connect the yellow conductor(s) to terminal D1

(pos. 1).

2. Connect the brown conductor(s) to terminal D0

(pos. 2).

3. Connect the grey conductor(s) to terminal

Common/GND (pos. 3).

4. Connect the cable screens to earth via the earth

clamp (pos. 4).

Maximum cable length, see section 3.3 Termination

resistor.

Fig. 2 Example of Modbus network with

termination

* Hardware unit enabling connection to the Modbus

network.

TM04 1697 0908

Pos. Designation Description

1D1 Modbus terminal D1

(positive data signal)

2D0 Modbus terminal D0

(negative data signal)

3 Common/GND Modbus terminal

Common/GND

4 SW1/SW2 On/off switches for

termination resistor

5 SW3/SW4/SW5

Switches for selection of

Modbus parity and

transmission speed

6LED1 Red/green status LED for

Modbus communication

7LED2

Red/green status LED for

internal communication

between the CIM 2XX and

the Grundfos product

8SW6

Hex switch for setting the

Modbus address

(four most significant bits)

9SW7

Hex switch for setting the

Modbus address

(four least significant bits)

1 2 34 5 6 7

Warning

The CIM 2XX must only be connected to

SELV or SELV-E circuits.

Modbus terminal Colour

code Data signal

D1 Yellow Positive

D0 Brown Negative

Common/GND Grey Common/GND

Note

It is important to connect the screen to

earth through the earth clamp and to

connect the screen to earth in all units

connected to the bus line.

TM04 1947 1508

Master

Slave

Slave Slave

Slave

LT = Line Termination

(termination resistor)

English (GB)

Fig. 3 Example of Modbus connection as

daisy chain

3.2 Setting the Modbus address

The CIM 2XX Modbus module has two hexadecimal

rotary switches for setting the Modbus address.

The two switches are used for setting the four most

significant bits (SW6) and the four least significant

bits (SW7), respectively. See fig. 4.

Fig. 4 Setting the Modbus address

The table below shows examples of Modbus address

settings.

For a complete overview of Modbus addresses, see

the table on page 10.

TM04 1698 0908

Pos. Description

1 Modbus terminal D1

2 Modbus terminal D0

3 Modbus terminal Common/GND

4 Earth clamp

TM04 1706 0908

Note

The Modbus address must be set

decimally from 1 to 247.

Modbus address SW6 SW7

808

20 1 4

31 1 F

247 F 7

SW6 SW7

English (GB)

3.3 Termination resistor

The termination resistor is fitted on the CIM 2XX

Modbus module and has a value of 150 .

The CIM 2XX has a DIP switch with two switches

(SW1 and SW2) for cutting the termination resistor in

and out. Figure 5shows the DIP switches in cut-out

state.

Fig. 5 Cutting the termination resistor in and

out

DIP switch settings

Cable length

3.4 Setting the parity

The parity can be set either manually by using SW3

or via software-defined settings.

Manual setting of parity and stop bit

Default byte format (11 bits):

• 1 start bit

• 8 data bits (least significant bit sent first)

• 1 parity bit (even parity)

• 1 stop bit.

See fig. 6.

Fig. 6 Parity

DIP switch settings

Software-defined parity and stop bit

When SW4 and SW5 are set to "software-defined",

the value in holding registers at addresses 00009

and 00010 will override the setting of SW3. See figs

6 and 7.

TM04 1701 0908

Status SW1 SW2

Cut-in ON ON

Cut-out

OFF OFF

ON OFF

OFF ON

bits/s

Maximum cable length

Terminated

cable

Unterminated

cable

[m/ft] [m/ft]

1200-9600 1200/4000 1200/4000

19200 1200/4000 500/1700

38400 1200/4000 250/800

Note

To ensure a stable and reliable

communication, it is important that only the

termination resistor of the first and last unit

in the Modbus network is cut in. See fig. 2.

SW1 SW2

TM04 1709 0908

Parity SW3

Even parity, 1 stop bit [default] OFF

No parity, 2 stop bits ON

Software-defined parity Set register value

00009

No parity [default] 0

Even parity 1

Odd parity 2

Software-defined stop bit Set register value

00010

1 stop bit [default] 1

2 stop bits 2

Note

Before the parity and stop bit can be set

via software-defined settings, SW4 and

SW5 must be set to ON.

SW3

English (GB)

3.5 Setting the Modbus transmission speed

The transmission speed must be set correctly before

the CIM 2XX Modbus module is ready to

communicate with the Modbus network. See fig. 7.

Fig. 7 Modbus transmission speed

DIP switch settings

Software-defined

When SW4 and SW5 are set to "software-defined",

writing a value to the holding register at address

00004 will set a new transmission speed.

Use the following values for software-defined

transmission speeds:

4. LEDs

The CIM 2XX Modbus module has two LEDs.

See fig. 1.

• Red/green status LED (LED1) for Modbus

communication

• Red/green status LED (LED2) for internal

communication between the CIM 2XX and

the Grundfos product.

LED1

LED2

TM04 1710 0908

Transmission speed

[bits/s] SW4 SW5

9600 OFF ON

19200 OFF OFF

38400 ON OFF

Software-defined ON ON

Software-defined

transmission speed

Set register value

00004

1200 bits/s 0

2400 bits/s 1

4800 bits/s 2

9600 bits/s 3

19200 bits/s 4

38400 bits/s 5

Note

When software-defined transmission

speed is enabled (ON), software-defined

parity and stop bit are also enabled.

SW4 SW5

Status Description

Off. No Modbus communication.

Flashing green. Modbus communication active.

Flashing red. Fault in the Modbus

communication.

Permanently

red.

Fault in the CIM 2XX Modbus

configuration.

Status Description

Off. The CIM 2XX has been switched

off.

Flashing red.

No internal communication

between the CIM 2XX and

the Grundfos product.

Permanently

red.

The CIM 2XX does not support

the Grundfos product connected.

Permanently

green.

Internal communication between

the CIM 2XX and the Grundfos

product is OK.

Note

During start-up, there may be a delay of up

to 5 seconds before the LED2 status is

updated.

English (GB)

5. Fault finding

Faults in a CIM 2XX Modbus module can be detected by observing the status of the two communication LEDs.

See the table below.

CIM 2XX fitted in a Grundfos product

Fault (LED status) Possible cause Remedy

1. Both LEDs (LED1 and LED2)

remain off when the power

supply is connected.

a) The CIM 2XX is fitted

incorrectly in the Grundfos

product.

Check that the CIM 2XX is fitted/

connected correctly.

b) The CIM 2XX is defective. Replace the CIM 2XX.

2. The LED for internal

communication (LED2)

is flashing red.

a) No internal communication

between the CIM 2XX and the

Grundfos product.

Check that the CIM 2XX is fitted

correctly in the Grundfos product.

3. The LED for internal

communication (LED2)

is permanently red.

a) The CIM 2XX does not

support the Grundfos product

connected.

Contact the nearest Grundfos

company.

4. The Modbus LED (LED1)

is permanently red.

a) Fault in the CIM 2XX Modbus

configuration.

• Check the transmission speed

(switches SW4 and SW5). If the

switches are set to "software-

defined", an invalid value may

have been set via Modbus.

Try one of the preselected

transmission speeds, e.g.

19200 bits/s.

• Check that the Modbus address

(switches SW6 and SW7) has a

valid value [1-247].

5. The Modbus LED (LED1)

is flashing red.

a) Fault in the Modbus

communication (fault in parity

or cyclic redundancy check).

• Check the transmission speed

(switches SW4 and SW5).

See section 3.5.

• Check the parity setting (switch

SW3). See section 3.4.

• Check the cable connection

between the CIM 2XX and the

Modbus network.

• Check the termination resistor

settings (switches SW1 and

SW2).

See section 3.3.

English (GB)

CIM 2XX fitted in the CIU 2XX

Fault (LED status) Possible cause Remedy

1. Both LEDs (LED1 and LED2)

remain off when the power

supply is connected.

a) The CIU 2XX is defective. Replace the CIU 2XX.

2. The LED for internal

communication (LED2)

is flashing red.

a) No internal communication

between the CIU 2XX and the

Grundfos product.

• Check the cable connection

between the Grundfos product

and the CIU 2XX.

• Check that the individual

conductors have been fitted

correctly.

• Check the power supply to the

Grundfos product.

3. The LED for internal

communication (LED2)

is permanently red.

a) The CIU 2XX does not

support the Grundfos product

connected.

Contact the nearest Grundfos

company.

4. The Modbus LED (LED1)

is permanently red.

a) Fault in the CIM 2XX Modbus

configuration.

• Check the transmission speed

(switches SW4 and SW5). If the

switches are set to "software-

defined", an invalid value may

have been set via Modbus.

Try one of the preselected

transmission speeds, e.g.

19200 bits/s.

• Check that the Modbus address

(switches SW6 and SW7) has a

valid value [1-247].

5. The Modbus LED (LED1)

is flashing red.

a) Fault in the Modbus

communication (fault in parity

or cyclic redundancy check).

• Check the transmission speed

(switches SW4 and SW5).

See section 3.5.

• Check the parity setting (switch

SW3). See section 3.4.

• Check the cable connection

between the CIM 2XX and the

Modbus network.

• Check the termination resistor

settings (switches SW1 and

SW2).

See section 3.3.

English (GB)

6. Technical data

7. Service

7.1 Service documentation

Service documentation is available on

www.grundfos.com > International website >

WebCAPS > Service.

If you have any questions, please contact the

nearest Grundfos company or service workshop.

8. Disposal

This product or parts of it must be disposed of in an

environmentally sound way:

1. Use the public or private waste collection service.

2. If this is not possible, contact the nearest

Grundfos company or service workshop.

Subject to alterations.

Transceiver RS-485

Cable

Screened, twisted-pair

Min. 0.25 mm2

Min. 23 AWG

Maximum cable length 1200 m

4000 ft

Transmission speed 1200-38400 bits/s

Maximum number of

Modbus units per

segment

Protocol Modbus RTU

Supply voltage 5 VDC ±5 %,

Imax. 200 mA

Storage temperature –25 °C to +70 °C

–13 °F to +158 °F

Appendix

Appendix 1

Modbus addresses

Modbus

Address

Modbus

Address

Modbus

Address

Modbus

Address

Modbus

Address

1 0 1 51 3 3 101 6 5 151 9 7 201 C 9

2 0 2 52 3 4 102 6 6 152 9 8 202 C A

3 0 3 53 3 5 103 6 7 153 9 9 203 C B

4 0 4 54 3 6 104 6 8 154 9 A 204 C C

5 0 5 55 3 7 105 6 9 155 9 B 205 C D

6 0 6 56 3 8 106 6 A 156 9 C 206 C E

7 0 7 57 3 9 107 6 B 157 9 D 207 C F

8 0 8 58 3 A 108 6 C 158 9 E 208 D 0

9 0 9 59 3 B 109 6 D 159 9 F 209 D 1

10 0 A 60 3 C 110 6 E 160 A 0 210 D 2

11 0 B 61 3 D 111 6 F 161 A 1 211 D 3

12 0 C 62 3 E 112 7 0 162 A 2 212 D 4

13 0 D 63 3 F 113 7 1 163 A 3 213 D 5

14 0 E 64 4 0 114 7 2 164 A 4 214 D 6

15 0 F 65 4 1 115 7 3 165 A 5 215 D 7

16 1 0 66 4 2 116 7 4 166 A 6 216 D 8

17 1 1 67 4 3 117 7 5 167 A 7 217 D 9

18 1 2 68 4 4 118 7 6 168 A 8 218 D A

19 1 3 69 4 5 119 7 7 169 A 9 219 D B

20 1 4 70 4 6 120 7 8 170 A A 220 D C

21 1 5 71 4 7 121 7 9 171 A B 221 D D

22 1 6 72 4 8 122 7 A 172 A C 222 D E

23 1 7 73 4 9 123 7 B 173 A D 223 D F

24 1 8 74 4 A 124 7 C 174 A E 224 E 0

25 1 9 75 4 B 125 7 D 175 B F 225 E 1

26 1 A 76 4 C 126 7 E 176 B 0 226 E 2

27 1 B 77 4 D 127 7 F 177 B 1 227 E 3

28 1 C 78 4 E 128 8 0 178 B 2 228 E 4

29 1 D 79 4 F 129 8 1 179 B 3 229 E 5

30 1 E 80 5 0 130 8 2 180 B 4 230 E 6

31 1 F 81 5 1 131 8 3 181 B 5 231 E 7

32 2 0 82 5 2 132 8 4 182 B 6 232 E 8

33 2 1 83 5 3 133 8 5 183 B 7 233 E 9

34 2 2 84 5 4 134 8 6 184 B 8 234 E A

35 2 3 85 5 5 135 8 7 185 B 9 235 E B

36 2 4 86 5 6 136 8 8 186 B A 236 E C

37 2 5 87 5 7 137 8 9 187 B B 237 E D

38 2 6 88 5 8 138 8 A 188 B C 238 E E

39 2 7 89 5 9 139 8 B 189 B D 239 E F

40 2 8 90 5 A 140 8 C 190 B E 240 F 0

41 2 9 91 5 B 141 8 D 191 B F 241 F 1

42 2 A 92 5 C 142 8 E 192 C 0 242 F 2

43 2 B 93 5 D 143 8 F 193 C 1 243 F 3

44 2 C 94 5 E 144 9 0 194 C 2 244 F 4

45 2 D 95 5 F 145 9 1 195 C 3 245 F 5

46 2 E 96 6 0 146 9 2 196 C 4 246 F 6

47 2 F 97 6 1 147 9 3 197 C 5 247 F 7

48 3 0 98 6 2 148 9 4 198 C 6

49 3 1 99 6 3 149 9 5 199 C 7

50 3 2 100 6 4 150 9 6 200 C 8

Caution

It is very important to ensure that two devices

do not have the same address on the

network. If two devices have the same

address, the result will be an abnormal

behaviour of the whole serial bus.

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