Grundfos CIM 2 Series User manual

CIM 2XX Modbus module
Installation and operating instructions
GRUNDFOS INSTRUCTIONS

English (GB)
2
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)
3
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
8
9
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
Slave
LT = Line Termination
(termination resistor)
*

English (GB)
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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
2
3
1
4
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)
5
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)
6
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)
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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)
8
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)
9
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
32
Protocol Modbus RTU
Supply voltage 5 VDC ±5 %,
Imax. 200 mA
Storage temperature –25 °C to +70 °C
–13 °F to +158 °F

Appendix
10
Appendix 1
Modbus addresses
Modbus
Address
SW
6
SW
7
Modbus
Address
SW
6
SW
7
Modbus
Address
SW
6
SW
7
Modbus
Address
SW
6
SW
7
Modbus
Address
SW
6
SW
7
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.