ABB ControlMaster CM10 Use and care manual

Communications Supplement IM/CM/C–EN
ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN

The Company
We are an established world force in the design and manufacture of instrumentation for industrial process control, flow
measurement, gas and liquid analysis and environmental applications.
As a part of ABB, a world leader in process automation technology, we offer customers application expertise, service and
support worldwide.
We are committed to teamwork, high quality manufacturing, advanced technology and unrivalled service and support.
The quality, accuracy and performance of the Company’s products result from over 100 years experience, combined with
a continuous program of innovative design and development to incorporate the latest technology.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN Contents
IM/CM/C–EN 1
Contents
1 Safety .......................................................................... 2
1.1 Electrical Safety ................................................... 2
1.2 Symbols .............................................................. 2
1.3 Health & Safety .................................................... 3
2 Introduction ................................................................ 4
2.1 EC Directive 89/336/EEC ..................................... 4
3 Communication Overview .......................................... 5
3.1 Communication Options ...................................... 5
3.1.1 Ethernet .................................................. 5
3.1.2 RS 485 MODBUS ................................... 6
3.2 PC Configuration ................................................. 7
4 Communication Level ................................................ 8
4.1 Communication ................................................... 8
5 MODBUS Communications ..................................... 13
5.1 Electrical Connections ....................................... 13
5.2 Host Computer Serial Communications ............. 13
5.3 Two-wire and Four-wire Connection .................. 15
5.4 Pull-up and Pull-down Resistors ........................ 16
5.5 Termination Resistor .......................................... 16
5.6 Serial Connections ............................................. 17
5.7 Input Coils – Digital Inputs .................................. 18
5.8 Output Coils ....................................................... 19
5.9 Input Registers ................................................... 20
5.9.1 Read-only 32 Bits ................................. 20
5.9.2 Read-only Single Precision Float ........... 20
5.9.3 Input Registers For Bytes ...................... 21
5.10 Holding Registers ............................................... 21
5.10.1 Writable 16 Bits ..................................... 21
5.10.2 Writable 32 Bits ..................................... 22
5.10.3 Writable Single Precision Float .............. 22
6 Ethernet Connections ............................................... 24
7 Specification ............................................................. 25

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 1 Safety
2IM/CM/C–EN
1Safety
Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual
for any other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval of
the Technical Publications Department.
1.1 Electrical Safety
This equipment complies with the requirements of CEI/IEC 61010-1:2001-2 'Safety Requirements for Electrical Equipment for
Measurement, Control and Laboratory Use' and complies with US NEC 500, NIST and OSHA.
If the equipment is used in a manner NOT specified by the Company, the protection provided by the equipment may be
impaired.
1.2 Symbols
One or more of the following symbols may appear on the equipment labelling:
Warning – Refer to the manual for instructions Direct current supply only
Caution – Risk of electric shock Alternating current supply only
Functional earth (ground) terminal Both direct and alternating current supply
Protective earth (ground) terminal The equipment is protected
through double insulation

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 1 Safety
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1.3 Health & Safety
Health and Safety
To ensure that our products are safe and without risk to health, the following points must be noted:
The relevant sections of these instructions must be read carefully before proceeding.
Warning labels on containers and packages must be observed.
Installation, operation, maintenance and servicing must be carried out only by suitably trained personnel and in
accordance with the information given.
Normal safety precautions must be taken to avoid the possibility of an accident occurring when operating in
conditions of high pressure and / or temperature.
Safety advice concerning the use of the equipment described in this manual or any relevant hazard data sheets (where
applicable) may be obtained from the Company, together with servicing and spares information.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 2 Introduction
4IM/CM/C–EN
2Introduction
This manual provides details for the ControlMaster CM10 (1/8DIN), CM15 (1/8DIN), CM30 (1/4DIN) and CM50 (1/2DIN)
communication protocols, MODBUS connections and configuration tables and Ethernet connection details.
2.1 EC Directive 89/336/EEC
In order to meet the requirements of the EC Directive 89/336/EEC for EMC regulations, this product must not be used in a non-
industrial environment.
Note.
Install and use associated equipment in accordance with the relevant national and local standards.
System configuration must be carried out only by users or personnel with approved access rights (user privileges).
Read all relevant sections of this guide before configuring the system or modifying system parameters.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 3 Communication Overview
IM/CM/C–EN 5
3 Communication Overview
Extensive communication options enable the ControlMaster to be integrated into larger control systems easily or connected to
other process instrumentation.
3.1 Communication Options
3.1.1 Ethernet
Optional Ethernet communications enable the ControlMaster to be integrated in to an Ethernet network quickly.
The following functionality is provided:
Email
Notification of a critical process event or status can be made by email. Multiple events can trigger an email that can be
sent to multiple recipients.
Webserver
ControlMaster's integrated webserver enables the current status of the process and controller to be viewed remotely
using a standard web browser.
MODBUS TCP
Process values and status can be communicated to and from the ControlMaster in real-time using MODBUS TCP,
enabling it to be integrated easily into larger control systems or connected to a data recorder.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 3 Communication Overview
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3.1.2 RS 485 MODBUS
Using RS 485 MODBUS, values and status can be communicated to and from the controller in real-time via an RS 485
connection.
Fig. 3.1 Webserver Fig. 3.2 ControlMasters connected to a ScreenMaster

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 3 Communication Overview
IM/CM/C–EN 7
3.2 PC Configuration
In addition to configuration via the front panel, the ControlMaster can be configured from a PC via the infrared port (configuration
files can be stored locally on a PC and transferred to the controller via the infrared port).
For further information contact your sales representative.
Fig. 3.3 PC Configuration Software
Fig. 3.4 Transferring a Configuration File via the Infrared Port
Infrared Port
Located Behind
Instrument Screen

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 4 Communication Level
8IM/CM/C–EN
4 Communication Level
4.1 Communication
The Communication parameters are accessed from the Advanced access level – refer to the User Guide supplied with your
instrument for access details.
Note. Communication parameters are displayed for the type of communication board fitted in the instrument, for example,
if a MODBUS board is fitted, MODBUS parameters are enabled, but Ethernet parameters are not enabled or displayed.
Used to setup communications parameters for the MODBUS / Ethernet / email communication protocols.
MODBUS Refer to Section 5, page 13 for details of MODBUS coils and registers.
Device Address The unique network address assigned to this device (1 to 247) that allows the host system to
identify the instrument on a MODBUS link.
Reverse IEEE Data All analog data is read from the instrument in IEEE (Institute of Electronics and Electrical Engineers)
format contained in adjacent registers representing the data in high word / low word order.
Select Yes to reverse the IEEE data order, otherwise select No.
Menu
Communication

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 4 Communication Level
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…Communication
RS485 Setup
Mode Selects the MODBUS serial communication serial link as 2 Wire, 4 Wire or Off – see Section 5.3,
page 15.
Baud Rate A selectable communication transfer rate up to 115.2 K baud (bits per second) maximum (default
19200 baud).
Parity Sets the parity bit (transmission error-checking) condition.
Selected from:
No Parity
Odd Parity
Even Parity
Tx Delay A set delay to the response from the transmitter in milliseconds. Maximum delay 100 ms.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 4 Communication Level
10 IM/CM/C–EN
…Communication
MODBUS TCP
Setup
Note. After changing any of the TCP parameters it is advisable to power-cycle the instrument to
ensure changes are applied.
Implementation Select the MODBUS TCP operation mode:
Off – MODBUS TCP disabled
Server – instrument acts as a MODBUS slave
Port Displays the TCP/IP port used by the MODBUS TCP network (fixed at 502).
Connections Select the maximum number of simultaneous TCP/IP connections permitted – minimum 1,
maximum 3.
Client Authority Select the number of authorized TCP/IP connections permitted:
Selected from:
Unrestricted – any MODBUS TCP client device is permitted to poll the instrument
1 (to 3) – Only the MODBUS TCP client device whose IP address is entered in the
authorized Client 1 (to 3) IP parameter (below) is permitted to poll the instrument.
Client 1 (to 3) IP Enter the IP address(es) of the MODBUS TCP Client (MODBUS Master) device(s) permitted to poll
the instrument for data.
Note. Displayed only if the Client Authority parameter (above) is not set to Unrestricted.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 4 Communication Level
IM/CM/C–EN 11
…Communication
Ethernet
DHCP Set DHCP (Dynamic Host Control Protocol) enable to On if the IP address is to be allocated
dynamically by the network. Set to Off if the IP address is defined statically.
IP Address Set the IP address to be assigned to the instrument. The IP address is used by the TCP/IP
protocol to distinguish between different devices. The address is a 32-bit value expressed with 4
values (0 to 255), each separated by a period (.).
Note. Configurable only if DHCP is disabled.
Subnet Mask The subnet mask is used to indicate which part of the IP address is used for the network ID and
which part is used for the host ID. Set each bit that is part of the network ID as '1's, for example:
255.255.255.0 indicates the first 24 bits are for the network ID.
Default Gateway Note. This setting is only required if a router (or switch) is used.
Sets the IP address for the Default Gateway (router or switch) used to communicate with other
networks. The default setting is '000.000.000.000'.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 4 Communication Level
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…Communication
Email
SMTP Server IP The IP (Internet Protocol) address of the SMTP (Simple Mail Transport Protocol) server used to
distribute emails.
Recipients
EmailAddress1(3) Enter the email address(es) of the recipient(s).
Triggers
Tag 1(4) The trigger description that appears in the subject title.
Source 1(4) Up to 4 independently configurable triggers can be enabled to generate an email when the
selected source becomes active (the email can be sent to up to 3 recipients).
Invert 1(4) If enabled, an email is generated when the Source becomes inactive instead of active.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 5 MODBUS Communications
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5 MODBUS Communications
5.1 Electrical Connections
This section describes the connection of serial data cables between the master (host computer) and slave instrument on a
MODBUS serial link.
5.2 Host Computer Serial Communications
The serial interface option module operates using the MODBUS Remote Terminal Unit (RTU) Master / Slave protocol. An
appropriate RS422 / 485 communications driver must fitted to the host (master) computer. It is strongly recommended that the
interface has galvanic isolation to protect the computer from lightning damage and to increase signal immunity to noise pick-up.
Note. The MODBUS option provides the following facilities:
Standard RS422/485 communications.
MODBUS RTU protocol – the instrument is designed to operate as a Remote Terminal Unit (RTU) slave when
communicating with a master (host) system.
500V DC isolation from external connections to the instrument.
Two- or four-wire communication (selected at the MODBUS / Mode parameter) – see page 9.
1200, 2400, 4800, 9600, 19200, 38400, or 115200 baud transmission rate – see page 9.
Parity-checking (odd, even or none) – see page 9.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 5 MODBUS Communications
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Warning.
The instrument is not fitted with a switch therefore a disconnecting device such as a switch or circuit breaker
conforming to local safety standards must be fitted to the final installation.
It must be mounted in close proximity to the instrument within easy reach of the operator and must be marked clearly
as the disconnection device for the instrument.
Remove all power from supply, relay and any powered control circuits and high common mode voltages before
accessing or making any connections.
Use cable appropriate for the load currents. The terminals accept cables from 18 to 14 AWG (0.8 to 2.5 mm2).
Always route signal leads and power cables separately, preferably in earthed (grounded) metal conduit.
It is strongly recommended that screened cable is used for signal inputs and relay connections.
The instrument conforms to Mains Power Input Insulation Category 2, Pollution Degree 2 (EN601010–1).
(This equipment is protected through double insulation – Class II.)
All connections to secondary circuits must have basic insulation.
After installation, there must be no access to live parts, e.g. terminals.
Terminals for external circuits are for use only with equipment with no accessible live parts.
If the instrument is used in a manner not specified by the Company, the protection provided by the equipment may
be impaired.
All equipment connected to the instrument's terminals must comply with local safety standards
(IEC 60950, EN601010–1).

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 5 MODBUS Communications
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5.3 Two-wire and Four-wire Connection
MODBUS serial communications can be configured as either 2-wire or 4-wire serial links – see Fig. 5.1. The instrument must
be added to the link configuration on the host system – refer to information supplied with the host system.
Fig. 5.1 2-Wire and 4-Wire MODBUS Serial Links
14
15
16
17
18
14
15
16
17
18
Modbus Modbus
Comms
Comms
19
20
21
22
23
19
20
21
22
23
CM10, 15, 30 CM50 CM10, 15, 30 CM50
'A'
'B'
'A'
'B'
Host Computer Host Computer
2-Wire Connection 4-Wire Connection
Standard Connections Standard Connections
'A'
'B'
'A'
'B'
Tx+/Rx+
Tx–/Rx–
COM
Tx+
Tx–
Rx+
Rx–
GND
0 V
1.8  Pull-
down Resistor
1.8 kPull-up
Resistor
+5 V Tx+
Tx–
Rx+
Rx–
COM
0 V
+5 V
0 V
+5 V
1.8 kPull-up
Resistor
1.8 k
Pull-down Resistor
1.8 k
Pull-up
Resistor
0 V
1.8 k
Pull-down Resistor

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 5 MODBUS Communications
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5.4 Pull-up and Pull-down Resistors
To prevent false triggering of slaves when the master (host computer) is inactive, pull-up and pull-down resistors must be fitted
to the RS422/485 interface in the host computer.
Resistors are normally connected to the interface by hard-wired links or switches – refer to the manufacturer's instructions
5.5 Termination Resistor
For long transmission lines, a 120 termination resistor must be fitted to the last slave in the chain – see Fig. 5.2.
Fig. 5.2 Connecting Multiple Slaves
14
15
16
17
18
14
15
16
17
18
CM10, 15, 30 CM50 CM10, 15, 30 CM50
19
20
21
22
23
19
20
21
22
23
Rx+
Rx–
Tx+
Tx–
COM
Host
Computer
Tx–
Rx+
Rx–
COM
Tx+
Tx–
Rx+
Rx–
COM
Tx+
Last Slave First Slave
120 
Termination Resistor Standard
Connections
Standard
Connections
Master

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 5 MODBUS Communications
IM/CM/C–EN 17
5.6 Serial Connections
Connections to the MODBUS serial board must be made as shown in Fig. 5.1. Connections to two- or four-wire link
configurations on systems with multiple slaves must be made in parallel as shown in Fig. 5.2. When connecting cable screens,
ensure that ground loops are not introduced.
The maximum serial data transmission line length for both RS422 and RS485 systems is 1200 m (3937 ft.).
The types of cable that can be used are determined by the total line length:
Up to 6 m (19.7 ft.) – standard screened or twisted pair cable.
Up to 300 m (984 ft.) – twin twisted pair with overall foil screen and an integral drain wire.
Up to 1200 m (3937 ft.) – twin twisted pair with separate foil screens and integral drain wires.

ControlMaster CM10, CM15, CM30 and CM50
Universal process controllers and indicators, 1/8, 1/4and 1/2DIN 5 MODBUS Communications
18 IM/CM/C–EN
5.7 Input Coils – Digital Inputs
MODBUS
Coil Title
0 Analog Input 1 Fail
1 Analog Input 2 Fail
2 Analog Input 3 Fail
3 Analog Input 4 Fail
8 Math Block 1 Fail
9 Math Block 2 Fail
10 Math Block 3 Fail
11 Math Block 4 Fail
12 Math Block 5 Fail
13 Math Block 6 Fail
14 Math Block 7 Fail
15 Math Block 8 Fail
16 Custom Linearizer 1 Fail
17 Custom Linearizer 2 Fail
18 Loop 1 Setpoint 1 Active
19 Loop 2 Setpoint 1 Active
20 Loop 1 Setpoint 2 Active
21 Loop 2 Setpoint 2 Active
22 Loop 1 Setpoint 3 Active
23 Loop 2 Setpoint 3 Active
24 Loop 1 Setpoint 4 Active
25 Loop 2 Setpoint 4 Active
26 Digital Output 1
27 Digital Output 2
28 Digital Output 3
29 Digital Output 4
30 Digital Output 5
31 Digital Output 6
32 Relay 1
33 Relay 2
34 Relay 3
35 Relay 4
40 Logic Equation 1 State
41 Logic Equation 2 State
42 Logic Equation 3 State
43 Logic Equation 4 State
44 Logic Equation 5 State
45 Logic Equation 6 State
MODBUS
Coil Title