Evolution Controls EVO/ECM-Modbus Guida utente

Evolution

©Evolution Controls Inc.

10-Sept-2020

.. CONTROLS INC. EVO/™ECM-Modbus

EVO/™ECM-Modbus RTU Series 2 Voice 858.748-7359

Application Guide Fax 858.679-3365

Evolution Controls Inc.

San Diego, CA USA

http://www.gotoevo.com/

©Evolution Controls Inc.

10-Sept-2020

EVO/ECM-Modbus RTU Series 2

Application Guide

Evolution Controls Inc.

San Diego, CA USA

Contents

DESCRIPTION................................................................................................................................... 1

Mounting ........................................................................................................................................ 3

Enclosure ........................................................................................................................................ 4

WIRING........................................................................................................................................... 5

Power Connection ...........................................................................................................................................5

Trunk Connection............................................................................................................................................5

Motor Connection ...........................................................................................................................................6

PWM Motor Output...................................................................................................................................................6

0-10 VDC Motor Output ............................................................................................................................................7

PROTOCOL ...................................................................................................................................... 8

Register Usage ................................................................................................................................................8

Dynamic Registers .......................................................................................................................................................8

Read Only Registers.....................................................................................................................................................8

Default Registers .........................................................................................................................................................9

Configuration Registers................................................................................................................................................9

RPM Alarm Limit Registers ...........................................................................................................................................9

Register Assignments.....................................................................................................................................10

Register 1 - On/Off Control and Status.........................................................................................................................10

Register 2 - Motor 1 - % Out .......................................................................................................................................11

Register 3 - Motor 2 - % Out .......................................................................................................................................12

Register 4 - Motor 3 - % Out .......................................................................................................................................12

Register 5 - Motor 4 - % Out .......................................................................................................................................12

Register 6 - Motor 1 –RPM.........................................................................................................................................12

Register 7 - Motor 2 - RPM .........................................................................................................................................12

Register 8 - Motor 3 - RPM .........................................................................................................................................12

Register 9 - Motor 4 - RPM .........................................................................................................................................12

Register 10 - Motor 1 –Default % Out .........................................................................................................................13

Register 11 - Motor 2 –Default % Out .........................................................................................................................13

Register 12 - Motor 3 –Default % Out .........................................................................................................................13

Register 13 - Motor 4 –Default % Out .........................................................................................................................13

Register 14 - Configurations........................................................................................................................................13

Register 15 - Group1 Address .....................................................................................................................................16

Register 16 - Group 2 Address.....................................................................................................................................16

Register 17 - Unit Address ..........................................................................................................................................17

Register 18 - Baud Rate ..............................................................................................................................................17

Register 19 - Motor 1 Low RPM Limit...........................................................................................................................17

Register 20 - Motor 2 Low RPM Limit...........................................................................................................................17

Register 21 - Motor 3 Low RPM Limit...........................................................................................................................17

Register 22 - Motor 4 Low RPM Limit...........................................................................................................................18

Register 23 - Motor 1 High RPM Limit..........................................................................................................................18

Register 24 - Motor 2 High RPM Limit..........................................................................................................................18

Register 25 - Motor 3 High RPM Limit..........................................................................................................................18

Register 26 - Motor 4 High RPM Limit..........................................................................................................................18

EVO/ECM-Modbus RTU protocol ....................................................................................................................19

Read Registers Command (03) ....................................................................................................................................19

Write Single Register Command (06) ...........................................................................................................................20

©Evolution Controls Inc.

10-Sept-2020

EVO/ECM-Modbus RTU Series 2

Application Guide

Evolution Controls Inc.

San Diego, CA USA

Write Multiple Registers Command (16) ......................................................................................................................21

Read Multiple Coil Registers Command (01).................................................................................................................22

Write Single Coil Register Command (05) .....................................................................................................................23

ADDRESSING.................................................................................................................................. 24

INTEGRATION ................................................................................................................................ 26

BACnet IP......................................................................................................................................................26

Modbus to BACnet Gateway.......................................................................................................................................27

BACnet Mapping .......................................................................................................................................................28

Babel Buster SPX Gateway Setup Procedure.................................................................................................................29

Modbus to BACnet Integration Procedure....................................................................................................................40

CONFIGURATION............................................................................................................................ 45

Configuration Tool.........................................................................................................................................45

EVO/ECM-ModBus Registers Coils............................................................................................. 47

©Evolution Controls Inc.

10-Sept-2020

EVO/™ECM-Modbus RTU Series 2 Page 1

Application Guide

Evolution Controls Inc.

San Diego, CA USA

DESCRIPTION

EVO/™ECM-Modbus

The EVO/ECM-Modbus RTU (Remote Terminal Unit)

allows an industrial or building automation system to

monitor and control Electronically Commutated

Motors (ECM) over an industry standard Modbus

RTU serial data link. Each RTU connects to four ECM

Motors.

ECM motors are fractional horsepower blower motors featuring an internal microprocessor to

provide exceptional efficiency, performance, and motor life. The motor may be programmed for

constant airflow or constant torque.

Modbus is an industry standard communications protocol allowing connection to most industrial

and building automation systems.

The EVO/ECM-Modbus RTU allows the automation system to control each motor's output and

on/off; monitor each motor's RPM and control status; and set default values used during power

up and communications interruptions.

A four-conductor low voltage control cable connects each motor to the RTU. Low voltage on/off

control is provided over the control cable by direct connection to the motor. External relays or

starters are not required for ECM Motors.

The EVO/ECM-Modbus RTU allows adjustment of the motor output from 0% to 100% of the

programmed control range. The ECM motor sends a signal from its commutator circuit to the RTU.

The RTU translates this signal to a 0-1500 RPM value.

During operation, the automation system may dynamically change motor outputs, and turn

motors on and off to meet current operating needs. Should communications from the

automation system fail, the EVO/ECM-Modbus RTU can be set to hold the last commanded values

from the automation system or revert to defaults stored in the RTU's non-volatile memory.

Defaults are invoked on power up. Defaults are overridden when communication is established,

and dynamic values sent to the RTU.

©Evolution Controls Inc.

10-Sept-2020

EVO/™ECM-Modbus RTU Series 2 Page 2

Application Guide

Evolution Controls Inc.

San Diego, CA USA

Notes…

©Evolution Controls Inc.

10-Sept-2020

EVO/™ECM-Modbus RTU Series 2 Page 3

Application Guide

Evolution Controls Inc.

San Diego, CA USA

Mounting

Mount the EVO/ECM-Modbus RTU inside a metal control cabinet or enclosure. Make sure the

enclosure is earthed. When mounting the low voltage power transformer in the same enclosure,

be sure to separate the high and low voltage sections of the enclosure, as required by good safety

practice, and building codes.

To reduce EMI (electro-magnetic interference), tightly fasten the control mounting posts to an

earthed metal surface of the enclosure. Ensure good electrical contact between the mounting

posts and electrical ground.

Low voltage communications and motor control wiring can be routed into the low voltage section

of the metal enclosure or be plugged into opening in the side of the enclosure. All external

connections are made to one side of the board. Make a rectangular cutout in the side of the

enclosure when the application requires external plug in of motor and communication cables.

2.69"

2.48"

1.78”

0.34”

3.83”

3.62"

1.79”

0.42”

Board Dimensions

©Evolution Controls Inc.

10-Sept-2020

EVO/™ECM-Modbus RTU Series 2 Page 4

Application Guide

Evolution Controls Inc.

San Diego, CA USA

Enclosure

These drawings detail the minimum inside floor and face dimensions for a suitable enclosure.

1.20”

2.20” 3.58”

4.25”

1.00”

0.20"

0.61”

0.90”

0.12”

0.38”

3.36”

Inside Face

3.58”

0.90”

2.75”

2.20”

0.38”Ø 0.25”

0.21”2.34”

Inside Floor

©Evolution Controls Inc.

10-Sept-2020

EVO/™ECM-Modbus RTU Series 2 Page 5

Application Guide

Evolution Controls Inc.

San Diego, CA USA

WIRING

POWER CONNECTION

Power the EVO/ECM-Modbus RTU with a ~24V 50/60 Hz 10 VA low voltage

power source. Connect the hot side of the power source to the ~24V

connection. Connect the neutral side of the power source to the neutral

connection. Observe all building and electrical code requirements

concerning low voltage power sources and wiring to insure a safe, reliable

installation. In most jurisdictions the neutral must be earthed.

TRUNK CONNECTION

A single trunk routes from one EVO/ECM-Modbus RTU to the next, connecting up to 31 RTUs to

the Modbus RTU master. The trunk may be up to 4000 feet long. Connect a 120-ohm 1/4-Watt

terminating resister at each end of the trunk. The most common connection places the Modbus

RTU master at one end of the trunk. Many Modbus RTU masters have a non-removeable built in

terminator or use an impedance altering means to provide line bias. These masters must be

placed at the end of the line.

When possible, placing the Modbus RTU master in the center of the trunk improves application

versatility, often reduces installation costs, and improves communications reliability.

The trunk cable field terminates to a plug-in connector at each RTU. Use a twisted pair cable with

an overall foil shield. Recommend the use of EIA RS-485 cable 22-24 AWG twisted and balanced,

with an impedance of 100-130 ohms, a capacitance below 100 pF per meter (30 pF per foot), with

a braided shield. Connect the shield to the Shield/Common terminal at each RTU as shown in the

picture below. Do not ground the shield at the RTUs. The shield must be chassis grounded at the

master only.

The shield wire is usually not insulated. Keep the shield leads short between the cable sheath and

the shield connection. Let the other wires be longer!

EVO/ECM-Modbus EVO/ECM-Modbus EVO/ECM-Modbus EVO/ECM-ModbusEVO/ECM-Modbus

Modbus Master EVO/ECM-Modbus

EVO/ECM-Modbus EVO/ECM-Modbus EVO/ECM-Modbus EVO/ECM-Modbus EVO/ECM-Modbus EVO/ECM-ModbusModbus Master

Neutral

24Vac 50/60 Hz

Ground

EVO/ECM-Modbus

©Evolution Controls Inc.

10-Sept-2020

EVO/™ECM-Modbus RTU Series 2 Page 6

Application Guide

Evolution Controls Inc.

San Diego, CA USA

Traditionally, a Modbus trunk requires a pair of external resistors to pull up and pull down the two

trunk wires to maintain the trunk at a known biasing voltage when no device is communicating.

The EVO/ECM-Modbus is equipped with internal failsafe biasing so no external biasing is required.

EVO™/ECM-Modbus communications is half-duplex. All devices contain a transmitter and a

receiver. Only one transmitter on a trunk can be transmitting at a time. All other devices on

the trunk (Master and RTU slaves) must be in receive.

When a Master finishes sending, it must

quickly "turn-around" so it is ready to

receive a reply from the RTU.

The EVO™/ECM-Modbus reply is very fast. Some Masters, especially those where turn-around is

controlled over a higher-level network (server architecture) cannot turn around fast enough to

receive the RTU's reply. The Reply Delay flag in register 14 can be set to

delay the RTU's reply.

MOTOR CONNECTION

PWM Motor Output

A four-conductor cable connects each motor to

the EVO/ECM-Modbus RTU output connector.

Plug the motor end of the cable into the motor

and plug the circuit board end into motor

connection 1, 2, 3, or 4 on the RTU.

The motor control cable may be up to 150 meters

(500’) long.

Motor cables are prefabricated, with an

ECM Motor connector on one end, and a

small 4-pin circuit board connector on the

other.

Order

Motor Cable ECM-CBL_ _

Custom Lengths substitute the length in feet

for the last two digits.

Order connectors from

Digikey PN ED1702-ND

http://www.digikey.com

Communications

Motor

10-Sept-2020

EVO/™ECM-Modbus RTU Series 2 Page 7

Application Guide

Evolution Controls Inc.

San Diego, CA USA

Some applications may not be suitable for prefabricated cables. Cut a short cable in half, and

splice cable in between as needed for the application. Cables can be field fabricated using the

parts and tooling identified on the cable drawing. (The pneumatic bench tool can be used in the

field and is preferred over a hand-operated tool.)

0-10 VDC Motor Output

The length of the 0-10 VDC motor control cable is more limited by the line loss and the amount of

electrical noise interference. The ECM-Modbus RTU’s 0-10 VDC is rated at 10 mA. The rough

guideline for maximum cable length is 45 meters (150’) for 22 awg wire and 90 meters (300’) for

18 awg wire.

Depending on the programming of the motor, the RPM and Go signals may not be used for a 0-10

VDC controlled motor. If that the case, only the Red and Green wires of the EVO/ECM-CBL-?? are

used.

Indice

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