7

78(96)

Control Keypad

Honeywell

 

7.4.8.2Termination Resistor

The RS-485 bus is terminated with 120 Ω termination resistors in both ends. NXL has a built-in termination resistor which is switched off as a default. See the jumper selections in chapter 6.2.5.1

7.4.8.3Modbus address area

The Modbus bus of NXL uses the ID numbers of the application as addresses. The ID numbers can be found in the parameter tables of the Application manual.

When several parameters/monitoring values are read at a time they must be consecutive. 11 addresses can be read and the addresses can be parameters or monitoring values.

7.4.8.4Modbus process data

Process data is an address area for fieldbus control. Fieldbus control is active when the value of parameter 3.1 (Control place) is 2 (=fieldbus). The contents of the process data has been determined in the application. The following tables present the process data contents in the Multi- Control Application.

Output Process data

Addr.

2101

2102

2103

2104

2105

2106

2107

2108

2109

2110

2111

 

Modbus register

 

Name

 

Scale

 

Type

 

 

 

 

 

 

32101, 42101

 

FB Status Word

-

 

Binary coded

 

32102, 42102

 

FB General Status Word

-

 

Binary coded

 

32103, 42103

 

FB Actual Speed

0,01

%

 

32104, 42104

 

Motor speed

0,01

 

+/- Hz

 

32105, 42105

 

Motor speed

1

 

+/- Rpm

 

32106, 42106

 

Motor current

0,1

 

A

 

32107, 42107

 

Motor Torque

0,1

 

+/- % (of nominal)

 

32108, 42108

 

Motor Power

0,1

 

+/- % (of nominal)

 

32109, 42109

 

Motor Voltage

0,1

 

V

 

32110, 42110

 

DC Voltage

1

 

V

 

32111, 42111

 

Active Fault

-

 

Fault code

 

 

 

 

 

 

 

 

 

 

Input Process data

Addr.

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

Modbus register

 

Name

Scale

 

Type

32001, 42001

 

FB Control Word

-

 

Binary coded

32002, 42002

 

FB General Control Word

-

 

Binary coded

32003, 42003

 

FB Speed Reference

0,01

%

32004, 42004

 

PID Control Reference

0,01

%

32005, 42005

 

PID Actual Value

0,01

%

32006, 42006

 

-

-

-

32007, 42007

 

-

-

-

32008, 42008

 

-

-

-

32009, 42009

 

-

-

-

32010, 42010

 

-

-

-

32011, 42011

 

-

-

 

-

Page 78
Image 78
Honeywell NXL user manual Control Keypad, Termination Resistor, Modbus address area, Modbus process data

NXL specifications

Honeywell NXL is an advanced building management system designed to optimize the efficiency of HVAC, lighting, and security systems within commercial buildings. It incorporates cutting-edge technologies to enhance operational performance, improve energy savings, and provide a comfortable environment for occupants.

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