Cutler-Hammer Jonson Controls N2 User manual

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N2 and XT BUS Communication
User Manual
March 2006
Supersedes January 2006
VSD IntelliPass VSD Open VSD Enclosed Intellipass w/DX-9100

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Important Notice – Please Read
The product discussed in this literature is subject to terms and conditions outlined in
Johnson Controls selling policies. The sole source governing the rights and remedies of any
purchaser of this equipment is the relevant Johnson Controls selling policy.
NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF FITNESS FOR A
PARTICULAR PURPOSE OR MERCHANTABILITY, OR WARRANTIES ARISING FROM COURSE
OF DEALING OR USAGE OF TRADE, ARE MADE REGARDING THE INFORMATION,
RECOMMENDATIONS AND DESCRIPTIONS CONTAINED HEREIN. In no event will Johnson
Controls or Eaton Electrical Inc. be responsible to the purchaser or user in contract, in tort
(including negligence), strict liability or otherwise for any special, indirect, incidental or
consequential damage or loss whatsoever, including but not limited to damage or loss of use of
equipment, plant or power system, cost of capital, loss of power, additional expenses in the use
of existing power facilities, or claims against the purchaser or user by its customers resulting
from the use of the information, recommendations and descriptions contained herein.
The information contained in this manual is subject to change without notice.
Cover Photo: Johnson Controls VSD Series Drives.

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Table of Contents
LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Definitions and Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Hazardous High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
CHAPTER 1 — OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
CHAPTER 2 — BOARD LAYOUT AND CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . 2-1
VS-OPTNX Communication Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
CHAPTER 3 — INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Making the Ground Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Bus Terminal Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
LED Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Installing the VS-OPTNX Communication Board . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
CHAPTER 4 — COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Fieldbus Board Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
RS-485 Communication Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
CHAPTER 5 — JOHNSON CONTROLS METASYS N2 PROTOCOL . . . . . . . . . . . . . . . 5-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
N2 Point Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
CHAPTER 6 — JOHNSON CONTROLS METASYS XT BUS PROTOCOL . . . . . . . . . . . 6-1
DX-9100 XT Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
XT Bus Point Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
CHAPTER 7 — COMMUNICATION BOARD FAULT TRACKING . . . . . . . . . . . . . . . . . . 7-1
APPENDIX A — PROCESS DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Process Data OUT (Slave ➔ Master). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

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List of Figures
Figure 2-1: Option Board VS-OPTNX Communication Board . . . . . . . . . . . . . . . . . . . . . . 2-1
Figure 3-1: Cable Stripping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Figure 3-2: Inserting the Data Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Figure 3-3: Grounding the Communication Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Figure 3-4: Stripping the Communication Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Figure 3-5: Grounding the Communication Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Figure 3-6: Using Jumper X4 to Set the Bus Termination . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Figure 3-7: LED Indications on the Communication Board . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Figure 4-1: Communication Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Figure 6-1: Define VSD Analog Points by Selecting the 6AI,
2AO XT Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Figure 6-2: Assign User Names and the Hardware Address for
the XT Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Figure 6-3: Define VSD Digital Points by Selecting the 4DI,
4DO XT Expansion Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Figure 6-4: Assign User Names for the XT Expansion Module . . . . . . . . . . . . . . . . . . . . . 6-3
Figure 6-5: Define All of the VSD/XT Analog Inputs as “Active” . . . . . . . . . . . . . . . . . . . 6-4
Figure 6-6: Define the VSD/XT Active Analog Inputs as Noted in Table 6-1 . . . . . . . . . . . 6-4
Figure 6-7: Define the VSD/XT Digital Inputs as Noted in Table 6-3 . . . . . . . . . . . . . . . . . 6-5
Figure 6-8: Assign User Names and Define the VSD/XT Analog Outputs
as Noted in Table 6-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Figure 6-9: Define the VSD/XT Digital Outputs as ON/OFF Type . . . . . . . . . . . . . . . . . . . 6-6
Figure 6-10: Assign User Names for the VSD/XT Digital Outputs
as Noted in Table 6-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Figure 6-11: After Saving the File — Download the DX and XT from
the “Action” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
List of Tables
Table 1-1: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table 2-1: VS-OPTNX Bus Connector Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Table 3-1: Communication Board Status LED (BS) — YELLOW . . . . . . . . . . . . . . . . . . . . 3-4
Table 3-2: Fieldbus Status LED (FS) — GREEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Table 3-3: Installing the VS-OPTNX Communication Board . . . . . . . . . . . . . . . . . . . . . . . 3-5
Table 4-1: Changing the N2/XT Bus Board Commissioning Parameter Values . . . . . . . . 4-1
Table 4-2: Communication Message Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Table 5-1: Analog Inputs (AI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Table 5-2: Binary Inputs (BI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Table 5-3: Analog Outputs (AO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Table 5-4: Binary Outputs (BO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Table 5-5: Internal Integers (ADI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Table 6-1: Analog Inputs (AI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Table 6-2: Analog Outputs (AO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Table 6-3: Digital Inputs (DI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Table 6-4: Digital Outputs (DO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Table 7-1: Communication Board Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Table 7-2: VSD Response to Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Table A-1: Fieldbus Parameters — M1 ➔ G1.9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

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Safety
Definitions and Symbols
WARNING
This symbol indicates high voltage. It calls your attention to items
or operations that could be dangerous to you and other persons
operating this equipment. Read the message and follow the
instructions carefully.
This symbol is the “Safety Alert Symbol.” It occurs with either of
two signal words: CAUTION or WARNING, as described below.
WARNING
Indicates a potentially hazardous situation which, if not avoided,
can result in serious injury or death.
CAUTION
Indicates a potentially hazardous situation which, if not avoided,
can result in minor to moderate injury, or serious damage to the
product. The situation described in the CAUTION may, if not
avoided, lead to serious results. Important safety measures are
described in CAUTION (as well as WARNING).
Hazardous High Voltage
WARNING
Motor control equipment and electronic controllers are connected
to hazardous line voltages. When servicing drives and electronic
controllers, there may be exposed components with housings or
protrusions at or above line potential. Extreme care should be taken
to protect against shock.
Stand on an insulating pad and make it a habit to use only one
hand when checking components. Always work with another
person in case an emergency occurs. Disconnect power before
checking controllers or performing maintenance. Be sure
equipment is properly grounded. Wear safety glasses whenever
working on electronic controllers or rotating machinery.

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Chapter 1 — Overview
Introduction
The Johnson Controls VSD Series Drives powered by Cutler-Hammer
®
technology from
Eaton’s electrical business can be controlled, monitored and programmed from a host
system via Johnson Controls N2 or XT BUS communication protocols with the addition of
the VS-OPTNX RS-485 Communication Option Board.
If you purchase your Communication Board separate from the drive, please note that it must
be installed in slot D or E on the control board of the VSD Series drive.
Specifications
Table 1-1: Specifications

The N2/XT Bus is a “daisy chain” communications line. It consists of three wires for the following signals: +, –, and Common. The
+ and – lines carry the actual data signals. The Common line provides a reference so that each connected device is capable of elec-
trically receiving and transmitting data by creating a common voltage reference among all the devices connected together over
the communication bus. Three conductors are required. It is important that the + and – lines are twisted together, which allows
most induced noise (common-mode noise) from external sources to affect both lines equally, thereby canceling the noise. In most
installations, the communication bus works fine with unshielded cable. However, in noisy environments, shielded twisted wire
must be used.
Item Specification
Communication Board Connections
Interface VS-OPTNX: Pluggable connector (5.08 mm)
Data Transfer Method RS-485, half-duplex
Communication Bus 3-wire (Twisted pair + Reference) shield optional

Electrical Isolation 500V DC
Communications
Johnson Controls N2 Bus As described in Metasys N2 System Protocol Specification
Johnson Controls XT Bus As described in Metasys System 9100 Protocol Specification
Baud Rate 9600 baud
Addresses 1 to 247
Environment
Ambient Operating Temperature 14 to 131°F (-10 to 55°C)
Storage Temperature -40 to 140°F (-40 to 60°C)
Humidity <95%, non-condensing
Altitude Max. 3280 ft. (1000m)
Vibration 0.5G at 9 to 200 Hz
Safety
Standards Fulfils EN 50178 standard
Certification CE, UL

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Chapter 2 — Board Layout and Connections
The VS-OPTNX RS-485 Communication Board is connected to the communications bus
through a 5-pin pluggable bus connector.
Communication with the control board of the drive takes place through the standard Interface
Board Connector (see Figure 2-1 ).
VS-OPTNX Communication Board
Figure 2-1: Option Board VS-OPTNX Communication Board
Table 2-1: VS-OPTNX Bus Connector Signals

This pin (1) can be used to bypass the cable shield to the next slave.
X4 jumper is the 120 Ω termination resistor. Set X4 jumper to ON only if the
Johnson Controls N2 Protocol is selected and the drive is the last device on the
network. N/A for XT bus communication.
X1 jumper has no effect on VS-OPTNX board.
Signal Connector Description
SHLD

1

Shield
VP 2 Supply voltage – plus 5V (not used)
- 3 Receive/Transmit data – minus (N2-/RT-)
+ 4 Receive/Transmit data – plus (N2+/RT+)
COM 5 Bus Common (REF/COM)
1
2
3
4
5
Interface Board Connector
Jumpers
X1
X
Yellow = RS-485 Board Status
Green= Field Bus Status
4
Bus Connector
ON
OFF

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Chapter 3 — Installation
Making the Communication Bus and Ground Connections
Terminating the Ground Wire
Note: Normally, the option board has already been installed in slot D or E of the control
board. It is not necessary to detach the whole board to connect the communication bus
and ground the bus cable shield. Just detach the terminal block.
1. Strip about 2 in. (5 cm) of the communication cable and cut off the gray cable shield.
Remember to do this for both bus cables (except for the last device). See Figure 3-1 .
2. Strip the individual conductors at about 0.2 in (0.5 cm) to fit in the terminals. See Figure
3-1 .
Figure 3-1: Cable Stripping
3. Insert the data cables into terminals #3 (-), #4 (+) and #5 (Com.).
Figure 3-2: Inserting the Data Cables
345
-+
21
Com.
To next
N2/XT Bus
Device
From
Previous
N2/XT Bus
Device

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Grounding by Clamping the Cable to the Converter Frame
This method of grounding is the most effective, and especially recommended when the
distances between the devices are relatively short.
Strip the communication cable so that it can be secured to the drive frame with the
grounding clamp.
Figure 3-3: Grounding the Communication Cable
Grounding Only One Point on the Net
In this method of grounding, the shield is connected to ground only at the last device on the
network. Other devices on the network just bypass the shield.
1. Strip about 2 in. (5 cm) of the communication cable and cut off the gray cable shield.
2. Leave no more than 1/4 in. (1 cm) of the cable outside the terminal block and strip the
data cables at about 0.5 cm to fit in the terminals. See Figure 3-4 .
Figure 3-4: Stripping the Communication Cables
345
-
+
21
Shield Com.

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3. Secure the communication cable to the drive frame with the grounding clamp as shown
in Figure 3-5 .
Figure 3-5: Grounding the Communication Cable
Bus Terminal Resistors
If the VS-OPTNX Option Card is programmed for N2 communication and it is the last device
on the network, the bus termination must be set to ON. Use jumper X4 (set to the ON
position for termination). See Figure 3-6 .
Figure 3-6: Using Jumper X4 to Set the Bus Termination
1
2
3
4
5
Interface Board ConnectorJumpers
X1
X4
Bus Connector
ON = Terminated: This is the last device onN2 bus network.
OFF = Not Terminated: At least one other N2 bus network
device is connected past this device.

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LED Indications
The two LED indicators next to the connector show the present status of the Communication
Board (yellow) and the Fieldbus Module (green).
Figure 3-7: LED Indications on the Communication Board
Table 3-1: Communication Board Status LED (BS) — YELLOW
Table 3-2: Fieldbus Status LED (FS) — GREEN
LED is: Meaning:
OFF Option board not activated
ON Option board in initialization state waiting for activation command from
the Variable Speed Drive (VSD)
Blinking fast (once/sec) Option board is activated and in RUN state
Option board is ready for external communication
Blinking slow (once/5 secs) Option board is activated and in FAULT state
Internal fault of option board
LED is: Meaning:
OFF Fieldbus module is waiting for parameters from the VSD
No external communication
ON Fieldbus module is activated
Parameters received and module activated
Module is waiting for messages from the bus
Blinking fast (once/sec) Module is activated and receiving messages from the bus
Blinking slow (once/5 secs) Module is in FAULT state
No messages from Master within the watchdog time
Bus broken, cable loose or Master off-line
1
2
3
4
5
X1
X4
Yellow
Yellow
Green
Green
= RS-485 Board Status
= Fieldbus Status

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Installing the VS-OPTNX Communication Board
Table 3-3: Installing the VS-OPTNX Communication Board
Procedure Illustration
1. Remove the cable cover.
2. Open the cover of the control unit.
3. Install the VS-OPTNXC2 option board in slot D or E on the
control board of the VSD. Make sure that the grounding
plate (see below) fits tightly in the clamp.
2
3
4
5
X1
X4
Grounding Plate
1

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Table 3-3: Installing the VS-OPTNX Communication Board, continued
Procedure Illustration
4. Make a sufficiently wide opening for your cable by cutting
the cover grid as wide as necessary.
5. Close the cover of the control unit and the cable cover.

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Chapter 4 — Commissioning
Fieldbus Board Parameters
The VS-OPTNX RS-485 Communication board is commissioned with the control keypad by
selecting values for the appropriate parameters in the Expander board menu M6.
Expander Board Menu (M6)
The Expander board menu makes it possible for the user, (1) to see what expander boards
are connected to the control board and (2) to view and edit the parameters associated with
the expander board. See the step-by-step procedure to commission the RS-485
communication board below.
RS-485 Communication Parameters
Table 4-1: Changing the N2/XT Bus Board Commissioning Parameter Values
The parameters of every device must be set before connecting to the bus. The parameter
“SLAVE ADDRESS” must be the same as programmed in the master configuration. (N2
Supervisory System or DX 9100 device.)
Perform the Following Steps to Commission the RS-485 Communication Board
●From Operate Menu to
●Programing Press
●to M6 (Expander boards / G1-G5)
●to G6.4 (D:OPTCC / G1-G2) or G6.5 (E:OPTCC / G1-G2)
●G6.4.1 (Parameters P1-P3) or G6.5.1 (Parameters P1-P3)
●P6.4.1.1 or P6.5.1.1 (Comm. Protocol) N2 , or XT
Note: If… G6.4 (Slot D: or E: = OPTC2) and P6.4.1.1 or P6.5.1.1 (Comm. Protocol)
ModBus, or N2, the RS-485 card in the drive is the VS-OPTC2 comm. card not the
VS-OPTNX comm. card. The RS-485 comm. card can be reprogrammed with the VS-
OPTNX firmware using the 9000X Load software available on the Johnson Controls
Portal (or the Exchange website). See the notes on Page 4-2 or contact JCI Field
Support Center for further information.
●P6.4.1.2 or P6.5.1.2 (Slave Address) 1 to 247
●P6.4.1.3 or P6.5.1.3 (Comm. Timeout) 0 to 10 seconds
●To Main Menu
●to M8 (Operate Mode Press )
# Name Default Range Description
1 Communication
Protocol
1 1 – N2 Bus
2 – XT Bus
3 – SA Bus
Metasys N2 bus communication
Metasys DX-9100 XT bus communication
Metasys MS/TP BACnet Communications
(future)
2 Slave Address 1 1…247
3 Communication
Timeout
10 0 – OFF
1 – 300 s
See Communication Timeout on Page 4-2

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Procedure to Check the RS-485 Communication Software Revision
●From Operate Menu to
●Programing Press
●to M5 (System Menu / S1 – S11)
●to S5.8 (System Info / I1 – 17)
●to S5.8.6 (Expander boards / E1 – E5)
●to E5.8.6.4 (D:OPTCC / E1 – E2) or E5.8.6.5 (E:OPTCC / E1 – E2)
●to E5.8.6.4.2 (Program version), or E5.8.6.5.2 (Program version)
10610.6 = VS-OPTNX software (N2/XT) standard for VSD Series drives (No further action
needed).
If the comm. card revision displays …
10605.3 = VS-OPTC2 (pre-release software N2/XT) or …
10514.15 = VS-OPTC2 software (ModBus/N2) standard for Eaton drives (Perform the
following steps)
!
IMPORTANT
The RS-485 card must be in option card slot E when running the
C2toCC.exe program.
1. Run the executable file “C2toCC.exe” that is required to convert the ID of the RS-485
card so the drive will recognize the comm. card as the VS-OPTNX.
2. Download the System Software (SVX00031V015.vcn).
3. Download the JCI Application Wizard software (JCX0001V215.vcn).
4. Download the RS-485 communication card with the N2/XT protocol file (NXOPTC2_
10610V006.vcn).
Following these 5-steps will insure your drive is operating with the latest software revisions.
Note: Skip Steps 2 and 4 if the VSD Series Drive order was placed on/after January 13, 2006.
Communication Timeout
The RS-485 communication board initiates a communication error if communication is
broken for as long as defined by Communication Timeout. Communication Timeout is
disabled when given the value 0.

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Powered by Eaton’s Cutler-Hammer Technology N2 and XT BUS Communication User Manual
Communication Status
To see the present status of the communication board, enter the Communication status page
from the Monitor menu (G6.4.2). See Figure 4-1 and Table 4-2.
Figure 4-1: Communication Status
Table 4-2: Communication Message Indications
Messages Indications
Good messages
0 – 999 Number of messages received without communication errors
Error messages
0 – 64 Number of messages received with CRC or parity errors
Comm. status
Monitor
V1 V1 0.841
Good Message Count
Error Message Count

4-4 For more information visit: www.johnsoncontrols.com Code No. LIT-1201829
March 2006
N2 and XT BUS Communication User Manual Powered by Eaton’s Cutler-Hammer Technology