Eurotherm Drives Metasys N2 User manual

EUROTHERM
DRIVES
Johnson Controls
Metasys N2
Communications
Interface
Technical Manual
HA470901 Issue 1
Copyright Eurotherm Drives Limited 2003
All rights strictly reserved. No part of this document may be stored in a retrieval system, or transmitted in any form or
by any means to persons not employed by a Eurotherm Drives company without written permission from Eurotherm
Drives Ltd.
Although every effort has been taken to ensure the accuracy of this document it may be necessary, without notice, to
make amendments or correct omissions. Eurotherm Drives cannot accept responsibility for damage, injury, or expenses
resulting therefrom.
Compatible with Version 1.x Software
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Cont.2
Please read this information BEFORE installing the equipment.
Intended Users
This manual is to be made available to all persons who are required to install, configure or
service equipment described herein, or any other associated operation.
The information given is intended to highlight safety issues, and to enable the user to obtain
maximum benefit from the equipment.
Application Area
The equipment described is intended for industrial motor speed control utilising AC induction or
AC synchronous machines.
Personnel
Installation, operation and maintenance of the equipment should be carried out by qualified
personnel. A qualified person is someone who is technically competent and familiar with all
safety information and established safety practices; with the installation process, operation and
maintenance of this equipment; and with all the hazards involved.
REFER TO YOUR MAIN PRODUCT MANUAL FOR SPECIFIC SAFETY
INFORMATION ABOUT THE DEVICE YOU ARE CONTROLLING
!
Safety Information
WARRANTY
Eurotherm Drives warrants the goods against defects in design, materials and workmanship
for the period of 12 months from the date of delivery on the terms
detailed in Eurotherm Drives Standard Conditions of Sale IA058393C.
Eurotherm Drives reserves the right to change the content and product specification without notice.
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Contents
Contents Page
Cont.3
JOHNSON CONTROLS N2 TECHNOLOGY OPTION 1
A System Overview........................................................................................... 1
Protocol ........................................................................................................................1
Product Features ...........................................................................................................1
Size Notation – Part Numbers........................................................................................1
Installation ....................................................................................................... 2
JOHNSON CONTROLS N2 Communication Module (HVAC10).....................................2
•Cable Specification.....................................................................................2
•Cable Routing ............................................................................................2
•Earthing/Grounding ...................................................................................2
•User Connections to the Main Serial Port (N2) .............................................3
•DIL Switch (SW1) Settings............................................................................3
•Terminators................................................................................................3
•Terminal Block (TB1) Connections...............................................................3
Fitting and Connecting to the Technology Box ................................................................4
Wiring Diagrams ..........................................................................................................5
Initial Check for Connection ..........................................................................................6
Understanding the LED Indications ................................................................................6
Initial Set-up for Johnson Controls N2............................................................. 8
Configuring the Drive....................................................................................................8
Troubleshooting ............................................................................................. 10
Metasys Point List ........................................................................................................11
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1
Johnson Controls Metasys N2 Communications Interface
JOHNSON CONTROLS N2 TECHNOLOGY OPTION
A System Overview
The Johnson Controls N2 Technology Option provides a serial data port, allowing VSDs
(variable speed drives) to be linked to form a network. Using a Network Control Module, this
network can be continuously controlled to provide supervision and monitoring for each VSD in
the system.
With each unit under local
control, the central
supervisor performs only
periodic setpoint updating,
control sequencing and data
collection.
In the system, the Network
Control Module acts as the
Master, and the VSD as the
Slave.
The network of VSDs can
be set-up using each unit’s
MMI/Operator Station.
Protocol
This card communicates using the Johnson Controls N2 protocol. Any connections made to it
most comply with this protocol. All effort has been made to maintain compatibility with devices
using this protocol.
Product Features
•Suitable for use with:
HVAC10 Drive Products software version 4.6 onwards
•Connection using 2-wire shielded twisted pair (RS485)
•Protocol tag access for defined N2 parameters
Size Notation – Part Numbers
Size 1 HVAC10 drives use the 6053-JMET Metasys N2 Technology Box.
All Size 2 and 3 HVAC10 drives use the 6055-JMET Metasys N2 Technology Box.
Advantages with this type of control system
1. Multi-wire analog transmission from a central programmable
controller is replaced by a bussed digital system using serial
data transmission over differential twisted-pair wires.
2. Digital transmission is fundamentally less noise-prone than
analog methods, and the accuracy of the transmitted data is
unaffected by the transmission medium. The use of intelligent
devices at either end of the data link allows error checking to
be used. This virtually eliminates the effects of electrical noise
on data integrity. It is therefore possible to issue setpoints to
drives with much higher accuracy using this method.
3. The communication standard used allows up to 32 drives to be
connected to a single link which can be driven from a
computer serial port.
4. The chosen standard and protocol are compatible with other
Eurotherm Group products. Temperature controls, process
controls, data loggers and drives can communicate easily with
a common supervisory system.
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2
Johnson Controls Metasys N2 Communications Interface
Installation
WARNING!
Before installing, ensure that the drive and all wiring is electrically isolated and
cannot be made “live” unintentionally by other personnel.
Wait 5 minutes after disconnecting power before working on any part of the
system or removing the covers from the Drive.
JOHNSON CONTROLS N2 Communication Module (HVAC10)
You can create a network of drives by linking a Master to one or more HVAC10 drives fitted
with this module.
Plug this Communication Module on to the front of the HVAC10 drive by removing its terminal
cover and fitting the product to the right-most Technology Box position.
Wiring is very simple - all connections are SELV (Safe Extra Low Voltage).
It is possible to establish serial communications without adhering to the following
recommendations, however, the recommendations will promote greater reliability.
Cable Specification
Use cable which has two twisted pairs, with each pair individually screened as shown. The
characteristic impedance should be in
the range 100 to 165 Ohms.
Recommended Cable Specification
Recommended Cable SpecificationRecommended Cable Specification
Recommended Cable Specification
Characteristic Impedance 100-165Ωat 3-20MHz
Cable Capacitance <30pF/m
Core Diameter 0.34mm² (22 AWG)
Cable Type Twisted pair cable
Resistance <110Ω/km
Shielding Copper braid, or braid & foil
Note: One example: Belden B3079A cable meets the above specification.
Cable Routing
Daisy chain one drive to the next. The supervisor should be at one end of the run. Avoid spurs.
Earthing/Grounding
Connect the screens of both pairs of wires to ground at the supervisor. If possible, connect the
supervisor’s transmitter/receiver 0V reference to earth. Connect all screens as shown in the
following diagrams.
screen
insulation outer sheath
conductors
twisted pair
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3
Johnson Controls Metasys N2 Communications Interface
User Connections to the Main Serial Port (N2)
The serial port on the Option allows the following JOHNSON CONTROLS N2 links to be made.
RS485
RS485RS485
RS485
Electrical Connections 2-wire differential
Number of transmitters and transceivers
allowed per differential pair of wires
32 transceivers
Maximum cable length 4000ft/1200 metres
Technology Box
6053 6055
Technology Box
123456
TB1
Terminal Block
1
2
1
2
PLG1
BISYNCH
1
Switch SW1
Figure 1 Option showing Terminal Block TB1 and DIL Switch SW1
DIL Switch (SW1) Settings
Set this switch to select 2-wire operation, and to switch in a terminator for the last drive in the
system.
Switch
SwitchSwitch
Switch Status
StatusStatus
Status Description
DescriptionDescription
Description
1OFF
ON
4-wire (Not Supported by Metasys)
2-wire
2OFF
ON
Terminator out (default)
Terminator in
Terminators
•The unit logically furthest from the supervisor must have switch 2 set to ON.
•All other units in the system must have switch 2 set to OFF.
The supervisor’s receiver input should also have a terminating resistor, chosen to match the
characteristic impedance of the cable, typically 100 to 165 Ohms.
Terminal Block (TB1) Connections
Terminal No.
Terminal No.Terminal No.
Terminal No. 2-Wire Designation
2-Wire Designation2-Wire Designation
2-Wire Designation
1Notused
2Notused
30V
4 Cable Screen
5N2-
6N2+
1
2
ON
OFF
Switch SW1
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4
Johnson Controls Metasys N2 Communications Interface
Fitting and Connecting to the Technology Box
Figure 2 Plug-in Technology Boxes
WARNING!
Ensure that all wiring is isolated.
IMPORTANT: Remember to set the switch positions on the DIL switch, SW1.
The Technology Option plugs into the right-hand position on the front of the drive, or in place of
the Operator Station/blank cover (SIZE 1 only).
It can be used with the Operator Station fitted, but for the HVAC10 SIZE 1 unit you must mount
the Operator Station remotely using the Panel Mounting Kit with connecting lead (6052). The
connecting lead enters the HVAC10 drive through the gland plate.
•Remove the terminal cover and screws.
•On the HVAC10 unit, plug the ribbon cable into the back of the Technology Box and into the
socket on the drive.
•Click the Technology Box into place in the recess on the front of the drive. If provided,
secure in position by tightening the captive screw on the bottom right hand corner of the
Option. On the SIZE 1 unit it will protrude slightly above the standard plastic enclosure.
•Make all user wiring connections. Refer to the Wiring Diagrams.
•Re-fit the terminal cover securely with the screws.
Technology
Box
Captive Screw
HVAC10 Size 2 & 3
6055
HVAC10 Size 1
Technology
Box
screen connections
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5
Johnson Controls Metasys N2 Communications Interface
Wiring Diagrams
0V
DRIVE
(slave)
123456
0V SCR N2- N2+
123456
0V SCR N2- N2+
N2+ N2-
GND
DRIVE
(slave)
last inverter in chain
ONOFF
1
2
1
2
ONOFF
1
2
1
2
(master)
Network
Control
Module
Figure 3 2-Wire Wiring Diagram for the HVAC10 Size 2 & 3 Drive
0V
DRIVE
(slave)
123456
0V SCR N2- N2+
123456
0V SCR N2- N2+
N2+ N2-
GND
DRIVE
(slave)
last inverter in chain
ONOFF
1
2
1
2
ONOFF
1
2
1
2
(master)
Network
Control
Module
Figure 4 2-Wire Wiring Diagram for the HVAC10 Size 1 Drive
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6
Johnson Controls Metasys N2 Communications Interface
Initial Check for Connection
With the correct connections to the active
Network Control Module, the MODULE
LED will be ON continuously and the
NETWORK LED will indicate the IDLE state
with a flash.
Understanding the LED Indications
Figure 5 Technology Option LEDs
HINT:
The general rule for LED indications is
“ON IS GOOD, OFF IS BAD”
Health and Run LEDs
HVAC10 Size 1 (6053) Technology Box
These LEDs reproduce the indications of the LEDs on the HVAC10 drive that are hidden when
the Technology Box is fitted.
HVAC10 Size 2 & 3 (6055) Technology Box
The board does not have its own Health or Run LEDs. The LEDs are either on the Operator
Station or blank cover.
Module LED
This indicates the set-up state of the Technology Box. The states indicated are those produced by
the FAULT parameter of the TEC OPTION function block.
Module LED Indication
Module LED IndicationModule LED Indication
Module LED Indication FAULT Parameter Indication
FAULT Parameter IndicationFAULT Parameter Indication
FAULT Parameter Indication Description
DescriptionDescription
Description
OFF SELF TEST Initialising
SHORT FLASH HARDWARE Hardware fault
FLASH TYPE MISMATCH Wrong type or disabled
LONG FLASH PARAMETER Set-up fault, parameter
values out-of-range
ON NONE Valid set-up, ready for
external communications
ON MODULE LED
FLASH NETWORK LED
HEALTH
NETWORK
MODULE
RUN
6053 Technology Box
HVAC10 Size 1 HVAC10 Size 2 & 3
TB1
SW1
6055 Technology Box
NETWORK
MODULE
PLG1
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