Yaskawa SmartTrac DeviceNet Card User Manual

Technical Manual

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SMART TRAC DeviceNet Card

Contents

Important Safety and Warranty Information 1

Warnings, Cautions and Notes.....................................................................................................................1

General Safety Precautions - Warnings ......................................................................................................2

Important Warranty Information................................................................................................................2

Smart Trac DeviceNet Card 3

General Capabilities......................................................................................................................................3

Smart Trac AC1 on a DeviceNet Network ..................................................................................................3

Specifications .................................................................................................................................................4

Quick Start.....................................................................................................................................................4

DeviceNet Basics 5

Introduction...................................................................................................................................................5

DeviceNet Network Topology..........................................................................................................6

Network Length ................................................................................................................................7

Thick Cable Specifications................................................................................................................8

Thin Cable Specifications .................................................................................................................8

Terminating Resistor Specifications .................................................................................................9

DeviceNet Connector........................................................................................................................9

Installing the Smart Trac DeviceNet Card 11

Unpacking ....................................................................................................................................................11

Electrostatic Sensitive Discharge (ESD) Procedures ......................................................................11

Unpacking Procedure......................................................................................................................11

Installing the Smart Trac DeviceNet Card................................................................................................11

Connecting the Smart Trac DeviceNet Card to a DeviceNet Network...................................................13

Configuring the Smart Trac DeviceNet Card 17

Configuration...............................................................................................................................................17

Default Settings............................................................................................................................................17

Non-Default Settings ...................................................................................................................................17

Interrupt...........................................................................................................................................17

Base I/O Address.............................................................................................................................18

Testing Card Installation 19

Testing the Network....................................................................................................................................19

General Test Parameters..................................................................................................................19

Network Termination & Signal Wires ............................................................................................19

Shield ..............................................................................................................................................19

Grounding .......................................................................................................................................19

Technical Manual 3554-0070 Contents •• i

SMART TRAC DeviceNet Card

Network Power - Minimum supply voltage....................................................................................20

Network Power - Common Mode Voltage......................................................................................20

MAC ID/ Baud Rate Settings..........................................................................................................20

On-board Indicator Lights .........................................................................................................................20

Module and Network Status LEDs at Power-Up......................................................................................22

Troubleshooting Your Smart Trac DeviceNet Card 23

Status and Error Messages.........................................................................................................................23

Troubleshooting DeviceNet Network Problems........................................................................................25

Appendix A – Technical Support 27

Technical Support .......................................................................................................................................27

References ....................................................................................................................................................27

Problem Report ...........................................................................................................................................28

Appendix B – Replaceable Parts 29

Replaceable Parts Listing ...........................................................................................................................29

Appendix C – Removing the Smart Trac Card Stack 31

General Procedures.....................................................................................................................................31

Glossary of Terms 35

Index 37

ii •• Contents Technical Manual 3554-0070

SMART TRAC DeviceNet Card

Important Safety and Warranty Information

Warnings, Cautions and Notes

WARNING

A statement of conditions which MUST BE OBSERVED to

prevent personal injury or death.

WARNING - ESD

A statement of conditions which must be observed to prevent damage to components due to ESD (ElectroStatic Discharge) and to prevent personal injury or death.

CAUTION

A statement of conditions which must be observed to prevent undesired equipment faults, Smart Trac AC1 system degradation and damage to equipment.

IMPORTANT

A statement of conditions which should be observed during Smart Trac AC DeviceNet setup or operation to ensure dependable service.

NOTE: Notes indicate information that is in addition to a discussion of the topic in adjoining text. Alternatively, it may limit or restrict the paragraph(s) that follow(s) to specific models or conditions.

TIP - Tips indicate information that should make a procedure easier or more efficient.

Technical Manual 3554-0070 Important Safety and Warranty Information •• 1

SMART TRAC DeviceNet Card

General Safety Precautions Warnings

Important safety information follows. Please read and understand all precautions listed below before proceeding with the specification, installation, set-up or operation of your Smart Trac AC1. Failure to follow any of the following precautions may result in personal injury or death, or damage to the equipment.

WARNING - ESD

The Control Printed Circuit Board (PCB) employs CMOS Integrated Circuits that are easily damaged by static electricity. Use proper ElectroStatic Discharge (ESD) procedures when handling the Control PCB. See Smart Trac AC1 Technical Manual for details. Failure to comply may result in damage to equipment

and/or personal injury.

Important Warranty Information.

Do not modify your Smart Trac AC1, its components, or any of the procedures contained in the technical documentation supplied by MagneTek. Any modification of this product by the user is not the responsibility of MagneTek and will void the warranty.

2 •• Important Safety and Warranty Information Technical Manual 3554-0070

SMART TRAC DeviceNet Card

Smart Trac DeviceNet Card

General Capabilities

Adding the Smart Trac DeviceNet Card to your Smart Trac AC1 makes it fully compatible with other industrial devices (i.e., drives, limit switches, operator interfaces, programmable controllers) conforming to the DeviceNet standard. It also complies with CAN (Controller Area Network) specification 2.0, parts A and B, Standard Frame Identifiers.

The card also conforms to PC/104 specifications and has its own central processing unit (CPU). It supports DeviceNet data rates of 125 Kbaud, 250 Kbaud and 500 Kbaud.

While DeviceNet supports up to 64 nodes identified by MAC IDs, the Smart Trac DeviceNet card uses one MAC ID, leaving 63 other device nodes available to be addressed.

The Smart Trac DeviceNet driver supports Polled I/O and Bit Strobed I/O connections as well as explicit messaging. It supports all ODVA (Open DeviceNet Vendor Association) approved devices.

Smart Trac AC1 on a DeviceNet Network

With a Smart Trac DeviceNet card and driver installed and connected to a DeviceNet network, the Smart Trac AC1 communicates in a Master/Slave relationship (as opposed to peer-to-peer). A Smart Trac AC1 with an installed Smart Trac DeviceNet card serves as Master of a DeviceNet network. The Master gathers and distributes I/O data for the process controller. It also gathers I/O data from Slave devices and distributes the data to Slave devices.

On a DeviceNet Master/Slave network, a Master device "owns" a Slave device. A Slave device can be "owned" by only one Master. Except for a check for duplicate MAC IDs, a slave cannot initiate communication transactions unless it has been told to do so by its Master. The Master (in this case, the Smart Trac DeviceNet card) scans its Slave devices based on a scan list that it contains. The Slaves' MAC IDs appear in the Master's scan list of I/O addresses to be scanned by the card at specified intervals.

Smart Trac systems support single master networks. Only one Smart Trac DeviceNet Card is allowed per network.

Technical Manual 3554-0070 Smart Trac DeviceNet Card •• 3

SMART TRAC DeviceNet Card

Specifications

• 16 MHz V40 microprocessor with 128 Kbytes RAM

• Software configurable interrupts 2, 5 and 7 (7 normally used)

• DeviceNet compatible 5-pin connector

• Network status bicolor indicator

• Operating temperature 32° to 104°F (0° to 40° C)

• Storage temperature -4° F to 140°F (-20° to 60° C)

• Operating Humidity 5% to 90% non-condensing

• Supports standard DeviceNet baud rates of 125, 250 and 500 baud

• UCMM capable and supports Group 1, 2, and 3 dynamic connections.

• Accepts shielded twisted pair cable compatible with target network

Quick Start

1. Check DIP switch settings on the card against the default settings (see “Default Settings"). You should use default settings except in only unusual situations. Your Smart Trac Field Engineer can help you if you need assistance.

2. Power OFF your Smart Trac AC1.

3. Install the card in your Smart Trac AC1 in a PC/104 option card position (on top of the Smart Trac Ethernet Card or another PC/104 option card).

4. Connect the DeviceNet network cable.

5. If your power supply is not on a common circuit breaker with the Smart Trac AC1, power up your DeviceNet network.

6. Power up your Smart Trac AC1.

7. Test your card installation.

4 •• Smart Trac DeviceNet Card Technical Manual 3554-0070

DeviceNet Basics

Introduction

Originally developed by Bosch for the automotive industry, DeviceNet is a lowcost communications protocol to connect industrial devices (i.e., limit switches, sensors, bar code readers, variable frequency drives, panel displays and operator interfaces) to a network. DeviceNet provides an open network standard with high noise immunity, suitable to industrial environments. The protocol includes device-level diagnostics. It allows the addition of other devices on a network without cycling power to the network.

SMART TRAC DeviceNet Card

Configuration Tool

+24 Volt

power supply

Controller

Network

DeviceNet

Other Devices

Motor

Starter

Barcode

Pushbutton

Cluster

Input/Output

Devices

Figure 1. Typical DeviceNet Network configuration

The Open Systems Interconnect (OSI), established in 1984 by the ISO (International Standards Organization), divides network functions into seven layers: Physical, Data Link, Network, Transport, Session, Presentation and Application Protocol. DeviceNet provides the Application Protocol (highest level 7), Data Link Layer (layer 2), Physical Layer (layer 1) and Transmission Media (a sublevel of level 1, sometimes referred to as an eighth layer 0).

Smart Trac

AC1

Scanner

DeviceNet incorporates the CAN protocol to provide the Data Link Layer.

Technical Manual 3554-0070 DeviceNet Basics •• 5

SMART TRAC DeviceNet Card

Application

Presentation

Session

Transport

Network

Data Link

Physical

Figure 2. DeviceNet and the OSI Model

• The Physical Layer transforms data into bits that are sent across the physical media.

• The Data Link layer determines access to the network media in terms of frames. Its Media Access Control (MAC) sublayer is responsible for physical addressing.

• The Network Layer routes data through a large network.

• The Transport Layer provides end-to-end, reliable connections, often in

terms of segments.

DeviceNet provides these layers of the OSI (Open Systems Interconnect) model.

DeviceNet Network Topology

• The Session Layer allows users to establish connections using intelligently chosen names in packets.

• The Presentation Layer negotiates data exchange formats, also in terms of packets.

• Finally, the Application Layer provides the interface between the user's application and the network through messages.

Data is said to move from layer to layer within the seven layers of the OSI model. CAN (Controller Area Network)-based, DeviceNet permits networking of up to 64 nodes, called Media Access Control Identifiers, or MAC-IDs. CAN defines the syntax or form of the data movement. By adhering to the CAN specification and using CAN Controller chips, DeviceNet completely defines the Data Link layer of the OSI model.

Devices on DeviceNet networks are physically connected together in a linear bus topology. All devices on the network are connected to one primary trunk cable. You must install terminating resistors at the end of the trunk line. You may install drop lines with lengths of up to 6 meters (20 feet) to attach one or more nodes. The maximum number of drop lines and their lengths are subject to maximum drop cable distances (see Table 1). DeviceNet allows for branching structures only on the drop line. See "Figure 3 " for a typical DeviceNet topology. In the figure, the thick line represents the trunk line of the network. Thin lines represent drop lines.

6 •• DeviceNet Basics Technical Manual 3554-0070

SMART TRAC DeviceNet Card

Multiple Node

Node

Branching Drop Line

Multi-Port

Tap

Node

Tap

Node

Terminating Resistor

Node

Zero Length Drop Line

Network Length

Line Length with Thin or Thick Cable

Node

Tap

Node

Multi-Port

Tap

Node

Multiple Node Daisy Chain Drop Line

Figure 3. Typical DeviceNet Topology.

In a DeviceNet network, end-to-end network (and point-to-point) distance varies with network transmission speed (baud rate). You may use a combination of thick and thin cable to construct trunk lines.

For trunk lines constructed of only one type of cable (either thick OR thin), refer to Table 1. Remember that "network length" includes the combined length of trunk line cable and drop line cable between the points.

Table 1. DeviceNet Network Length

DeviceNet Network Length

Speed (Baud Rate)

125 Kbps 1, 640 ft. (500m) 328 ft (100m) 250 Kbps 820 ft (250 m)

500 Kbps 328 ft. (100m) 328 ft (100m)

Maximum Length Allowed (Thick Trunk Length)

Maximum Length Allowed (Thin Trunk Length)

328 ft (100m)

Maximum Drop Length 20 ft (6m) (Drop line length is the longest cable distance measured from the tap on the trunk line to each of the transceivers of the nodes on the drop line).

Cumulative Drop Length 512 ft (156 m) at 125 Kpbs; 256 ft (78m) at 250 Kbps; or 128 ft (39m) at 500 Kbps

Data Packets: 0-8 bytes Bus Topology: Linear (trunkline/dropline) with power and signal on the

same network cable. Bus Addressing: Peer-to-Peer with Multi-Cast (one-to-many) or Multi-

Master and Master/Slave special case; polled or change-of-state (exception-based)

Technical Manual 3554-0070 DeviceNet Basics •• 7

SMART TRAC DeviceNet Card

System Features: Removal and replacement of devices from the

network under power.

Line Length with both Thick and Thin Cables

When using a combination of thin and thick cable in a DeviceNet network, calculate the maximum cable distance according to Figure 4 and the following formulae:

At 125 Kbps: L At 250 Kbps: L At 500 Kbps: L (L

is length of thick cable and L

thick

+ 5.0 * L

thick

+ 2.5 * L

thick

+ L

thick

= 500

thin

= 250

thin

= 100

thin

is length of thin cable)

thin

100

Length of Thin Cable (meters)

60 40 20

125

500

Kbps

Length of Thick Cable (meters)

250 Kbps

200100 300 400 5000

Kbps

Figure 4. Combined Thin and Thick Cable Length Determination

Thick Cable Specifications

Thin Cable Specifications

Thick cable consists of two shielded pairs twisted on a common axis with a drain wire in the center. An overall braid shield covers the shield pairs. Thick cable is typically used for trunk lines.

The thick cable specified for DeviceNet network connections consists of:

• One (1) twisted signal pair (#18): blue/white

• One (1) twisted power pair (#15): black/red

• Separate aluminized Mylar shields around power pair and signal pair

• Overall foil/braid shield with drain wire (#18): bare

Thinner and more flexible than than Thick Cable, use Thin Cable for drop lines or for shorter distance trunk lines.

The thin cable specified for DeviceNet network connections consists of:

• One twisted signal pair (#24): blue/white

• One twisted power pair (#22): black/red

• Separate aluminized Mylar shields around power pair and signal pair

• Overall foil/braid shield with drain wire (#22): bare

8 •• DeviceNet Basics Technical Manual 3554-0070

Terminating Resistor Specifications

SMART TRAC DeviceNet Card

You must install a terminating resistor at the farthest ends of a trunk line (and only two per network). These terminating resistors must be 121 ohm, 1% Metal Film, 1/4 Watt resistors.

NOTE: DO NOT install terminating resistors at the end of drop lines.

DeviceNet Connector

Your Smart Trac DeviceNet card ships with one female DeviceNet connector. It mates with a male connector mounted on the card. The pinout of DeviceNet connectors is described in Table 2.

Technical Manual 3554-0070 DeviceNet Basics •• 9

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