Yaskawa Microtrac LAN ARCNET Active hub User Manual

Download

ARCNET Active Hub

Part No. 05P00090-0279

For use on MicroTrac Local Area Network

Revision History

The following table shows pages that have been revised since the first release of this document.

Date Affected Pages

4/23/97 First release; supersedes RD 90-297 dated 11/27/95

All rights reserved. No part of this publication may be reproduced or used in any form by any means – graphic, electronic, or mechanical, including photocopying, recording, taping, or information storage and retrieval systems – without written permission of the publisher.

M i c r o Trac, DSD, PAC and MagneTek are trademarks of MagneTek, Inc.

Table of Contents

4/23/97

Table of

C o n t e n t s

P a g e

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i i

I N T R O D U C T I O N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

I N S TA L L AT I O N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

L A N C A B L I N G R U L E SA N D G U I D E L I N E S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

MASTER - SLAVE CONFIGURAT I O N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

O P E R AT I O N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Warranty

Standard products manufactured by the Company are warranted to be free from defects in workmanship and material for a period of one year from date of shipment and any products which are defective in workmanship or material will be repaired or replaced, at the Company's option, at no charge to the Buyer. Final determination as to whether a product is actually defective rests with the C o m p a n y. The obligation of the Company hereunder shall be limited solely to repair or replace, at the Company's discretion, products that fall within the foregoing limitations, and shall be conditioned upon receipt by the Company or written notice of any alleged defects or deficiency promptly after discovery and within the warranty period, and in the case of components or units purchased by the Company, the obligations of the Company shall not exceed the settlement that the Company is able to obtain from the supplier thereof. No products shall be returned to the Company without its prior consent. Products which the Company consents to have returned shall be shipped prepaid f.o.b. the Company's factory. The Company cannot assume responsibility or accept invoices for unauthorized repairs to its components, even though defective. The life of the products of the Company depends, to a large extent, upon the usage thereof, and THE COMPANY MAKES NO WARRANTY AS TO FITNESS OF ITS PRODUCTS FOR THE SPECIFIC APPLICATIONS BY THE BUYER NOR AS TO PERIOD OF SERVICE UNLESS THE COMPA N Y S P E C I F I C A L LY AGREES OTHERWISE IN WRITING AFTER THE PROPOSED USAGE HAS BEEN MADE KNOWN TO IT.

This warranty does not apply to experimental or developmental products for which NO warranty is made or given and Buyer waives any claim thereto.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PA RTICULAR PURPOSE AND BUYER HEREBY WAIVES ANY AND ALL CLAIMS THEREFORE.

IN NO EVENT SHALL THE COMPANY BE LIABLE FOR LOSS OF P R O F I T, INDIRECT, CONSEQUENTIAL OR INCIDENTAL DAMAGES WHETHER ARISING OUT OF WA R R A N T Y, BREACH OF CONTRACT OR TO RT.

4/23/97

INTRODUCTION

4/23/97

I N T R O D U C T I O N

The ARCNET Active Hub is an electronic bi-directional repeater designed to expand the number of ARCNET nodes that can be used on a single network. A network node is any attached device that can participate in the token-passing process. Nodes can be drives, PLC gateways, remote display controllers, remote logic nodes, remote computers, etc.

The ARCNET Hub receives messages sent by any one transmitting node, and relays the message to all other nodes on the network. The ARCNET Hub has four ports. Each port can accommodate a cable segment containing up to eight (8) nodes. The ARCNET Hub also has LED indicators on the Hub card showing which port LAN segments are actively receiving. The ARCNET Hub card can be used in a separate power supply/card cage as a stand alone unit, or installed into a PLC gateway.

INTRODUCTION

4/23/97

INSTALLATION

4/23/97

WA R N I N G

It is extremely important that when you work with the ARCNET Active Hub you avoid static electricity. Static electricity will cause s e v e re damage to the system’s electrical components. Always gr o u n d yourself by wearing a wrist or ankle strap. When not in use, keep the ARCNET Active Hub in its anti-static bag.

1 . Remove the cover of the MicroTrac DSD PLC Gateway. 2 . Remove the Hub Card from its protective anti-static bag. See Wa r n i n g . 3 . Before proceeding, verify all jumper positions shown in Figure 1. 4 . Install the Hub Card in an empty slot of the PLC Gateway. 5 . Secure the Hub Card with a 6-32 metal screw and a star washer. 6 . Important Note: Read “LAN Cabling Rules and Guidelines”.

The ARCNET Hub stand alone unit comes ready to be mounted on a panel. It is recommended that the stand alone unit be firmly grounded through the chassis, as well as the power cord. This can be accomplished by first scraping away paint on the panel around at least one of the chassis mounting holes. Next mount the assembly using star washers on the mounting bolts. It is also recommended that the ARCNET Hub be installed away from high power equipment with devices of similar function (PLC gateways, metering equipment). This is to prevent noise interference.

Important Note: Verify the jumper positions (see Figure 1), and read “LAN

Cabling Rules and Guidelines” before installation or operation.

I N S TA L L AT I O N

Installation Into

a PLC Gateway

Stand Alone

U n i t

LAN CABLING RULES AND GUIDELINES

L A N C A B L I N G

R U L E S A N D

G U I D E L I N E S

The ARCNET LAN uses RG-62A/U coaxial cable, BELDEN number 9269 or equivalent (MagneTek Part No. 05P00211-0047). Other cable types will not work properly.

The LAN cable should be routed with signal level wires only. The LAN cable

may cross power wiring, but only at a 90 degree angle. A LAN cable that runs parallel to power wiring may pick up noise from that power wiring even if separated by a space of several inches. It is best to separate signal level wiring (including the LAN cable) from power wiring (including relay coil wiring) with a metal divider in a cable tray or by routing the signal wire through its own metal conduit.

LAN nodes may be connected in any order. Minimum cable length between nodes is 6 feet, and the minimum bend radius of the cable is 2.5 inches. The maximum distance from one end of the LAN to the other without the Active Hub is 900 feet. The ARCNET Active Hub can support a maximum of 900 feet

on each of its 4 ports. A maximum of eight (8) nodes can be connected to each

Active Hub port.

Each LAN node is directly connected to the coaxial cable with a TEE connector ( M a g n e Tek Part No. 05P00034-0540). Both ends of the coaxial cable must be terminated with a 93 ohm termination (MagneTek Part No. 05P00034-0586). The ARCNET Active Hub provides its own active termination as long as power

is applied to it. No TEE connector should be used on the Hub ports. The

ARCNET Active Hub must be connected at the end of the coaxial cable. Leave

unused ports open; it is not necessary to terminate them with 93 ohm t e r m i n a t o r s .

If a node is disconnected at a TEE connector, either replace the TEE connector using a BNC-BNC splice or (if temporary for diagnostic purposes) leave it open.

Do not add another 93 ohm terminator, as it may overload the signal and destroy

c o m m u n i c a t i o n s .

The outer conductor of the LAN cable must not touch ground. This means that cable TEE connectors and terminating resistors should not touch a drive chassis

or any other grounded surface. If cable splice connectors are used for wiring

convenience, they must be insulated from metallic conduit or pull boxes.

LAN CABLING RULES AND GUIDELINES

4/23/97

HUB CARD

Port

LAN CABLING RULES AND GUIDELINES

ARCNET LAN SEGMENT

(See Note below for LAN cable length)

DRIVE

PLC

DRIVE

DISPLAY

Length between nodes (See Note below)

DRIVE

Computer

DRIVE

Node

DRIVE

Terminators (93 Ω)

Note: LAN cable length can be up to 900 feet for each of the Hub ports. The minimum cable length between nodes is 6 feet.

Figure 2. M i c r o Trac DSD LAN Cabling

LAN CABLING RULES AND GUIDELINES

MASTER - SLAVECONFIGURATION

MASTER - SLAVE CONFIGURATION

MASTER -

SLAVE

CONFIGURA-

TION

(When more

than 4 ports are

needed)

In some instances more than 4 ports are needed. When this occurs, two or more ARCNET Active Hubs are required. The setup for this configuration is as follows:

1 . Position jumpers of E4 in one of the Active Hubs as shown:

This will be the m a s t e r Active Hub.

2 . Position jumpers of E4 in the other Active Hubs as shown:

These will be the s l a v e Active Hubs.

3 . Position jumpers of E8 in both master and slaves as shown:

CON

BUS

These jumpers MUST be in this position in order to direct control signals to J1. This connector distributes the timing and signals between the Hub c a r d s .

4/23/97

MASTER-SLAVECONFIGURATION

4/23/97

4 . A 10 pin ribbon cable connector is used in J1 to daisy chain the master

and slave Active Hubs.

Figure 3. Ribbon and Connectors for Master-Slave Configuration

10 pin connector (MagneTek Part No. 05P00034-0321)

Pin 1

2 inches

10 pin ribbon cable (MagneTek Part No. M35102280010)

OPERATION

The Operation of the ARCNET Active Hub can be monitored through the LED activity indicators. Figure 4 shows the LED corresponding to each port.

Figure 4. LED Indicators

When a Receive Activity LED indicator is lit solid, there is LAN activity on that port. If a LED is blinking, there is an idle condition on that port, and all nodes on that port are not receiving. In most cases when this happens, the yellow Recon (Reconfiguration) LED indicator will also be ‘ON’. When the proper passing of the token is disrupted, the network must be reconfigured. During reconfiguration, the ARCNET LAN identifies all the active nodes on the network. (See “What To Do When the Recon Indicator Lights Up”.)

The Recon (yellow) LED indicator shows the stability of the network. This light is ‘OFF’ when the system is operating properly. The Recon indicator will light up when the system is first powered up, when a node is removed, or when a node is added to the system. Under these conditions, the yellow Recon LED should remain ‘ON’ for no more than 1 second.

If the RECON indicator lights up for other than the above mentioned conditions, the network is not under stable operating conditions. Action must be taken to determine and correct the cause of repetitive Recons, as they will interfere with normal LAN communications. (See “What To Do When the Recon Indicator Lights Up”.)

4/23/97

OPERATION

What To Do When the Recon Indicator Lights Up

4/23/97

The following flowchart and corrective actions provide a systematic approach of isolating the node(s) that generate RECONs. If after following these steps no nodes have been isolated and RECONs continue, contact a MagneT e k r e p r e s e n t a t i v e .

What To Do

When the

Recon Indicator

Lights Up

Are

Power

Supply LEDs

‘ON’ and steady

(located on backplane)

Recon

LED ‘ON’

Are

there

any RED

Receive Activity

Indicator LEDs

(CR1 - CR4)

‘ON’

If blinking:

Ensure that the proper loading resistor assemblies are installed in the backplane of the chassis assembly.

For Hub Assemblies:

MagneTek P/N 05P00090-0397 (10 ohm, 5W) should be installed into J1, and MagneTek P/N 05P00090-0398 (56 ohm, 5W) should be installed into J2.

For PLC gateway assemblies:

MagneTek P/N 05P00090-0398 (56 ohm, 5W) should be installed into J2.

If ‘OFF’:

Verify that 110 Vac power is applied to power supply (i.e. is switch ON, is incoming power hot, etc.). Verify fuses. The unit includes two (2) fuses. One fuse is located on the power supply board. If needed,

replace this fuse with a 5MF2A250V or equivalent. The other fuse is located in the Input Power connector assembly, between Power Switch and IEC plug. A spare fuse is located above the fuse holder. If needed, replace this fuse with a T2AL250V or equivalent.

If ‘OFF’ and 110 Vac is present and fuses are not burnt:

The power supply is bad; so the chassis assembly must be replaced.

For Hub assemblies:

MagneTek P/N 05P00090-0268 (PC chassis, 4 half slots, 65W P.S.).

For PLC gateway assemblies:

MagneTek P/N 05P00090-0273 (PC chassis, 3 half / 3 full slots,

65W P.S.).

Yes

there

more than

1 MicroTrac

LAN node

powered

Yes

This is good. There are no Recons on the Network.

The ARCNET Active Hub will indicate a RECON when there are no LAN segments connected to the Hub, or when 1 LAN segment with only 1 node is powered up. These are valid conditions.

There must be at least 2 nodes powered up for token passing to occur. If only 1 node is powered up, there is no node to pass the token to, so a RECON will occur.

OPERATION

What To Do When the Recon Indicator Lights Up

Disconnect all LAN

segments from Hub.

From first LAN seg-

ment to #X LAN

segment used:

Connect LAN

segment to Hub.

Does

Recon

LED stay

‘ON’

Yes

(Go to next LAN

segment)

Disconnect that

LAN segment.

this the last

LAN segment

Yes

Proceed as

indicated below.

At this point, one or more trouble LAN segments have been isolated. These LAN segments generated RECONs. The nodes on these LAN segments should be looked at next, in order to isolate the trouble making node.

4/23/97

OPERATION

What To Do When the Recon Indicator Lights Up

4/23/97

Proceed as follows for each LAN segment:

1. Disconnect all nodes from that LAN segment, including the Hub connection, by removing the TEE from all nodes, taking care that they do not touch anything.

2. With an ohmmeter, check cable resistance at the cable end that plugs into the Hub. This resistance should be 93 ohms from the center pin at the BNC to the shield. If resistance is greater than 93 ohms, there is an open or missing terminator on the LAN segment, or a bad cable. If resistance is between 0 ohms and 93 ohms, the segment has a wrong type of terminator or a shorted cable.

3. Plug the LAN cable into any port on the Hub. The Hub should show no activity on that port, and no RECONs. If the Hub shows activity or RECONs, not all the nodes have been disconnected from the LAN segment.

4. Add 1 node at a time to the LAN segment, watching the RECON indicator LED. If it stays ‘ON’, disconnect that node and move to the next node. Note that it is normal for the RECON LED to turn on initially when a node is added; however, it should soon turn off and stay off.

5. At this point, you should have a stable network with no RECONs. The node(s) that were disconnected could have the following problems, depending on whether the system is new, or if it has been operating for some time with no problems:

New System

• Duplicate Node numbers on Network; none are allowed.

Action: Check PAC Diagram LAN I.D. numbers.

Check Remote LAN node hardware Node I.D.

switch settings.

• Hardware failure

Action: Check power supplies.

Make sure system has a good grounding

scheme. Contact MagneTek for Grounding Practices publication.

Swap suspected bad hardware PCB with a

known good hardware PCB.

Make sure ARCNET coaxial TEE connector

touches no metal objects other than the BNC connectors.

Make sure ARCNET coaxial termination resistor

touches no metal objects other than the TEE connector.

OPERATION

What To Do When the Recon Indicator Lights Up

System That Has Been Operating For Some Time With No Problems

• Hardware failure

Action: Check power supplies.

Make sure system has a good grounding

scheme. Contact MagneTek for Grounding Practices publication.

Swap suspected bad hardware PCB with a

known good hardware PCB.

Make sure ARCNET coaxial TEE connectors

are not touching other metal objects.

Make sure ARCNET coaxial termination resistor

touches no metal objects other than the TEE connector.

4/23/97

Yaskawa Microtrac LAN ARCNET Active hub User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual