GE VME DLAN User manual

ÎÎ
Programmable Control Products
VME DLAN/DLAN+
Interface Module
User’s Manual
GFK-1044A March 2010
GE
Intelligent Platforms

GFL-002
Warnings, Cautions, and Notes
as Used in this Publication
Warning
Warning notices are used in this publication to emphasize that hazardous voltages,
currents, temperatures, or other conditions that could cause personal injury exist in this
equipment or may be associated with its use.
In situations where inattention could cause either personal injury or damage to equipment,
a Warning notice is used.
Caution
Caution notices are used where equipment might be damaged if care is not taken.
Note: Notes merely call attention to information that is especially significant to
understanding and operating the equipment.
This document is based on information available at the time of its publication. While efforts
have been made to be accurate, the information contained herein does not purport to cover all
details or variations in hardware or software, nor to provide for every possible contingency in
connection with installation, operation, or maintenance. Features may be described herein
which are not present in all hardware and software systems. GE Intelligent Platforms assumes
no obligation of notice to holders of this document with respect to changes subsequently made.
GE Intelligent Platforms makes no representation or warranty, expressed, implied, or statutory
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usefulness of the information contained herein. No warranties of merchantability or fitness for
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* indicates a trademark of GE Intelligent Platforms, Inc. and/or its affiliates. All other
trademarks are the property of their respective owners.
©Copyright 2010 GE Intelligent Platforms, Inc.
All Rights Reserved

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Additional information 3Hhttp://www.ge-ip.com/
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If you have technical problems that cannot be resolved with the information in this guide, please
contact us by telephone or email, or on the web at 5Hwww.ge-ip.com/support
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v
GFK-1044A
Preface
The VME DLAN/DLAN+ Interface Module, from GE Intelligent Platforms North America, Inc.,
is a high-performance interface between the GE Drive Systems DLAN and DLAN+ local area
network (LAN) protocols and VMEbus based computer systems.
Revisions to This Manual
This version (GFK-1044A) of the VME DLAN/DLAN+ Interface Module User’s Manual has
changes to two chapters. In Chapter 1, Figure 1-1 has been revised to show the DLAN
configuration jumpers. Section 2 of Chapter 2 now describes DLAN jumper configuration.
Previously numbered Section 2 is now Section 3..
Content of this Manual
This manual contains the following chapters:
Chapter 1. Introduction: describes the features of the VME DLAN Interface module. The
basic operation of DLAN applications is also introduced in this chapter.
Chapter 2. Installation and Initialization: explains how to install and configure the VME
DLAN Interface module in a VME computer system.
Appendix A. Example C Program to Initialize a VME DLAN Interface Module: shows you
how to write application code to initialize the DLAN module.
Related DLAN Interface Module Publications
For more information, refer to these publications:
Important Product Information for VME DLAN/DLAN+ Interface Module (GFK-1049).
Data Sheet for DLAN/VME DLAN Interface Module (GFK-0728)

Preface
vi VME DLAN/DLAN+ Interface Module User’s Manual - August 1995 GFK-1044A
We Welcome Your Comments and Suggestions
At GE Intelligent Platforms, we strive to produce quality technical documentation. After you
have used this manual, please take a few moments to complete and return the Reader’s
Comment Card located on the next page.
Henry A. Konat
Senior Technical Writer

Contents
Table of Contents viiviii
GFK-1044A
Chapter 1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 1: System Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DLAN Basics 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VME DLAN Interface Module Functions 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
VME DLAN Applications 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 2: DLAN Interface Module Description 1-3. . . . . . . . . . . . . . . .
LED Indicators 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Address Select Jumpers 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restart Pushbutton 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DLAN Network Connector 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DLAN Configuration Jumpers 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Connectors 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2 Installation and Initialization 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What You Will Need 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 1: Installing the DLAN Interface module Hardware 2-2. . . . . .
Overview 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Address Select Jumpers 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a VME DLAN Interface Module 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 2: DLAN Jumper Configuration 2-5. . . . . . . . . . . . . . . . . . . . . . .
DLAN Configuration Jumpers 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting the DLAN Network Type 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting RS-485 Termination Resistors 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 3: Initializing the VMEbus Interface 2-8. . . . . . . . . . . . . . . . . .
Required Initialization Data 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Initialization Process 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Addressing the Target VME DLAN Module 2-9. . . . . . . . . . . . . . . . . . . . . . . . . .
Writing Initialization Data 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading the DLAN Module’s Acknowledgment 2-9. . . . . . . . . . . . . . . . . . . . . . .
Status Data Available from a DLAN Module 2-10. . . . . . . . . . . . . . . . . . . . . . . . .
Module ID String 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Up Diagnostics Result 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A Example C Program to Initialize a VME DLAN Interface Module A-1. .

Contents
vi GFK-1044A
VME DLAN/DLAN+ Interface Module User’s Manual - August 1995

1
1-2 VME DLAN/DLAN+ Interface Module User’s Manual - August 1995 GFK-1044A
VME DLAN Interface Module Functions
The VME DLAN Interface module can operate as either a DLAN or DLAN+ controller.
However, a single module can not be both a DLAN and DLAN+ controller at the same time. If
the application requires both DLAN and DLAN+ devices, two DLAN Interface modules must
be used.
The module passes page data and commands between network devices and a CPU application
program. The knowledge about what the network devices are intended to do is contained in the
CPU program.
VME DLAN Applications
Hardware Requirements
The minimum hardware configuration for a VME DLAN or DLAN+ application requires these
components:
1. A VME-based computer system that includes (at least) a rack, power supply, and CPU
module to run the application program.
2. One or more VME DLAN Interface modules installed in another slot or slots.
3. A DLAN or DLAN+ network connected to each DLAN Interface module.
4. One or more GE Drive Systems devices connected to each network.
Typically, additional VME modules will also be required to monitor and control the application.
However, the discussion in this manual is limited to the DLAN Interface module and the
associated CPU program.

1
1-3
GFK-1044A Chapter 1 Introduction
Section 2: DLAN Interface Module Description
This section describes hardware items of interest to the user that are on the DLAN Interface
module. These items are: three LED status indicators, a restart pushbutton, a DLAN interface
connector, and address select jumpers.
LED Indicators
The three LED indicators, shown in the following figures, are mounted along the top front edge
of the DLAN Interface module.
a47040
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Î
Î
Î
Î
Î
Î
Î
Î
Î
Î
JP1
JP2
JP3
JP4
HL
ADDRESS
SELECT
JUMPERS
DLAN
CONNECTOR
DATA IN
BEM 764
Î
Î
MODULE OK
Î
COMMAND OUT
Î
DATA IN
ON = OK, ACTIVE
MODULE:
IC697BEM764
LABEL:
44A726758-141R01
MODULE FUNCTION
GE DRIVES
DLAN INTERFACE
PUSH TO RESTART
COMMUNICATION.
DOOR
MODULE OK
COMMAND OUT
DLAN
NETWORK
CONNECTOR
RESTART
OTHER LEDS FOR
FACTORY USE.
(D CONNECTORS
NOT USED)
1
2
3
4
5
6
7
8
TXA-
TXA+
TXB-
TXB+
5V
0V
TX
RX
DLAN
CONFIGURATION
JUMPERS
Figure 1-1. VME DLAN/DLAN+ Interface Module

1
1-4 VME DLAN/DLAN+ Interface Module User’s Manual - August 1995 GFK-1044A
MODULE OK LED
The MODULE OK LED indicates the current status of the DLAN Interface module. It has
three states:
Table 1-1. MODULE OK LED Status
State Description
Off When the MODULE OK LED is off, the DLAN Interface module is not functioning. This is
the result of a hardware malfunction; for example, the diagnostic checks
detected a failure. Corrective action is required in order to get the module
functioning again.
On When the LED is on steadily, the DLAN Interface module is functioning properly. Normally,
this LED should always be on, indicating that both the diagnostic tests
and the initialization by the VME CPU were successfully completed.
Flashing The LED flashes rapidly during power-up diagnostics and then more slowly while it waits for
initialization by the CPU.
Note
The DLAN Interface module has a hardware watchdog timer that is periodically
reset by the module software. If the watchdog timer expires, the module stops
functioning and the MODULE OK LED turns off.
COMMAND OUT LED
The center LED indicator, referred to as COMMAND OUT on the module door label, has two
functions. It flashes on briefly during the self test that occurs when the VME rack is powered
on or the module Restart pushbutton is pressed. During normal operation, it flashes whenever a
command from the CPU application program is sent to a network drop.
DATA IN LED
The lower LED indicator, referred to as DATA IN on the module door label, flashes whenever a
page data update message is received from one of the network drops. Most frequently, these
messages contain feedback data. If none of the drops broadcasts an update message, this LED
will flash every two seconds as long as any active drops are connected to the network.
Address Select Jumpers
The address select jumpers, JP1 through JP4, are used to select the VME base address that the
VME DLAN module will respond to in VME short non-privileged mode. See chapter 2, section
1 of this manual for details.
Restart Pushbutton
Pressing the Restart pushbutton for any length of time will halt DLAN communication and
cause the module to perform its internal tests. The CPU application program must detect this
condition and send new DLAN configuration data in order for communication to restart
automatically.

1
1-5
GFK-1044A Chapter 1 Introduction
DLAN Network Connector
This eight-pin connector provides a means of connecting the DLAN Interface module to the
DLAN or DLAN+ network. A connector on the cable from the DLAN network connection
block mates to the connector on the module.
DLAN Configuration Jumpers
These jumpers are used to configure the network connection when the Network Type is
specified as DLAN. JP2 through JP4 are used to select either the optically isolated LAN
network or an RS-485 LAN network. If the RS-485 LAN network is selected, JP5 and JP6 are
used to select whether the RS-485 network termination resistors are IN or OUT.
Battery
The DLAN Interface module does not use a battery.
Serial Connectors
The two DB-25S serial connectors on the DLAN Interface module are not used.

2section level 1 1
figure bi level 1
table_big level 1
2-1
GFK-1044A
Chapter 1Installation and Initialization
This chapter explains how to install a DLAN Interface module in a VME system and the
software initialization that must occur before the module can operate. There are several easy
steps in preparing the DLAN Interface module for use.
The chapter is divided into three sections. The necessary equipment and software packages
required for the installation process are described below. After that, each section describes one
step of the installation procedure in detail.
Step 1. Installing the DLAN Interface Module Hardware: Refer to Section 1 for a
description of the physical installation of the DLAN Interface module in a VME rack. A
description of the module hardware is also included.
Step 2. DLAN Jumper Configuration: Section 2 describes how to set the DLAN
configuration jumpers located on the DLAN daughter board when a DLAN network (rather than
DLAN+ network) is used.
Step 3. Software Initialization of the DLAN Interface Module Bus Interface: Section 3
describes the steps that must be performed by the VME CPU to initialize the VMEbus interface
hardware in the DLAN Interface module.
What You Will Need
Before you can begin the installation procedure, you must have the following equipment and
software:
HA VMEbus based computer system that includes (at least) a VME rack, power supply, and
CPU module.
HOne or more VME DLAN Interface modules.
HAn application development platform and tools for the VME CPU.

2
2-2 VME DLAN/DLAN+ Interface Module User’s Manual - August 1995 GFK-1044A
Section 1: Installing the DLAN Interface module Hardware
The first step in the installation procedure is to set the base address jumpers for VME short
non-privileged access mode. Then, the DLAN Interface module must be installed in a VME
rack.
Overview
Each VME DLAN Interface module must reside in the same rack as the VME CPU. The
following illustration shows one possible system configuration for installing a DLAN Interface
module in a VME rack.
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VME RACK CONFIGURATION
P
SC P
U
D
L
A
N
Figure 2-1. VME DLAN Interface Module Configuration
The VME CPU modules usually must reside in a specific slot in the rack. Depending on the
specific hardware, the power supply (PS in figure 2-1) may be external to the rack, built into the
rack, or installed in a specific slot.
DLAN Interface modules may be placed in any unused slot in the rack. However, there may be
restrictions on empty slots between the CPU and other VME modules that use hardware
interrupts. Refer to the manufacturer’s installation instructions for information on such
restrictions. The VME DLAN module does not use hardware interrupts.
Setting the Address Select Jumpers
Before a VME DLAN module is installed in a rack, its address in VME short non-privileged
address space (AM code 29 hexadecimal) must be selected by setting four jumpers. When you
hold the module as shown in Figure 1-1, with the component side toward you and the LED
indicators in the upper left corner, the four address select jumpers are near the lower right
corner. They are the only jumpers on the module.
Figure 2-2 shows an enlarged view of the address select jumpers. In the figure, jumpers JP1,
JP2, and JP4 are shown in the logic low (L) position; and JP3 is shown in the logic high (H)
position. When the module is shipped from the factory, all four jumpers are set to the logic low
(L) position.

2
2-3
GFK-1044A Chapter 2 Installation and Initialization
JP4
JP1
JP2
JP3
HL
a47042
Figure 2-2. Address Selection Jumpers
There are 16 possible ways to set the four jumpers, and each one provides a unique range of
short non-privileged addresses for the module. Table 2-1 shows the address range for each
setting.
Table 2-1. Jumper Settings for Short Non-Privileged Address Range
ÁÁÁ
Á
Á
Á
ÁÁÁ
JP4
ÁÁÁ
Á
Á
Á
ÁÁÁ
JP3
ÁÁÁ
Á
Á
Á
ÁÁÁ
JP2
ÁÁ
ÁÁ
ÁÁ
JP1
ÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
Short Non-Privileged
Address Range
(Hexadecimal)
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
L
ÁÁ
ÁÁ
L
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
0000 - 07FF
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
L
ÁÁ
ÁÁ
H
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
0800 - 0FFF
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
H
ÁÁ
ÁÁ
L
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1000 - 17FF
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
H
ÁÁ
ÁÁ
H
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
1800 - 1FFF
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
L
ÁÁ
ÁÁ
L
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
2000 - 27FF
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
L
ÁÁ
ÁÁ
H
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
2800 - 2FFF
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
H
ÁÁ
ÁÁ
L
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
3000 - 37FF
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
H
ÁÁ
ÁÁ
H
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
3800 - 3FFF
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
L
ÁÁ
ÁÁ
L
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
4000 - 47FF
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
L
ÁÁ
ÁÁ
H
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
4800 - 4FFF
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
H
ÁÁ
ÁÁ
L
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
5000 - 57FF
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
L
ÁÁÁ
ÁÁÁ
H
ÁÁ
ÁÁ
H
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
5800 - 5FFF
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
L
ÁÁ
ÁÁ
L
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
6000 - 67FF
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
L
ÁÁ
ÁÁ
H
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
6800 - 6FFF
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
H
ÁÁ
ÁÁ
L
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
7000 - 77FF
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
H
ÁÁÁ
ÁÁÁ
H
ÁÁ
ÁÁ
H
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
7800 - 7FFF

2
2-4 VME DLAN/DLAN+ Interface Module User’s Manual - August 1995 GFK-1044A
Installing a VME DLAN Interface Module
To install a VME DLAN Interface module, follow these steps:
1. Power off the VME system.
2. Locate the desired slot.
3. Remove the VME DLAN Interface module from the shipping carton, but leave it in its
anti-static plastic bag. Touch an exposed metal surface of the VME rack to discharge any
electrostatic charge you may have picked up. Then remove the DLAN Interface module
from the protective bag.
4. Set the address select jumpers on the VME DLAN module as described previously.
5. Slide the DLAN Interface module completely into the slot. The three LEDs are located at
the top of the module.
6. Press the module firmly against the front rails of the PLC rack, but do not use excessive
force. When the module is fully seated, you will hear and/or feel clicks from the latches on
the top and bottom of the module faceplate.
7. Mount the DLAN/DLAN+ network connection block to the VME rack where the DLAN
Interface module is installed. Connect the ground wire from the connection block securely
to one of the ground screws on the VME rack. Connect the cable from the connection
block to the DLAN Interface module by mating its connector with the DLAN NETWORK
CONNECTOR shown in Figure 1-1. Finally, connect the network cable or cables to the
connection block. If the DLAN Interface module is at one end of the network cable, the
appropriate network terminator must be connected at the connection block.
8. Power on the VME rack. The MODULE OK LED of the DLAN Interface module should
immediately begin to flash rapidly. When diagnostics tests have completed, the LED will
flash at a slower rate until setup data has been written to its VMEbus interface. Refer to
the next section for information on the required setup.

2
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GFK-1044A Chapter 2 Installation and Initialization
Section 2: DLAN Jumper Configuration
DLAN Configuration Jumpers
When a DLAN network (rather than DLAN+ network) is used, jumpers on the DLAN daughter
board must be used to configure the network connection. This section describes how to set the
jumpers. If you are using a DLAN+ network, skip this section.
Figure 2-3 is an enlarged view of the DLAN configuration jumpers shown in Figure 1-1.
Jumper JP6 is nearest the DLAN network connector. The positions of these jumpers configure
the DLAN module connections to a DLAN network.
JP6
JP5
JP4
JP3
JP2
a47078
Figure 2-3. Detail of DLAN Configuration Jumpers From Figure 1-1.
Figure 2-4 shows the two possible positions for jumpers JP2 through JP6. All of the jumpers
are installed in the 1-2 position at the factory.
If you need to change one or more jumper positions, use this procedure. Each jumper has a thin
tab that extends beyond the edge of the DLAN daughter board toward the front of the module.
Grip the tab with needle nose pliers and pull it forward until it is free. Then move the jumper
so that it will engage pins 2 and 3, and push it onto the pins. Repeat for each jumper that needs
to be changed.

2
2-6 VME DLAN/DLAN+ Interface Module User’s Manual - August 1995 GFK-1044A
Jumper shown in 1-2 position.
Pin 3
Pin 2
Pin 1
Jumper shown in 2-3 position.
Pin 3
Pin 2
Pin 1
a47079
Figure 2-4. Selecting a DLAN Configuration Jumper Position
Selecting the DLAN Network Type
In addition to DLAN+, two types of DLAN networks are supported by version 1.04 and later
versions of the DLAN Module: optically isolated and RS-485. The DLAN network type is
selected by setting jumpers JP2, JP3, and JP4, as shown in Table 2-1. At the factory, these
jumpers are set to select the optically isolated network.
Table 2-2. Jumper Positions For Selecting DLAN Network Type
Jumper Optically Isolated LAN RS-485 LAN
JP2
JP3
JP4
1 –2
1 – 2
1 – 2
2 – 3
2 – 3
2 – 3
Caution
If the DLAN modules is powered on while connected to an optically
isolated network and jumpers JP2, JP3, and JP4 are set to the 2–3
position, the external isolated power supply for the isolated network will
be damaged.

2
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GFK-1044A Chapter 2 Installation and Initialization
Selecting RS-485 Termination Resistors
If the RS-485 network is selected, the drop at each end of the network cable should have the
termination resistors IN. This is true for all drop types, both DLAN modules and drives.
Adding additional termination resistors will improve the signal to noise ratio of RS-485
networks, but more than five sets of termination resistors will overload the drivers.
Accordingly, no more than five drops on a network should have the termination resistors IN.
Table 2–2 shows the jumper settings for termination resistors. At the factory, these jumpers are
set for termination resistors IN.
Table 2-3. Jumper Positions For RS-485 Network Termination Resistors
Termination Resistors
Jumper IN OUT
JP5 1 –2 2 – 3
JP6 1 – 2 2 – 3
If the optically isolated network is selected, the termination resistors are not used, and the JP5
and JP6 jumper settings are ignored.

2
2-8 VME DLAN/DLAN+ Interface Module User’s Manual - August 1995 GFK-1044A
Section 3: Initializing the VMEbus Interface
Each VME DLAN module must be initialized by writing to its VMEbus memory from the VME
CPU or other VME module before the DLAN module can be used. This initialization must
occur each time a rack containing a DLAN module is powered on.
The DLAN module is not permitted to execute until after initialization has occurred. The mod-
ule will wait indefinitely for its initialization data. During this time, the Module OK LED (the
topmost LED) continues to flash on and off. After initialization, the LED remains on continu-
ously.
The initialization may be performed by any VME module that has short non-privileged write
access to VME dual-ported memory in the DLAN module. However, initialization is usually
performed by the VME CPU.
For example initialization code, see appendix A, Example C Program to Initialize a VME
DLAN Module.
Required Initialization Data
VME DLAN initialization data consists of 64 contiguous bytes. Most of these bytes contain zero.
Byte locations where non-zero data is required are shown in table 2-2. All bytes in the range 0
through 63, inclusive, that are not specified in table 2-2 must be set to zero.
Table 2-4. Required Setup Data
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
Zero-Based
Byte Offset
(Hexadecimal)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Description
ÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁ
Á
Á
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁ
Required Value
or Range
(Hexadecimal)
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
5
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Bits 16 through 23 of the target module’s start
address in VME 24-bit standard non-privileged address
space.
ÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁ
0 ... FF
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
9
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Standard non-privileged address modifier code.
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
39
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
28
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Flag indicating the CPU has identified the target module
as a VME DLAN module.
ÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁ
80
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
3F
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Flag indicating valid setup data is available.
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
FE
VME dual-ported memory in the VME DLAN module is 64K bytes wide. Its starting address
in VME standard non-privileged address space must be set at a 64K byte boundary. Conse-
quently, bits 0 through 15, inclusive, of the start address specified in the module’s initialization
data must be zero.
The DLAN module VME memory may be located on any 64K byte boundary in the 16
megabyte VME A24 address space. Accordingly, the value assigned to start address bits 16 -
23, in byte offset five of the setup data, may be any value in the range 0 through 0FF
hexadecimal (0 through 255 decimal).