Allen-Bradley Data Highway II PLC-2 User manual

User Manual
Data Highway II
PLC-2 Family
Interface
(Cat. No. 1779-KP2,
KP2R)
AllenBradley

Using This Manual 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Objectives 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual's Purpose 11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audience 11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vocabulary 11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Organization 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introducing the PLC2/DHII Interface 21. . . . . . . . . . . . . . . . .
Chapter Objectives 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What
Is the PLC2/DHII Interface? 21. . . . . . . . . . . . . . . . . . . . . . . .
What
Is Its Function? 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compatible Processors 24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication Connections 24
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Node Interfaces 25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Highway II Network 25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Media Access Method 29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bridges to Other Data Highway II Links 210
. . . . . . . . . . . . . . . . . . . .
Command/Reply 210
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Message Priority 214
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Redundant
Cabling 217. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Second Link 218
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 218
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Data Highway II Link Cabling Hardware 31. . . . . . .
Chapter Objectives 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identifying Hardware 31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Planning
Cabling Configuration 34. . . . . . . . . . . . . . . . . . . . . . . . . .
Taps and Length of Trunkline 34
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Taps 310
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Trunkline 311
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plugging
into the T ap 314. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Droplines 315
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 316
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents

Table of Contentsii
Installing the PLC2/DHII Interface 41. . . . . . . . . . . . . . . . . . .
Chapter Objectives 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Planning the Layout 41
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting
the PLC2/DHII Interface 44. . . . . . . . . . . . . . . . . . . . . . .
Setting Link Address 45
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting HostBoard Switches 45
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting MACBoard Switches 48
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting
Communication Cables 49. . . . . . . . . . . . . . . . . . . . . . .
Connecting Power and Ground 415
. . . . . . . . . . . . . . . . . . . . . . . . . .
Power
Distribution 417. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 418
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming the Local Host 51. . . . . . . . . . . . . . . . . . . . . . .
Chapter Objectives 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication Zone 51
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Status Words 516
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initiating and Monitoring Commands 523
. . . . . . . . . . . . . . . . . . . . . .
Memory Access Limitations 540
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 542
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation and Troubleshooting 61. . . . . . . . . . . . . . . . . . . . .
Chapter Objectives 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicators 61
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Switches 64
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the KP2 Interface 65
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Boards 66
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting the Interface 611
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Codes 614
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 614
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications A1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Codes B1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Objectives B1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Codes B1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1
11
Using This Manual
This chapter tells you about this manual. It explains this manual’s
purpose, audience, and content.
In this manual you will read about the PLC-2/DHII Interface
(Cat. No. 1779-KP2) and the Redundant PLC-2/DHII Interface
(Cat. No. 1779-KP2R). You will see how to install and use a PLC-2/DHII
interface in a Data Highway II communication network.
Plant electricians who install Data Highway II hardware need to read
Chapters 1 through 4 of this manual.
People who program programmable controllers need to read all but
Chapter 3. To use the PLC-2/DHII interface, you must be able to program
and operate a PLC-2 family programmable controller. In this manual, we
assume that you know how to do this. If you don’t, refer to the
appropriate manual for the controller you are using. Consult our
Publication Index (Publication 499) for a list of our publications.
The redundant PLC-2/DHII interface has all of the functions of the
PLC-2/DHII interface. Therefore, when we refer to the PLC-2/DHII
interface in this manual, it applies to both. We only mention the
redundant PLC-2/DHII interface in describing a difference.
When referring to an Allen-Bradley programmable controller in this
manual, we use the Allen-Bradley registered trademark PLC
programmable controllers.
Some node interfaces have the function of interfacing with an intelligent
foreign device, such as a computer. These foreign devices must have the
computer-like intelligence to communicate in the prescribed protocol.
Although some of these devices may not be thought of as computers, for
simplicity in this manual, we refer to them all as computers.
Chapter Objectives
Manual's Purpose
Audience
Vocabulary

Using This Manual
Chapter 1
12
This manual is organized into the following chapters:
Chapter Title What's Covered
1 Using This Manual Purpose, audience, vocabulary , and
organization for manual.
2 Introducing the PLC2/DHII Interface Overview of PLC2/DHII interface, its
function, application, and messages it
sends and receives.
3 Installing Data Highway II Link Cabling
Hardware
Installing taps, droplines, and
trunklines for Data Highway II link.
4 Installing PLC2/DHII Interface Installing PLC2/DHII interface and
connecting it to a PLC2 family
processor.
5 Programming Local Host Programming communication zone
rungs needed in PLC2 family
processor.
6 Operation and T roubleshooting Operating and troubleshooting your
KP2 interface.
This chapter told you about this manual. In the next chapter we introduce
the Data Highway II PLC-2 Family Interface (Cat. No. 1779-KP2,
-KP2R).
Manual Organization
Chapter Summary

Chapter 2
21
Introducing the PLC2/DHII Interface
This chapter gives you an overview of the 1779-KP2 interface, its
function, its application in a communication network, and the types of
messages it sends and receives.
The PLC-2/DHII interface is a standalone unit consisting of:
One Stationary Frame
One Removable Frame
One Power-Supply Board (Cat. No. 1779-PH2)
One PLC-2 Host Board (Cat. No. 1779-JP2)
One Media Access Controller Board (Cat. No. 1779-JMA)
A redundant PLC-2/DHII interface has a redundant media access
controller board (Cat. No. 1779-JMAR) instead of a Media Access
Controllerboard.
The stationary frame mounts on the back panel of an enclosure
(Figure 2.1). The removable frame fastens to the stationary frame.
The removable frame contains the power-supply board, the PLC-2 host
board, and the media access controller (MAC) board. A shield separates
the power-supply board from the PLC-2 host board and the MAC
(Figure 2.2).
Chapter Objectives
What Is the PLC2/DHII
Interface?

Introducing the PLC2/DHII Interface
Chapter 2
22
Figure 2.1
PLC2/DHII
Interface with Removable Frame Separated from Stationary Frame
Stationary Frame
Removable Frame

Introducing the PLC2/DHII Interface
Chapter 2
23
Figure 2.2
Rear
V iew of the Removable Frame Assembly
Shield
Power
Supply
Board MAC Board Host Board
12617
3M NO. 3394
3M NO. 3394
The PLC-2/DHII interface functions as a communication interface
between a PLC-2 family processor (host processor) and other nodes of a
Data Highway II link (Figure 2.3).
The power-supply board converts AC power to DC power that the PLC-2
host board and MAC board use. The power-supply board accepts either
120V AC OR 220V AC, 60 Hz. The PLC-2 host board communicates
with the PLC-2 family processor. The MAC board communicates with
the other nodes of the Data Highway II link through the coaxial cable
medium.
What Is Its Function?

Introducing the PLC2/DHII Interface
Chapter 2
24
The PLC-2/DHII interface is compatible with these PLC-2 family
processors:
Mini-PLC-2 Processor (Cat. No. 1772-LN1, -LN2, -LN3)
Mini-PLC-2/05 Processor (Cat. No. 1772-LS,-LSP)
Mini-PLC-2/15 Processor (Cat. No. 1772-LV)
PLC-2/20 Processor (Cat. No. 1772-LP1, -LP2)
PLC-2/30 Processor (Cat. No. 1772-LP3)
Figure 2.3
A
PLC2Family Processor Communicating with Other Nodes through a PLC2/DHII Interface
PLC2 Family
Processor
Other Nodes
of the
Data Highway II
Communication
Link
PowerSupply
Board
Media
Access
Board
PLC2
Host
Board
Host Processor
PLC2/DHII Interface
The PLC-2/DHII interface communicates through connectors on its front
surface (Figure 2.4).
The PROCESSOR connector provides cable connection to the PLC-2
family processor. At the PLC-2 family processor, the cable mates with
the connector provided for Industrial Terminal use.
The PROGRAM INTERFACE connector provides cable connection to an
Industrial Terminal for the PLC-2 family processor. When connected to
the PROGRAM INTERFACE connector, the Industrial Terminal behaves
as though it were connected directly to the PLC-2 family processor port.
The DATA HWY II jack provides dropline cable connection to a tap on a
Data Highway II link. A redundant PLC-2/DHII interface has a second
DATA HWY II jack for a redundant set of cabling for the link.
The DHII AUX ACCESS connector provides cable connection for future
communicationrequirements.
Compatible Processors
Communication Connections

Introducing the PLC2/DHII Interface
Chapter 2
25
You can use these node interfaces on a Data Highway II link:
Asynchronous Foreign-Device/DHII Interface (Cat. No. 1779-KFL)
Redundant Asynchronous Foreign-Device/DHII Interface
(Cat. No. 1779-KFLR)
Synchronous Foreign-Device/DHII Interface (Cat. No. 1779-KFM)
Redundant Synchronous Foreign-Device/DHII Interface
(Cat. No. 1779-KFMR)
PLC-2/DHII Interface (Cat. No. 1779-KP2)
Redundant PLC-2/DHII Interface (Cat. No. 1779-KP2R)
PLC-3/DHII Interface (Cat. No. 1779-KP3)
Redundant PLC-3/DHII Interface (Cat. No. 1779-KP3R)
Figure 2.4
Communication
Connections
Industrial
Terminal
PLC-2-Family
Tap
Processor
The Data Highway II network is a local area network (LAN) for the
industrial environment that provides peer-to-peer communication between
nodes. A Data Highway II network is illustrated in Figure 2.5.
Node Interfaces
Data Highway II Network