Bailey Infi 90 INPCI02 User manual

®
®
Process Control and
Automation Solutions
from Elsag Bailey Group
E96-621
Plant Loop to Computer Interface
(INPCI02)

WARNING notices as used in this instruction apply to hazards or unsafe practices that could result in
personal injury or death.
CAUTION notices apply to hazards or unsafe practices that could result in property damage.
NOTES highlight procedures and contain information that assists the operator in understanding the
information contained in this instruction.
WARNING
INSTRUCTION MANUALS
DO NOT INSTALL, MAINTAIN, OR OPERATE THIS EQUIPMENT WITHOUT READING, UNDERSTANDING,
AND FOLLOWING THE PROPER Elsag Bailey INSTRUCTIONS AND MANUALS; OTHERWISE, INJURY OR
DAMAGE MAY RESULT.
RADIO FREQUENCY INTERFERENCE
MOST ELECTRONIC EQUIPMENT IS INFLUENCED BY RADIO FREQUENCY INTERFERENCE (RFI). CAU-
TION SHOULD BE EXERCISED WITH REGARD TO THE USE OF PORTABLE COMMUNICATIONS EQUIP-
MENT IN THE AREA AROUND SUCH EQUIPMENT. PRUDENT PRACTICE DICTATES THAT SIGNS
SHOULD BE POSTED IN THE VICINITY OF THE EQUIPMENT CAUTIONING AGAINST THE USE OF POR-
TABLE COMMUNICATIONS EQUIPMENT.
POSSIBLE PROCESS UPSETS
MAINTENANCE MUST BE PERFORMED ONLY BY QUALIFIED PERSONNEL AND ONLY AFTER SECURING
EQUIPMENT CONTROLLED BY THIS PRODUCT. ADJUSTING OR REMOVING THIS PRODUCT WHILE IT IS
IN THE SYSTEM MAY UPSET THE PROCESS BEING CONTROLLED. SOME PROCESS UPSETS MAY
CAUSE INJURY OR DAMAGE.
AVERTISSEMENT
MANUELS D’OPÉRATION
NE PAS METTRE EN PLACE, RÉPARER OU FAIRE FONCTIONNER L’ÉQUIPEMENT SANS AVOIR LU,
COMPRIS ET SUIVI LES INSTRUCTIONS RÉGLEMENTAIRES DE Elsag Bailey. TOUTE NÉGLIGENCE À
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RIEL DE COMMUNICATION PORTATIF. LA PRUDENCE EXIGE QUE LES PRÉCAUTIONS À PRENDRE
DANS CE CAS SOIENT SIGNALÉES AUX ENDROITS VOULUS DANS VOTRE USINE.
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L’ENTRETIEN DOIT ÊTRE ASSURÉ PAR UNE PERSONNE QUALIFIÉE EN CONSIDÉRANT L’ASPECT
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TION DE CE PRODUIT PEUT OCCASIONNER DES À-COUPS AU PROCÉDÉ CONTRÔLE LORSQU’IL EST
INSÉRÉ DANS UNE SYSTÈME ACTIF. CES À-COUPS PEUVENT ÉGALEMENT OCCASIONNER DES
BLESSURES OU DES DOMMAGES MATÉREILS.
NOTICE
The information contained in this document is subject to change without notice.
Elsag Bailey, its affiliates, employees, and agents, and the authors and contributors to this publication specif-
ically disclaim all liabilities and warranties, express and implied (including warranties of merchantability and
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Selection of materials and/or equipment is at the sole risk of the user of this publication.
This document contains proprietary information of Elsag Bailey, Elsag Bailey Process Automation, and
is issued in strict confidence. Its use, or reproduction for use, for the reverse engineering, development
or manufacture of hardware or software described herein is prohibited. No part of this document may be
photocopied or reproduced without the prior written consent of Elsag Bailey.

I-E96-621A
Preface
Plant Loop to Plant Loop Computer Interface (INPCI02) enables
communication between a host computer and any node on the
INFI 90 Plant Loop. The interface consists of three modules,
the Plant Loop to Computer Transfer Module (INPCT01), the
Bus Transfer Module (INBTM01) and the Loop Interface Mod-
ule (INLIM03). The PCI is upwardly compatible to a Network 90
NCIU02/03 and can be used as a direct replacement.
This instruction explains PCI features, specifications, and
operation. It also includes installation and troubleshooting
procedures for the interface.
The system engineer or technician using the INPCI02 should
read and understand this instruction before installing the
interface modules. In addition, a complete understanding of
the INFI 90 system is beneficial to the user.

I-E96-621A
®
List of Effective Pages
Total number of pages in this instruction is 50, consisting of the following:
Page No. Change Date
Preface Original
List of Effective Pages Original
iii through vii Original
1-1 through 1-6 Original
2-1 through 2-2 Original
3-1 through 3-11 Original
4-1 through 4-11 Original
5-1 through 5-3 Original
6-1 Original
7-1 Original
8-1 Original
A-1 through A-2 Original
B-1 through B-2 Original
C-1 Original
D-1 through D-2 Original
When an update is received, insert the latest changed pages and dispose of the super-
seded pages.
NOTE: On an update page, the changed text or table is indicated by a vertical bar in the outer mar-
gin of the page adjacent to the changed area. A changed figure is indicated by a vertical bar in the
outer margin next to the figure caption. The date the update was prepared will appear beside the
page number.

vi I-E96-621A
Safety Summary
®
GENERAL
WARNINGS Equipment Environment
All components, whether in transportation, operation or storage
must be in a noncorrosive environment.
Electrical Shock Hazard During Maintenance
Disconnect power or take precautions to ensure that contact with
energized parts is avoided when servicing.
Special Handling
This module uses Electrostatic Sensitive Devices (ESD).
SPECIFIC
WARNINGS Disconnect power before installing dipshunts for slave modules on
the MMU backplane (slave expander bus). Failure to do so could
result in severe or fatal shock. (p. 3-10)
SPECIFIC
CAUTIONS Ensure that the end marked J1 is connected to P1 on the NICL01,
and J2 is connected to the LIM. Failure to do so could result in mod-
ule damage (see Figure D-1). (p. D-1)

I-E96-621A vii
Sommaire de Sécurité
AVERTISSEMENT
D'ORDRE
GENERAL
Environment de l'equipement
Nes pas soumettre les composantes a une atmosphere corrosive
lors du transport, de l'entreposage ou de l'utilisation.
Risques de chocs electriques lor de l'entretien
S'assurer de debrancher l'alimentation ou de prende les precau-
tions necessaires a eviter tout contact avec des composants sours
tension lors de l'entretien.
Precautions de Manutention
Ce module contient des composantes sensibles aux decharges
electro-statiques.
AVERTISSEMENT
D'ORDRE
SPECIFIQUE
Couper l'alimentation avant d'installer les dipshunts sur la plaque
arrlere du chassis de montage de modules (MMU). Toute negli-
gence a cet egard constitue un risque de choc pouvant entrainer
des blessures graves, voire moretlles (p. 3-10)
ATTENTION
D'ORDRE
SPECIFIQUE
S'assuree que L'extremite identifiee par J1 est reliee a P1 du mod-
ule NICL01 et que J2 est reliee au module LIM. Sinon, les nodules
pouiraient etre endommages (voir la figure D-1). (p. D-1).

Table of Contents
Page
I-E96-621A iii
SECTION 1 - INTRODUCTION....................................................................................................1-1
OVERVIEW ..................................................................................................................1-1
INTENDED USER.........................................................................................................1-2
INTERFACE DESCRIPTION ..........................................................................................1-2
Plant Loop to Computer Transfer Module (INPCT01) ...............................................1-2
Bus Transfer Module (INBTM01) ............................................................................1-2
Loop Interface Module (INLIM03) ............................................................................1-2
FEATURES...................................................................................................................1-3
INSTRUCTION CONTENT .............................................................................................1-3
HOW TO USE THIS MANUAL .......................................................................................1-3
GLOSSARY OF TERMS AND ABBREVIATIONS .............................................................1-4
REFERENCE DOCUMENTS..........................................................................................1-4
SPECIFICATIONS.........................................................................................................1-5
NOMENCLATURE ........................................................................................................1-6
SECTION 2 - DESCRIPTION AND OPERATION........................................................................2-1
INTRODUCTION...........................................................................................................2-1
INTERFACE OPERATION..............................................................................................2-1
Loop Interface Module INLIM03..............................................................................2-1
Bus Transfer Module INBTM01 ..............................................................................2-2
Plant Loop to Computer Transfer Module INPCT01 .................................................2-2
SECTION 3 - INSTALLATION.....................................................................................................3-1
INTRODUCTION...........................................................................................................3-1
SPECIAL HANDLING ....................................................................................................3-1
UNPACKING AND INSPECTION ....................................................................................3-1
INPCT01 SWITCH SETTINGS .......................................................................................3-2
Option Switch (U72)...............................................................................................3-2
Serial Port Communication Rate (U73) ...................................................................3-2
Port Address (U75) .................................................................................................3-4
INLIM03 SWITCH SETTINGS ........................................................................................3-4
INBTM01 SWITCH SETTINGS.......................................................................................3-7
INPBS01 SWITCH SETTINGS .......................................................................................3-8
TERMINATION UNIT (MODULE) CONFIGURATION AND INSTALLATION .......................3-9
INSTALLING THE INTERFACE MODULES ....................................................................3-9
Installing the INPCT01 .........................................................................................3-10
Installing the INLIM03 and INBTM01 ...................................................................3-10
Installing the INPBS01 .........................................................................................3-11
SECTION 4 - OPERATING PROCEDURES................................................................................4-1
INTRODUCTION...........................................................................................................4-1
PLANT LOOP TO COMPUTER TRANSFER MODULE LEDs AND CONTROLS .................4-1
Status LED ............................................................................................................4-2
CPU LEDs..............................................................................................................4-2
Memory LEDs ........................................................................................................4-2
Stop Pushbutton....................................................................................................4-2
Reset Pushbutton ..................................................................................................4-2

iv I-E96-621A
Table of Contents (continued)
Page
®
SECTION 4 - OPERATING PROCEDURES
(continued)
LOOP INTERFACE MODULE LEDs .............................................................................. 4-3
BUS TRANSFER MODULE LED ................................................................................... 4-3
MODES OF OPERATION .............................................................................................. 4-4
Execute Mode........................................................................................................ 4-5
Error Mode ............................................................................................................ 4-5
SECURITY FUNCTIONS ............................................................................................... 4-5
Hardware Checks .................................................................................................. 4-5
Software Checks.................................................................................................... 4-5
Utilities ................................................................................................................. 4-6
SECTION 5 - TROUBLESHOOTING...........................................................................................5-1
INTRODUCTION .......................................................................................................... 5-1
SECTION 6 - MAINTENANCE.....................................................................................................6-1
INTRODUCTION .......................................................................................................... 6-1
MAINTENANCE SCHEDULE ........................................................................................ 6-1
SECTION 7 - REPAIR/REPLACEMENT PROCEDURES...........................................................7-1
INTRODUCTION .......................................................................................................... 7-1
MODULE REPAIR/REPLACEMENT.............................................................................. 7-1
SECTION 8 - SUPPORT SERVICES...........................................................................................8-1
INTRODUCTION .......................................................................................................... 8-1
REPLACEMENT PARTS AND ORDERING INFORMATION ............................................. 8-1
TRAINING.................................................................................................................... 8-1
TECHNICAL DOCUMENTATION................................................................................... 8-1
APPENDIX A - TERMINATION UNIT (NTMF01) CONFIGURATION ........................................A-1
INTRODUCTION ..........................................................................................................A-1
APPENDIX B - TERMINATION UNIT (NTCL01) CONFIGURATION.........................................B-1
INTRODUCTION ..........................................................................................................B-1
APPENDIX C - TERMINATION MODULE (NIMF01) CONFIGURATION ..................................C-1
INTRODUCTION ..........................................................................................................C-1
APPENDIX D - TERMINATION MODULE (NICL01) CONFIGURATION...................................D-1
INTRODUCTION ..........................................................................................................D-1

List of Figures
No. Title Page
I-E96-621A v
1-1. Diagram of Plant Loop to Computer Interface within the INFI 90 Hierarchy ............1-1
3-1. Switch Locations on the PCT (CPU Board) ..............................................................3-2
3-2. LIM Switch Locations .............................................................................................3-5
3-3. BTM Switch (SW1) Location ...................................................................................3-7
3-4. PBS Switch Locations ............................................................................................3-8
4-1. PCT Faceplate LEDs and Controls ..........................................................................4-1
4-2. LIM Faceplate LEDs ...............................................................................................4-3
4-3. BTM Faceplate LEDs..............................................................................................4-4
4-4. Utilities Menu ........................................................................................................4-6
4-5. TALK90 Command Menu .......................................................................................4-7
4-6. RESTART/DEMAND MODULE STATUS Commands/Replies .................................4-9
4-7. Plant Loop Statistics ............................................................................................4-10
4-8. Message Rate Adjustment Menu ..........................................................................4-11
A-1. NTMF01 Disphunt Configurations......................................................................... A-1
A-2. DB-25 Pin Assignments and RS-232-C Signals ..................................................... A-2
B-1. Jumper Settings and Cable Types ......................................................................... B-1
B-2. NTCL01 Termination Unit and Terminal Assignments ........................................... B-2
C-1. NIMF01 Dipshunt Configurations ......................................................................... C-1
D-1. Jumper Settings and Cable Types ......................................................................... D-2
D-2. Typical Twinax Cable Connection for the NICL01 .................................................. D-2
List of Tables
No. Title Page
3-1. Option Switch (U72) Settings ................................................................................3-3
3-2. Serial Port Communication Rate (U73) ...................................................................3-3
3-3. U75 PCT Port Address............................................................................................3-4
3-4. LIM Event Counter Addresses (SW1) ......................................................................3-5
3-5. LIM Error Counter Addresses (SW1) .......................................................................3-6
3-6. LIM Node Address Setting (SW2) ............................................................................3-6
3-7. BTM Options (SW1)................................................................................................3-7
3-8. SW1 PBS Device Number .......................................................................................3-8
3-9. SW2 PBS Slave Expander Bus Address ..................................................................3-9
4-1. PCT Status LED States ..........................................................................................4-2
4-2. BTM Status LEDs States........................................................................................4-4
5-1. PCT CPU Codes......................................................................................................5-1
5-2. LIM Edge Connector P3 Pin Assignments ...............................................................5-2
5-3. BTM Edge Connector P1 Pin Assignments ..............................................................5-2
5-4. PCT CPU Board Edge Connector P2 Pin Assignments ............................................5-2
5-5. PCT CPU Board Edge Connector P3 Pin Assignments ............................................5-3
6-1. Maintenance Schedule ...........................................................................................6-1
B-1. NTCL01 Terminal Assignments ............................................................................. B-1
D-1. NICL01 Terminal Assignments .............................................................................. D-1
D-2. D-2. BNC Connector Assignments ....................................................................... D-1

OVERVIEW
I-E96-621A 1 - 1
SECTION 1 - INTRODUCTION
OVERVIEW
The Plant Loop to Computer Interface (INPCI02) enables a com-
puter to communicate with any node on the INFI 90 Plant Loop
through a RS-232-C interface or an optional IEEE-488 parallel
interface. Three modules make up the Plant Loop to Computer
Interface: the Plant Loop to Computer Transfer Module
(INPCT01), the Bus Transfer Module (INBTM01), and the Loop
Interface Module (INLIM03). One optional module, the Parallel
Bus Slave (INPBS01), is a General Purpose Interface Bus
(GPIB) providing parallel communication. Figure 1-1 shows the
PCI in a typical application.
Figure 1-1. Diagram of Plant Loop to Computer Interface within
the INFI 90 Hierarchy
COMMUNICATION HIGHWAY (PLANT LOOP)
MODULE BUS
NTCL01
INLIM03 INBTM01 INPCT01
NTMF01
COMPUTER
T00416A
COAX OR
TWINAX CABLE
NKLM01
DMA CABLE
NKTU01
RS-232-C

INTRODUCTION
INTENDED USER
1 - 2 I-E96-621A
®
INTENDED USER
Engineers and technicians should read this manual before
installing the modules and operating the PCI. DO NOT place
the PCI in operation before reading this instruction. You can
refer to the Table of Contents to find specific information after
the module is operating.
INTERFACE DESCRIPTION
The Plant Loop to Computer Interface enables a host computer
to communicate with any node on a Plant Loop. PCI software
enables the computer to acquire data, do process monitoring
and control (execute control algorithms), and carry out routine
system functions (security, time, configuration and tuning).
This interface is made up of three INFI 90 Communication
Modules. The Plant Loop to Computer Transfer Module pro-
vides two RS-232-C ports on the computer side of the inter-
face. The Loop Interface Module provides a serial interface on
the Plant Loop side. The Bus Transfer Module transfers infor-
mation from the Plant Loop to the Module Bus. An optional
interface module, the Parallel Bus Slave provides one
IEEE-488 parallel port.
Plant Loop to Computer Transfer Module (INPCT01)
This module processes incoming and outgoing computer com-
mands and messages, buffers data, and communicates with
the BTM on the module bus. The PCT is a double circuit board
module. It has a memory board and CPU board. The user
selects general operating characteristics, control commands
and point definitions through software configuration. Other
characteristics such as port data characteristics and options
are user-configured through dipswitches on the CPU board.
Bus Transfer Module (INBTM01)
The BTM is responsible for translating messages from the LIM
and placing them on the module bus. It also receives messages
from the PCT. It translates those messages and sends them to
the LIM through a direct memory access (DMA) cable.
Loop Interface Module (INLIM03)
The LIM provides the communication link between the Plant
Loop and the PCT. It receives messages from Plant Loop nodes
and monitors loop status. The LIM forwards messages from
the loop to the PCT (though the BTM) via a direct memory
access (DMA) cable. Additionally, it receives messages from the
PCT (through the BTM) and sends them to the proper node on
the loop.

INTRODUCTION
FEATURES
I-E96-621A 1 - 3
FEATURES
The Plant Loop to Computer Interface provides communication
between a host computer and INFI 90 Plant Loop. The modular
design of the interface modules, as with all INFI 90 modules,
allows for flexibility when creating a process management sys-
tem strategy.
The PCI gives the user up to 5,000 point definitions. The LIM/
BTM pair provides data security and integrity through
on-board diagnostics, module time checks and handshaking.
Interface firmware combined with PCT microprocessor based
hardware makes this interface a powerful control tool that the
user can configure for almost any application.
INSTRUCTION CONTENT
This document is divided into eight sections. Introduction
provides an overview of the individual modules of the PCI, a
list of related documents, glossary of terms and abbreviations,
and specifications. Description and Operation explains how
PCI communication occurs. Installation covers preliminary
module setup, physical installation and configuration. Operat-
ing Procedures explains faceplate LEDs, controls, and inter-
face operating modes. Troubleshooting explains how to
troubleshoot problems with the interface modules using error
codes and status byte information, and lists the corrective
action. Maintenance contains a maintenance schedule for the
slave module. Repair/Replacement Procedures explain how
to replace the PCI modules. Support Services explains the
customer training Bailey Controls Company provides and
information about ordering replacement parts.
HOW TO USE THIS MANUAL
Read this manual in sequence. It is important to become famil-
iar with the entire contents of this manual before using the
PCI. The organization of this manual enables the user to find
needed information quickly.
1. Read and do the steps in Section 3.
2. Read Section 4 thoroughly before powering up the inter-
face.
3. Refer to Section 5 if a problem occurs.
4. Refer to Section 6 for scheduled maintenance require-
ments.
5. Use Section 8 for a list of replacement parts and warranty
information.

INTRODUCTION
GLOSSARY OF TERMS AND ABBREVIATIONS
1 - 4 I-E96-621A
®
GLOSSARY OF TERMS AND ABBREVIATIONS
REFERENCE DOCUMENTS
The following documents provide additional information about
INPCI02 support hardware and software.
Term Definition
DCE Data Circuit-Terminating Equipment - The termination point of a communication cir-
cuit such as a line driver or modem.
DTE Data Terminal Equipment - End-user machine of a communication circuit such as a
terminal or computer.
Dipshunt A dual in-line package with shorting bars.
Module Bus The serial communication link between a process control module and other process
control modules.
Node Device(s) on the INFI 90/Network 90 Plant Loop, Superloop or INFI-NET (maximum
of 63 on Plant Loop, 250 on Superloop/INFI-NET). A node can be a Operator Inter-
face Station (OIS), a Process Control Unit (PCU) or Engineering Work Station (EWS)
in any combination.
PCI Plant Loop to Computer Interface (INPCI01/02) - A Plant Loop communication inter-
face that provides configuration and control of the Plant Loop through a host com-
puter.
PCU Process Control Unit - rack type industrial cabinet that contains master, slave and
communication modules, and their communication paths.
Plant Loop INFI 90 data communication highway with 63 node capacity.
RS-232-C One in a series of standards developed by the Electronics Industry Association (EIA)
that specifies what signals and voltages will be used to transmit data from DTE (com-
puter) to DCE (modem).
Slave Expander Bus Parallel address/data bus between the master module and the slave.
XR Exception Report - A function block that reports a monitored point value when that
value changes and is polled by a communication or master module.
Document Name Document Number
Enhanced CIU Programmer's Reference Manual I-E93-905-2
Function Code Application Manual I-E93-900-20
Loop Interface/Bus Interface Module (INLIM03/
INBIM02) I-E96-611
Plant Loop to Computer Interface (INPCI01) I-E96-620
Site Prep and Planning I-E93-900-5
Termination Unit Manual I-E93-911

INTRODUCTION
SPECIFICATIONS
I-E96-621A 1 - 5
SPECIFICATIONS
Ports 2 Full duplex serial data EIA standard RS-232-C Type Z
(A Bailey defined binary interchange)
One optional IEEE-488 Parallel
Memory
PCT
LIM
BTM
UVR0M: 128 kbytes
RAM: 512 kbytes
NVRAM: 8 kbytes
RAM: 2 kbytes
ROM: 4 kbytes
RAM: 32 kbytes
ROM: 16 kbytes
Power Requirements
PCT
LIM
BTM
+5 VDC at 6 amps; 30 watts nominal
+15 VDC at 37 mA; 0.55 watts nominal
-15 VDC at 18 mA; 0.27 watts nominal
+5 VDC at 2.0 amps: 10 watts nominal
±15 VDC at 80 mA; 1.2 watts nominal
+ 5 VDC at 1.0 amps; 5 watts nominal
+ 15 VDC at 150 mA; 2.25 watts nominal
- 15 VDC at 120 mA; 1.80 watts nominal
Communication Rates 50 to 19,200 baud (user-selectable)
Mounting Occupies four slots in standard INFI 90 Module Mounting Unit (MMU).
Occupies five slots with the optional INPBS01.
Environmental
Electromagnetic/Radio
Frequency Interference
Ambient Temperature
Relative Humidity
Altitude
Air Quality
Values are not available at this time. Keep cabinet doors closed. Do not
use communication equipment any closer than two meters from the
cabinet.
0oto 70oC (32oF to 158oF)
0 to 95% up to 55oC (131oF) (non-condensing)
0 to 45% at 70oC (158oF) (non-condensing)
Sea level to 3 Km (1.86 miles)
Non-corrosive
Certification All INPCI02 modules have been individually CSA certified for use as
process control equipment in an ordinary (non-hazardous)environment.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

INTRODUCTION
NOMENCLATURE
1 - 6 I-E96-621A
®
NOMENCLATURE
Hardware Nomenclature
Communication Termination Module Cable NICL01
NKLS04
Communication Termination Unit Cable NTCL01
NKLS03
Field Termination Panel NFTP01
Module Mounting Unit IEMMU01/02
Multi-Function Controller Termination Module Cable NIMF01
NKTM01
Multi-Function Controller Termination Unit Cable NTMF01
NKTU01
Termination Mounting Unit NTMU01/02

INTRODUCTION
I-E96-621A 2 - 1
SECTION 2 - DESCRIPTION AND OPERATION
INTRODUCTION
The Plant Loop to Computer Interface (INPCI02) enables a host
computer to interact with all nodes on an INFI 90 Plant Loop.
The Plant Loop is a unidirectional serial data highway that all
nodes (and other data users) share. The PCI provides an
RS-232-C serial interface and an optional IEEE-488 parallel
interface that links the Plant Loop to the host computer. This
section covers the functional operation of the modules that
make up the PCI.
INTERFACE OPERATION
The INPCI02 consists of three modules:
•Loop Interface Module (INLIM03)
•Bus Transfer Module (INBTM01)
•Plant Loop to Computer Transfer Module (INPCT01)
The Parallel Bus Slave (INPBS01) is an optional module that
provides parallel communication between the host computer
and the PCT. The PBS is an IEEE-488 compatible General Pur-
pose Interface Bus (GPIB) device. Modules making up the PCI
occupy four slots in the Module Mounting Unit (five when
using a PBS).
Loop Interface Module INLIM03
The Loop Interface Module is the communication interface to
the Plant Loop. The LIM sends and receives messages from
other LIMs on the Plant Loop. LIMs can transmit and receive
messages simultaneously at any time. There is no loop master
or traffic director. LIM start-up/shutdown is localized requir-
ing no interaction with other LIMs on the loop. Each LIM
receives all incoming messages and transmits a new stream of
messages in a store and forward fashion to the next LIM.
The LIM can originate messages in its transmit buffer; how-
ever, messages usually come from the INBTM01. The LIM com-
municates directly with the BTM. It has access to the BTM
memory through a direct memory access (DMA) cable. Besides
sending messages from the BTM, the LIM informs the BTM
when it successfully sends a message or discards a message
destined for off-line nodes. The LIM can count events and
errors (refer to Table 3-4 and 3-5) and display those counts on
the faceplate LEDs.

DESCRIPTION AND OPERATION
INTERFACE OPERATION
2 - 2 I-E96-621A
®
Bus Transfer Module INBTM01
The Bus Transfer Module handles communication between the
LIM and PCT modules. It channels Plant Loop information to
local modules on the module bus. It also gathers data from the
Module Bus and prepares it for transmission by placing it in
the Plant Loop message format. The BTM places the formatted
message in a 512 byte circular transmit buffer and sends an
interrupt request to the LIM. The message moves into the LIM
transmit buffer when it is free. If message transmission is suc-
cessful, the LIM informs the BTM that the message was sent.
In the unlikely event of a message error, the BTM responds
with message retries up to 127 times. If transmission is unsuc-
cessful after 127 retries, the destination node is marked
off-line. When the node is marked off-line, the LIM informs the
BTM that further communications with that destination must
be deferred until it responds normally.
The LIM and BTM maintain handshakes so that each can tell if
the other is operational. There are timers associated with both
modules that are set by one module and reset by the other. If
the module responsible for reset finds the timer already reset,
it is assumed that the other module failed.
Plant Loop to Computer Transfer Module INPCT01
The PCT provides the electronics needed to direct the operation
of the interface. It handles all communication with the host
computer through an RS-232-C serial communication port and
communicates directly with the BTM over the module bus.
When communicating through the serial port, the PCT acts as
Data Circuit-Terminating Equipment (DCE).
The PCT has enough memory that it can store up to 5,000
point definitions. INPCI02 firmware enables the host computer
to issue commands for data acquisition, process monitoring
and control, and system functions (security, time and configu-
ration control). The PCT maintains the point table and inter-
prets commands coming from the host computer. Thus, it
directs all interaction between the computer and the Plant
Loop.

INTRODUCTION
I-E96-621A 3 - 1
SECTION 3 - INSTALLATION
INTRODUCTION
This section explains how to prepare the Plant Loop to Com-
puter Interface (INPCI02) modules for installation. It covers
handling procedures, switch settings for each module, termi-
nation unit/module and cable, and module installation. DO
NOT attempt to operate the PCI before reading and completing
the steps in this section.
SPECIAL HANDLING
The interface modules use CMOS devices. Follow the special
handling procedures below:
NOTE: Always use Bailey's Field Static Kit (P/N 198385A2 - con-
sists of wrist strap, ground cord assembly, and alligator clip) when
working with modules. The kit is designed to connect a technician
and the static dissipative work surface to the same ground point to
prevent damage to the modules by electrostatic discharge.
1. Keep the modules in the special anti-static bag until you
are ready to install them in the system. Save the bag for future
use.
2. Ground the anti-static bag before opening.
3. Verify that all devices connected to the modules are prop-
erly grounded before using them.
4. Avoid touching the circuitry when handling the modules.
UNPACKING AND INSPECTION
1. Examine the modules immediately to verify that no damage
has occurred in transit.
2. Notify the nearest Bailey Controls Sales Office of any dam-
age.
3. File a claim for any damage with the transportation com-
pany that handled the shipment.
4. Use the original packing material and/or container to store
the modules.
5. Store the modules in an environment of good air quality,
and free from temperature and moisture extremes.

INSTALLATION
INPCT01 SWITCH SETTINGS
3 - 2 I-E96-621A
®
INPCT01 SWITCH SETTINGS
The INPCT01 consists of two circuit boards, a memory board
and a CPU board. The memory board has no user-configurable
operating options. The CPU board has three dipswitches that
set the module operating characteristics. These switches pro-
vide the means of establishing I/O functions, serial port com-
munication rate, and port address. Figure 3-1 shows the
dipswitch locations on the CPU board.
NOTE: Jumpers J1 through J3 are factory set. Do not change the
jumper settings.
Option Switch (U72)
U72 is an eight position dipswitch that determines the operat-
ing options of the module. Table 3-1 lists the U72 option set-
tings. Record the U72 settings in the space provided.
Serial Port Communication Rate (U73)
U73 is an eight pole dipswitch that sets the serial port commu-
nication rate. The communication rate directly affects data
throughput. Refer to Tables 3-2 for communication rates.
Record the U73 setting in the space provided.
Figure 3-1. Switch Locations on the PCT (CPU Board)
T00387A
P1
P2
P3
STOP SW2
OPTION
SWITCH BAUD RATE SWITCH
JUMPERS
J1, J2, J3
DIAGNOSTICS
SWITCH
U72 U73 U75
RESET SW1
1234
OPEN
5678 1234
OPEN
5678 1234
OPEN
5
J1 J2 J3

INSTALLATION
INPCT01 SWITCH SETTINGS
I-E96-621A 3 - 3
Table 3-1. Option Switch (U72) Settings
Position Setting1Function User Setting
10
1
ROM checksumming enabled
ROM checksumming disabled
2/3 0/0
0/1
1/0
1/1
Ports 0 and 1 data characteristics.
8 data bits, 1 stop bit, no parity
8 data bits, 1 stop bit, even parity
8 data bits, 1 stop bit, odd parity
8 data bits, 2 stop bit, no parity
40
1
Port 1 option serial port to host
Port 1 utility option2
50
1
Modem password protection disabled
Modem password protection enabled
60
1
Port addressing mode disabled
Port addressing mode enabled3
70
1
Checksumming option disabled
Checksumming option enabled4
8 NA This dipswitch position is undefined.
NOTES:
1. 0 = Closed (on)
1 = Open (off)
2. If this option is selected, port 1 data characteristics are automatically set to 8 data bits, 1 stop bit, no parity. Otherwise, port 1 data
characteristics are set by dipswitch positions 2/3.
3. When this option is enabled, the PCT will expect all commands from the host to send the port address selected ondipswitchU75 as the
first character of each command.
4. When this option is enabled, the PCT will expect all commands from the host to include a checksum byte as the last character before
the carriage return. The PCT includes a checksum in each reply.
Table 3-2. Serial Port Communication Rate (U73)
Baud Rate Switch Position User Setting Port0Port1Port0Port1
1234567812345678
50 00000000
75 10001000
110 01000100
134.5 11001100
150 00100010
300 10101010
600 01100110
1200 11101110
1800 00010001
2000 10011001
2400 01010101
3600 11011101
4800 00110011
7200 10111011
9600 01110111
19200 11111111
0 = Closed (on)
1 = Open (off)