Section 2 - Description And Operation; Introduction; Iiois12 Functional Operation - Bailey Infi 90 IIOIS12 Hardware Manual

INTRODUCTION

IIOIS12 FUNCTIONAL OPERATION

I-E96-107-2N

SECTION 2 - DESCRIPTION AND OPERATION

This section explains the inputs, control logic and communica-
tion for the IIOIS12 Operator Interface Station. An operator
uses the OIS to monitor and control the process. The OIS
shows equipment status and process states with interactive
colour graphic displays.
The display is 1024 x 768 pixels with any of the available
colours. Each display can use dynamic variables and symbols
allowing data to be condensed in each display. Any graphic
element can be mixed with any symbol on any display such as
schematics, faceplates, trends and alarm summaries.
Figure 2-1 shows a block diagram of the IIOIS12. This block
diagram shows the signal flow for the IIOIS12. Refer to this fig-
ure when reading the description.
Process data from the Plant Loop or INFI-NET enters the OIS
through the Network Interface Unit (NIU).
Three cards in the six-slot multibus chassis make up the NIU.
They are the Multibus Communication Loop Termination Mod-
ule (IIMCL01), Multibus Loop Module (IIMLM01) and Multibus
Communication Processor Module (IIMCP01). The MCL mod-
ule in slot three of the multibus chassis connects to the loop.
Front edge connectors on the MCL terminate redundant coax-
ial or twin axial cable of the loop. A ribbon cable connects the
MCL to the MLM module in slot five. The MLM allows the MCL
and the MCP to communicate together. A ribbon cable con-
nects the MLM to the MCP module. A cable connects the MCP
to the NIU connector on the cable connector panel.
The computer contains the Intel 60-MHz, 32-bit, 586 Pentium
processor (minimum) and 24 megabytes (minimum) of
dynamic RAM memory.
The NIU modules are powered from the multibus chassis back-
plane. Multibus NIU cards communicate to the computer over
a serial cable from the MCP to the computer serial card.
The computer's serial interface card allows the processor to
communicate with the communication loop interface (first
port) and OIS mylar keyboard (second port).
The Multibus Keyboard Module (IIMKM01), mounted in slot one
of the multibus chassis, connects the keyboard interface panel
INTRODUCTION
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