INTRODUCTION
HARDWARE DESCRIPTION
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I-E96-624A
®
HARDWARE DESCRIPTION
The Plant Loop to Plant Loop Remote Interface acts as another
node on the Plant Loop. The interface consists of three modules
on a dedicated module bus.
Plant Loop to Plant Loop Transfer Module (INPPT01)
This module processes incoming and outgoing Plant Loop mes-
sages, buffers data and communicates with other PPT modules
in remote Plant Loops. The PPT is a double circuit board mod-
ule. It has a memory board and CPU board. The user selects
general operating characteristics and point definitions through
software configuration. Other characteristics such as type of
control (one-way or two-way), Node ID and port 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 PPT. 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 PPT. It receives messages from Plant Loop nodes
and monitors loop status. The LIM forwards messages from the
loop to the PPT (though the BTM) via a direct memory access
(DMA) cable. Additionally, it receives messages from the PPT
(through the BTM) and sends them to the proper node on the
loop.
Additional Hardware
Some applications require additional hardware such as a
modem network, radio link or microwave link. This hardware is
not part of the INPPR01 standard hardware. INFI 90 Digital
Slave Modules (IMDSO01 through IMDSO04, IMDSM05) sup-
port control signals to these devices.
FEATURES
The Plant Loop to Plant Loop Remote Interface provides com-
munication between a local loop and one or more remote loops.
This interface has user selectable control modes. Selecting the
one-way mode enables a local loop to receive exception reports
from up to 32 remote loops. In the one-way mode, only the
local loop can initiate control commands. The two-way mode
enables bidirectional control and exception reporting between
