- EPROM Resident
- Implements Latest HART Specification (6.0)
- Now supports All HART Commands!
- Conformance Classes: 1, 1A, 2, 3, 4 & 5
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- Installation in retrofit or new systems
- Single and Dual Port Versions
- Polls up to 15 HART Slave Devices per port
- Standard Ladder Logic COMMREQ's
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- RS232
- Hart Modem Required (RS232 to Current Loop converter)
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- GE Series 90-30 (PCM 301, 311)
- GE Series 90-70 (PCM 711)
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CPI's HART (Highway Addressable Remote Transducer) protocol driver family is a series
of compiled, EPROM based programs designed for operation on the GE Fanuc 90-30 or
90-70 series Programmable Coprocessor Modules (PCM's), Our drivers provide a very
simple and economical way to enable HART communications capabilities from a GE FANUC
series 90 PLC.
The HART driver family of products provide communications between the GE Fanuc PLC
and Intelligent HART compliant field devices. The communications is performed over
a two wire twisted pair current loop network. A HART Modem is required between the
PCM module and the HART field devices.
CPI's HART drivers support all HART Commands. Universal Commands can be configured to
return data in Byte Packed Format or in a user friendly "Smart Format". All other HART
Commands return data in byte packed format. A series of user accessable utilities are
made available to the user making it easy to format the data from any command into a
user friendly format.
Our HART drivers are easy to configure and use. Configuration, Commands and Utilities
are all accessed through standard Ladder Logic COMMREQ commands. Data is returned into
PLC memory.
HART is a master/slave asynchronous communications protocol run on top of the 4-20mA current
loop signal. The Bell 202 Frequency Shift Keying (FSK) standard at 1200 baud is used as the
communications medium. Up to 15 devices (slaves) can be connected to a single HART network
along with two masters (primary and secondary). This type of configuration is referred to
as multi-drop. Each device, up to 15, must be configured with a unique polling address
from 1 to 15, and must be connected in parallel. When more than one device is multi-dropped
on the network, the analog 4-20mA signal is not available and is held at 4mA. The HART
driver residing on the PCM acts as one master, configurable as primary or secondary.
The second master is typically a configuration device such as the "HART Communicator.
The driver is stored as a non-volatile, binary file on one of the PCM EPROM's. The program begins
execution during PCM module power up or after a hard or soft reset of the PCM module.
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