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| HART /
PROFIBUS DP Gateway GT200-HT-DP Application in cement industry
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Keywords
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| HART, PROFIBUS, HART/PROFIBUS
conversion module
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System Composition
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The entire production line's automatic
control system consists of three parts: field equipment, various controllers in the PLC room,
and central control system in the control room. The central control system communicates with
various PLC controllers via the PROFIBUS DP. The controller is responsible for collecting or
controlling all kinds of field devices 100 meters away.
There are 36 temperature
measurement points and 56 pressure measurement points at the rotary kiln site. The control
system needs to monitor these measurement points in real time. In order to save the cost of
the cable, the instrument on these measuring points is two-wire system (two power lines),
among them, 36 temperature transmitters adopt HART communication protocol. SST Automation
HART/ PROFIBUS DP gateway GT200-HT-DP converts the
HART protocol data of the on-site temperature transmitter to PROFIBUS data and uploads it to
the control system.
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The chart is wiring diagram in the
shop floor. From the rotary kiln to the PLC control room, it needs three pairs of 24V power
cords up to 200 meters in length. For each pair of power cords, 12 temperature transmitters
are connected in parallel in the field, and three GT200-HT-DP and 24V power
supplies are connected to the PLC control room.
GT200-HT-DP can connect up
to 15 on-site HART protocol devices and map the temperature values of the 12 temperature
transmitters to the PROFIBUS, so that the control system in the control room can read data of
each temperature transmitter by addressing the GT200-HT-DP gateway, then
handle with corresponding questions.
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HART/PROFIBUS DP Gateway Configuration
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In this case, customer needs to
configure the GT200-HT-DP and HART
instuments:
a.Configure HART slave device short address
b.Configure GT200-HT-DP in SST-HT-CFG
software and command for read/write HART slave device parameter
c.Set PROFIBUS address
d.Import GT200-HT-DP GSD file and
proceed modeling in PROFIBUS DP master control system
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Conclusion
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The advantages of HART/ PROFIBUS gateway GT200-HT-DP:
1. Reduced wiring costs
2. Increased control capabilities, through the GT200-HT-DP gateway, the measured
value of the instrument is directly transmitted to the control system through the PROFIBUS. The
control system can directly read out the measured values in the field and facilitate the subsequent
processing.
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