Emerson Tescom ER5000 Series, Руководство пользователя, Страница: 30 / 248

ER5000 —
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How It Works
The ER5000: How It Works
The ER5000 (Electronic Regulator 5000) is a microprocessor-based
PID (Proportional, Integral, Derivative) controller that brings precise
algorithmic pressure control to a wide range of applications.
It can be used as a standalone unit to control the pressure of clean,
dry inert gases from 0–100 psig / 0–6.9 bar or be connected to any
pneumatically actuated regulator or valve. Used with TESCOM™
regulators, the ER5000 provides distributed pressure control of
gases and liquids from vacuum to 30,000 psig / 2068 bar, with a Cv
of up to 12.
The ER5000 can be controlled from any PC via a direct USB or
RS485 connection. The ER5000 also accepts analog setpoint
signals from 4–20 mA, 1–5V or 0–10V analog sources, such as
from a PC or PLC D/A card. The ER5000 can be wired to allow for
multiple input/output configurations and daisychaining of up to 32
controllers within the same RS485 network.
The ER5000 senses pressure using either its internal sensor or an
external transducer (4–20 mA, 1–5V or 0–10V) placed within the
actual process line. You can operate the ER5000 in one of three
control modes:
• Internal Feedback, which uses only the internal sensor;
•
External Feedback, which uses only the external source;
• Cascade, which uses both internal and external sources in a
“loop within a loop” configuration.
During setup, you can download PID settings that have been
programmed by TESCOM to meet the needs of most commercial
applications. The included ERTune™ program provides an intuitive
interface to customize the performance parameters of the ER5000
by directly tuning the Proportional, Integral and Derivative values.
Using the ERTune™ program, you can create Profiles, which guide
the ER5000 through command sequences that may include
multiple setpoint changes, precisely timed digital inputs and
outputs and modification of response characteristics and other
internal variables based on real-time operational conditions.
The ER5000 installs in just minutes, yet provides the precision,
dependability and flexibility to meet the needs of the most
demanding user.