Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-2 September 2014
Page 225
Process Variable (PV)
Process Variables are the parameter to be controlled. Each control loop monitors its PV via
one of the process inputs. PVs can be any type that can be measured by these circuits.
Common types are thermocouple or RTD temperature probes, or pressure, level, flow etc
from transducers that convert these parameters into DC linear input signals (e.g. 4 to 20mA).
Linear signals can be scaled into engineering units using the input upper & lower limits.
Also refer to: Engineering Units; Input Span; Linear Input; Process Input; RTD; Scaled Input
Lower Limit; Scaled Input Upper Limit and Thermocouple.
Process Variable Offset
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Profile Control Menu
If the profiler option is fitted, a profile control menu is available from the main menu. It allows
the user to select or run a profile, and then control that profile (run, hold, abort, skip to next
segment etc.).
Refer to the Profiler Control Menu information in the Configuration & Use section.
Also refer to: Main Menu; Profile Setup Menu; Profiler and Profiler Mode.
Profile Events
Events are outputs that can be made active during profile segments. Any of the five events
tracks can be configured to be active or inactive for the duration of each segment, from the
profile setup menu. For end segments, events selected to be stay active until the unit is
powered down or a new profile runs. It is possible to logically link event and alarms to
outputs with a boolean OR or AND selection.
Also refer to: Alarm Types; Logical Combinations; Profile Segments; Profile Setup Menu;
Profiler and Profiler Mode.
Profile Header
The profile header contains information about how the profile starts and stops, the power
loss recovery action, if the profile should repeat multiple times when run as well as whether
the profile runs as a single or two loop profile.
Refer to the Profile Components information in the Profiler Option section of this manual.
Also refer to: Profile Segments, Profile Setup Menu, Profiler and Profiler Mode.
Profile Segments
Segments can be ramps, dwells, steps or special segments such as holds, loop-backs, ends
or joins. A maximum of 255 segments are possible, shared amongst up to 64 profiles.
Refer to the Profile Components information in the Profiler Option section of this manual.
Also refer to: Profile Events, Profile Setup Menu, Profiler and Profiler Mode.
Profile Setup Menu
If the Profiler option is fitted, a profile setup menu is available from the main menu. It allows
the user to create or edit the profile header and profile segments. Profiles can also be
deleted from this menu. This menu is protected by a lock code.
Refer to the Profiler Setup Menu information in the Configuration & Use section.
Also refer to: Lock Codes; Profile Control Menu; Profile Header; Profile Segments; Profiler
and Profiler Mode.
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