B - Glossary Of Terms - Partlow MIC 2000 Installation And Operation Manual

Appendix B
Glossary of Terms
Automatic Reset (Integration)
Automatic reset is a Tune mode parameter that will bias the proportional output(s) to compen-
sate for process load variations. This parameter is adjustable from 0.0 to 100.0 repeats per
minute. Factory default is 0.0. The display codes is ArSt.
Automatic Transfer
Automatic transfer is a Program mode parameter that will allow the instrument to switch from
the Manual to the Control mode of operation automatically when the process value reaches
setpoint.
Balanceless Transfer
This feature prevents changes in proportional output when changing from the Manual to
Control mode of operation. When transferring from the manual mode to the control mode, the
proportional outputs will be "balanceless" regardless of whether the unit is inside or outside
the proportional band. This only holds true if the Auto Reset (ArSt) value is greater than 0.
Bumpless Transfer
This feature prevents changes in proportional outputs when changing from the Control to the
Manual mode of operation only.
Control Algorithm
A pre-programmed series of instructions that are used by the instrument when
determining the status of the output(s).
Cycle Time
This Tune mode parameter is used to select the on/off cycle time for time proportioning
outputs (Ct1 for Output 1 and/or Ct2 for Output 2). (See page 29, section 4.5)
When using the Position Proportioning option, Ct1 must be selected for the stroke time of the
motor.
Display Filter Factor
This Program mode parameter is used to dampen the process value displayed. The selec-
tions range from 1 through 20, the value represents the number of process scans that will be
averaged for the display value. Factory default is 1, no filtering.
Engineering Units Upper and
Engineering Units Lower
These Program mode parameters are used with volt, millivolt, and milliamp inputs. The
Engineering Units Upper Euu should be selected as the value to be displayed when the input
is at maximum. The Engineering Units Lower EuL should be selected as the value to be
displayed when the input is at minimum.
First Output Position
This parameter is adjustable from -1000 to 1000 units and represents a shift or offset of the
on-off actuation points or proportional band for the first output relative to the normal position.
For example, a negative value could be used to offset an expected overshoot. First Output
Position also shifts the proportional band with respect to the process value range outside of
which integral action is inhibited. Factory default is 0. Display code FoP.
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