Set Points - ero electronic LFS Manuel De Service

E ) E ) E ) E ) E ) CURRENT TRANSFORMER INPUT FOR CURRENT TRANSFORMER INPUT FOR CURRENT TRANSFORMER INPUT FOR CURRENT TRANSFORMER INPUT FOR CURRENT TRANSFORMER INPUT FOR
OUT1 FAILURE DETECTION OUT1 FAILURE DETECTION OUT1 FAILURE DETECTION OUT1 FAILURE DETECTION OUT1 FAILURE DETECTION
The instruments equipped with this feature are
capable, by means of a CT, to detect and signal a
possible failure of the line driven by out 1 (see
"OUT 1 failure detection").
Measurement category Measurement category Measurement category Measurement category Measurement category: CAT III
Input range Input range: 50 mA AC. Input range Input range Input range
Scaling Scaling Scaling Scaling Scaling: programmable from 10 A to 100 A (with
1 A step).
R e s o l u t i o n R e s o l u t i o n R e s o l u t i o n :
R e s o l u t i o n R e s o l u t i o n
- for full scale up to 20 A: 0.1 A.
- for full scale from 21 A to 100 A: 1 A
Minimum duration of the period (ON or OFF) Minimum duration of the period (ON or OFF) Minimum duration of the period (ON or OFF) Minimum duration of the period (ON or OFF) Minimum duration of the period (ON or OFF)
to to to to to perform perform perform perform perform the the the the the measurement measurement measurement measurement: measurement
NOTE NOTE NOTE :
NOTE NOTE
–
this function excludes excludes excludes excludes excludes the logic input (external set
point selection).
–
Currente Transformer must be compliant with
EN 60950 standard for clearance and creepage
distances.

SET POINTS

SET POINTS SET POINTS SET POINTS SET POINTS
This instrument allows to use 2 set points: SP and SP2.
The set point selection is possible only by logic
input.
Set point transfer Set point transfer Set point transfer: Set point transfer Set point transfer
The transfer between one set point to another (or
between two different set point values) may be
realized by a step transfer or by a ramp with two
different programmable rate of change (ramp up
and ramp down).
Slope value Slope value
Slope value Slope value: 1 - 100 eng. unit/min or step. Slope value
Set points limiter Set points limiter Set points limiter Set points limiter Set points limiter: RLO and RHI parameters,
programmable.
LFS-1-CC.P65 30
CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS CONTROL ACTIONS
Control action Control action Control action Control action Control action: PID + SMART
Type Type: One (heating or cooling) or two (heating Type Type Type
and cooling) control outputs.
Proportional Band Proportional Band (Pb): Proportional Band Proportional Band Proportional Band (Pb): (Pb): (Pb): (Pb):
Range: - from 1.0 to 100.0 % of the input span for
process with one control output.
- from 1.5 to 100.0 % of the input span for
process with two control output.
When Pb=0, the control action becomes ON/OFF.
Hysteresis (for ON/OFF control action): Hysteresis Hysteresis Hysteresis Hysteresis
from 0.1% to 10.0% of the input span.
Integral time (Ti): from 1s to 20 min. or Integral time (Ti) Integral time (Ti) Integral time (Ti) Integral time (Ti)
400 ms. excluded.
Derivative time (Td): from 0 s to 10 min. Derivative time (Td) Derivative time (Td) Derivative time (Td) Derivative time (Td)
If zero value is selected, the derivative action is
excluded.
Integral pre-load: Integral pre-load Integral pre-load Integral pre-load Integral pre-load
- from 0.0 to 100.0 % for one control output
- from -100.0 (cooling) to +100.0 % (heating) for
two control output.
SMART: keyboard enabling/disabling SMART SMART SMART SMART
Auto/Manual Auto/Manual: selectable by front pushbutton. Auto/Manual Auto/Manual Auto/Manual
Auto/Manual transfer: bumpless method type Auto/Manual transfer Auto/Manual transfer Auto/Manual transfer Auto/Manual transfer
Indicator "MAN" Indicator "MAN" : OFF in auto mode and lit in Indicator "MAN" Indicator "MAN" Indicator "MAN"
manual mode.
O U T P U T S O U T P U T S O U T P U T S O U T P U T S O U T P U T S
Control output updating time : Control output updating time Control output updating time Control output updating time Control output updating time
- 250 ms when a linear input is selected
- 500 ms when a TC or RTD input is selected.
Action Action: direct/reverse programmable by front Action Action Action
keyboard.
Output level indication: Output level indication: Output level indication: Output level indication: Output level indication:
The instrument displays separately the output 1
level (heating) and the output 2 level (cooling).
GB GB GB GB GB 30
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