Emerson Digistart IS1x0043B series - Page 59

Safety
Information
Rating
Data
Mechanical
Installation
Electrical
Installation
Keypad
and
Status
Quick Start
Commissioning
Operation
Programming
Diagnostics
Application
Examples
Technical
Data
Maintenance
Options
Digistart IS User Guide 59
Issue: 4 www.controltechniques.com
8.8.8 Group 7 - Set points
The Digistart IS has low and high current flags to give early warning of abnormal operation.
No
Function
Range
Default
7A
Low Current Flag
1% to 100% FLC
50%
7B
High Current Flag
50% to 600% FLC
100%
The current flags can be configured to indicate an abnormal current level during operation, outside the normal operating level. The
flags can signal the situation to external equipment via one of the programmable outputs. The flags clear when the current returns
within the normal operating range by 10% of the programmed motor full load current.
No
Function
Range
Default
7C
Motor Temperature Flag
0% to 160%
80%
Sets the level at which the motor temperature flag operates, as a percentage of the motor's thermal capacity.
No
Function
Range
Default
7D
Mains Reference Voltage
100 V to 690 V
400 V
Sets the nominal mains voltage for the keypad's monitoring functions. This is used to calculate motor kilowatts and kilovolt amperes
(kVA) but does not affect the Digistart IS's motor control or protection.
8.8.9 Group 8 - Analog I/O
The Digistart IS has one analog output (terminals AO1, 0V).
If required, a second analog output and an analog input are available on the input/output expansion card.
No
Function
Range
Default
8A
Analog Input Trip
Do Not Trip, Trip High, Trip Low
Do Not Trip
Selects the soft starter's response to the analog input signal. The soft starter can be configured to trip if the voltage measured at the
analog input falls below or rises above the level set in Pr 8C Analog Trip Point (as a percentage of the maximum value of Pr 8B
Analog Input Scale).
No
Function
Range
Default
8B
Analog Input Scale
0-10, 2-10 V
2-10 V
Selects the scale of the analog input.
No
Function
Range
Default
8C
Analog Trip Point
0 to 100%
50%
Sets the signal level at which an analog input trip will occur, as a percentage of the maximum signal on the input.
NOTE
The analog input is only available if the input/output expansion card is installed.
No
Function
Range
Default
8D
Analog Output A
Current (%FLC), Motor Temp (%), Motor kW
(%), Motor kVA (%), Motor pf
Current (%FLC)
Selects which information will be reported via the analog output.
Current (% FLC)
Current as a percentage of motor full load current.
Motor Temp (%)
Motor temperature as a percentage of the motor service factor
(calculated by the soft starter's thermal model).
Motor kW (%)
Motor kilowatts. 100% is motor FLC (Pr 1A) multiplied by line voltage
(reference voltage parameter 7D). Power factor is assumed to be 1.0.
3 . V . I
FLC
. pf
1000
Motor kVA (%)
Motor kilovolt amperes. 100% is motor FLC (Pr 1A) multiplied by line
voltage (reference voltage parameter 7D).
3 . V . I
FLC
1000
Motor pf
Motor power factor, measured by the soft starter.
No
Function
Range
Default
8E
Analog A Scale
0-20, 4-20 mA
4-20 mA
Selects the range of the analog output.
No
Function
Range
Default
8F
Analog A Maximum Adjustment
0 to 600%
100%
8G
Analog A Minimum Adjustment
0%
Calibrates the analog output to match the signal measured on an external current measuring device.