Automatic Energy-Saving Operation Function; Commercial Switching (Cs) - Omron MX2 Series User Manual

7 Other Functions

7-5-13 Automatic Energy-saving Operation Function

This function automatically adjusts the inverter output power during constant speed operation to the
minimum level. It is suitable for fan, pump, or other load that reduced torque characteristics.
To perform energy-saving operation using this function, set the Operation Mode Selection (A085) to 01
(Energy-saving operation).
You can adjust the response and accuracy of the function in the Energy-saving Response/Accuracy
Adjustment (A086).
Because this function controls the output power to the minimum necessary level, the motor may stall if
the rapid load fluctuation, such as impact load, occurs, which may result in an overcurrent trip.
The automatic energy-saving operation function may not work sufficiently when the frequency refer-
ence source is set to Control circuit terminal block (Analog input). In this case, set the Analog Input Fil-
ter (A016) to 31 (500 ms).
Parameter
No.
Operation Mode
A085
Selection
Parameter
No.
Energy-saving
A086 Response/Accuracy
Adjustment

7-5-14 Commercial Switching (CS)

Use this function to drive a system subject to a large load inertia moment during acceleration and
deceleration with the inverter and during constant speed operation with a commercial power supply,
respectively.
Allocate the Multi-function Input S1 to S7 Selection (C001 to C007) to 14 (CS).
Parameter
No.
Multi-function Input S1
C001 to
C007
to S7 Selection
Related functions
Switching from Inverter Operation to Commercial Power Supply Operation
Follow the sequence diagram given below to switch among the terminals MC1 to MC3, FW, and CS.
When the terminal CS turns ON, the inverter shuts off its output and the motor falls in a free-run state.
Switching from Commercial Power Supply Operation to Inverter Operation
Follow the sequence diagram given below to switch among the terminals MC1 to MC3 and, with the
RUN command and CS input ON, turn the terminal CS from ON to OFF. Then, when the Restart
Standby Time (b003) elapses, the inverter starts accelerating with its frequency matched with the motor
rotation speed during free run ("frequency matching restart"). However, the inverter may restart at 0 Hz
in any of the following cases:
• The motor rotation speed is equal to or lower than 1/2 of the base frequency.
• The motor induction voltage decays quickly and the motor rotation speed cannot be detected.
• The motor rotation speed drops to the Frequency Matching Lower Limit Frequency (b007) or lower.
7 - 50
Function name
00: Normal operation
01: Energy-saving operation
Function name
0.0 to 100.0
(Response: Slow to Fast)
(Accuracy: High to Low)
Function name
14: CS (Commercial switching)
b003, b007
Data
Data
Data
Multi-function Compact Inverter 3G3MX2-V1 User's Manual (I585-E1)
Default
Unit
data
−
00
Default
Unit
data
50.0 %
Default
Unit
data
− −