Instruction manual
Table Of Contents
- Preface
- Safety Precautions
- Table of Contents
- Warnings, Cautions and Conformity
- Chapter 1 Drive Model Identification
- Chapter 2 Mounting and Wiring the Inverter
- Chapter 3 Operation using the Keypad
- Chapter 4 Function Codes / Parameters
- Chapter 5 Check Motor Rotation and Direction
- Chapter 6 Speed Reference Command Configuration
- Chapter 7 Operation Method Configuration (Run / Stop)
- Chapter 8 Motor and Application Specific Settings
- Chapter 9 Using PID Control for Constant Flow / Pressure Applications
- Chapter 10 Troubleshooting
- 10.1 Protective Functions
- 10.2 Before Proceeding with Troubleshooting
- 10.3 If Neither an Alarm Code Nor "Light Alarm" Indication Appears on the LED Monitor
- 10.4 If an Alarm Code Appears on the LED
- 10.5 If the “Light Alarm” Indication Appears on the LED Monitor
- 10.6 If an Abnormal Pattern Appears on the LED Monitor except Alarm Codes and "Light Alarm" Indication
- 10.7 If the Inverter is Running on Single-Phase Power
- Chapter 11 Specifications
4-82
Switching from commercial-power operation to inverter operation ISW50/ISW60: OFF ON
(1) The inverter primary circuit SW52-1 is turned ON immediately.
(2) The commercial power circuit SW88 is turned OFF immediately.
(3) After an elapse of t2 (0.2 sec + time required for the main circuit to get ready) from when SW52-1 is turned ON,
the inverter secondary circuit SW52-2 is turned ON.
(4) After an elapse of t3 (0.2 sec + time specified by H13) from when SW52-2 is turned ON, the inverter
synchronizes once the motor that has been freed from the commercial power to the commercial power
frequency. Then the motor returns to the operation driven by the inverter.
t1: 0.2 sec + Time specified by H13 (Restart mode after momentary power failure)
t2: 0.2 sec + Time required for the main circuit to get ready
t3: 0.2 sec + Time specified by H13 (Restart mode after momentary power failure)
Selection of Commercial Power Switching Sequence
J22 specifies whether or not to automatically switch to commercial-power operation when an inverter alarm
occurs.
Data for J22
Sequence (upon occurrence of an alarm)
0
Keep inverter-operation (Stop due to alarm.)
1
Automatically switch to commercial-power operation
• The sequence operates normally also even when SW52-1 is not used and the main power of the
inverter is supplied at all times.
• Using SW52-1 requires connecting the input terminals [R0] and [T0] for an auxiliary control power.
Without the connection, turning SW52-1 OFF loses also the control power.
• The sequence operates normally even if an alarm occurs in the inverter except when the inverter itself
is broken. Therefore, for a critical facility, be sure to install an emergency switching circuit outside the
inverter.
• Turning ON both the magnetic contactor MC (88) at the commercial-power side and the MC (52-2) at
the inverter output side at the same time supplies main power mistakenly from the output (secondary)
side of the inverter, which may damage the inverter. To prevent it, be sure to set up an interlocking logic
outside the inverter.