Omron MX2 - Commercial Power Source Switchover

183
Using Intelligent Input Terminals Section 4-5
mand per this example (or applying a reset). Then the Run command can turn
ON again and start the inverter output.
4-5-6 Commercial power source switchover
The commercial power source switching function allows you to switch the
power supply (between the inverter and commercial power supply) to your
system of which the load causes a considerable moment of inertia. You can
use the inverter to accelerate and decelerate the motor in the system and the
commercial power supply to drive the motor for constant speed operation.
To use this function, assign parameter "
14 (CS)" to one of the intelligent input
terminal [1] to [7] (
C001 to C007). When the CS is turned OFF with an operation
command is being given, the inverter waits for the retry wait time before motor
starts (
b003), adjusts the output frequency to the speed of the free-running
motor, and then accelerates the motor with the adjusted frequency.
Mechanically interlock the MC3 and MC2 contacts with each other. Otherwise
you may damage the drive.
If the earth leakage
breaker (ELB) trips
because of a ground
fault, the commercial
power will be disabled.
Therefore, contact a
backup power supply
from the commercial
power line circuit
(ELBC) to your sys-
tem if needed.
Option
Code
Terminal
Symbol
Function
Name
State Description
13 USP Unattended
Start
Protection
ON On powerup, the inverter will not
resume a Run command
OFF On powerup, the inverter will
resume a Run command that was
active before power loss
Valid for inputs: C001~C007
Required settings: (none)
Notes:
• Note that when a USP error occurs and it is canceled by a reset from a [RS] termi-
nal input, the inverter restarts running immediately.
• Even when the trip state is canceled by turning the terminal [RS] ON and OFF after
an under voltage protection E09 occurs, the USP function will be performed.
• When the running command is active immediately after the power is turned ON, a
USP error will occur. When this function is used, wait for at least 3 seconds after
the powerup to generate a Run command.
Inverter output frequency
0
t
Inverter power supply
1
0
Alarm output terminal
1
0
[USP] terminal
1
0
Run command [FW,RV]
1
0
Events:
Alarm
cleared
Run
command
E13
MC3
THRY
Moto r
MC1
MC2
ELBC
NFB
R
S
T
U
V
W
FW
RV
CS
L
FW Y
RVY
CSY
MX2