Controlled Stop At Power Loss; Parameter List; Parameter Group D: Monitors - Omron 3G3MX2 Quick Start Manual

PARAMETER LIST

3.23 Controlled stop at power loss

This function is intended to achieve a controlled stop and avoid free-running of the motor when power is lost during run mode.
Inverter controls the internal DC bus voltage while decelerating the motor using the regenerative energy to keep the DC bus at a
level that allows to reduce the motor speed and avoid a long coasting time. Next diagram shows how the function works:
Power
DC bus voltage
Under-voltage
level
Output frequency
When the DC voltage of the inverter goes down to b051 level, inverter decrease the output frequency by a amount set in b054 to
force the motor to regenerate energy that is used to increase the DC bus value. After this the deceleration continue at the rate set
in b053 until the upper limit b052 is reach were the deceleration ramp stops until the DC bus drops again. This operation is repa-
ted until the motor is totally stopped or there is not enough regeneration from the motor and the DC bus goes below the under-
voltage level.
Parameter
b050 Controlled deceleration on power loss
b051 DC bus voltage trigger level of ctrl. decel.
b052 Over-voltage threshold of ctrl. decel.
b053 Deceleration time of ctrl. decel.
b054 Initial freq. drop of ctrl. decel.
4 PARAMETER LIST
The PDU (Process Data Unit) register number are addressed starting at zero. Therefore register numbered "0012h" addressed as
"0011h". Register address value (transmited on Modbus line) is 1 less than the Register number of the table

4.1 Parameter group D: Monitors

Function code
d001 (32-bits) Output frequency monitor
d002 Output current monitor
d003 Rotation direction minitoring
d004 (32-bits) Process variable (PV), PID feedback monitoring
d005 Intelligent input terminal status
d006 Intelligent output terminal status
d007 (high) Scaled output frequency monitor
d007 (low)
d008 (high) Actual-frequency monitor
d008 (low)
d009 Torque command monitor
MX2 Quick Start Guide
OFF
b052
b051
b054
b053
Parameter name
00
01
02
03
Setting of DC bus voltage to start controlled decel. operation. Range is 0.0 to 1000.0
Setting the OV-LAD stop level of controlled decel. operation. Range is 0.0 to 1000.0
Range is 0.01 to 3600.0
Setting of initial freq. drop. Range is 0.0 to 10.0 Hz
Function name
b053
Description
Trips
Decelerates to a stop
Decelerates to a stop with DC bus voltage controlled
Decelerates to a stop with DC bus voltage controlled, then restart
Monitoring and setting items
0 to 40000(100000)
0 to 65530
0: Stopping, 1: Forward rotation,
2: Reverse rotation
0 to 1000000
2^0: Terminal 1 to 2^6: Terminal 7
2^0: Terminal 11 to 2^1: Terminal 12/
2^2: Relay Terminal
0 to 4000000(10000000)
-100000 to +100000
-200 to +200
b053
Units Modbus
Register No.
0.01 [Hz] 1001h
1002h
0.01 [A] 1003h
0.1 [Hz] 1004h
0.1 1005h
1006h
1 bit 1007h
1 bit 1008h
0.01 1009h
100Ah
0.01 [Hz] 100Bh
100Ch
1 [%] 100Dh
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