Mitsubishi Electric FR-E710W-0.1K, Инструкция по эксплуатации

Страница: 293 / 349

293
5
TR
O
U
BLE
S
HOOTING
Causes and corrective actions
(2) Warnings
When a warning occurs, the output is not shut off.
Operation panel
indication
Er4
Name Mode designation error
Description
Appears if a parameter setting is attempted in the External or NET operation mode with Pr. 77
≠
"2".
Appears if a parameter setting is attempted when the command source is not at the operation panel.
Check point
Check that operation mode is PU operation mode.
Check the
Pr. 77 setting. (Refer to page 187).
Check if FR Configurator (USB connector) or a parameter unit (FR-PU04/FR-PU07) is connected when Pr. 551 =
"9999 (initial setting)."
Check the
Pr.551 setting.
Corrective action
After setting the operation mode to the "PU operation mode", make parameter setting. (Refer to page 194)
After setting Pr. 77 = "2", make parameter setting.
Disconnect FR Configurator (USB connector) or the parameter unit (FR-PU04/FR-PU07), and make parameter
setting.
After setting
Pr. 551 = "4", make parameter setting. ( Refer to page 205 )
Operation panel
indication
Err.
Name
Inverter reset
Description
Executing reset using RES signal, or reset command from communication or PU
Displays at powering OFF.
Corrective action Turn OFF the reset command
Operation panel
indication
OL
FR-PU04
FR-PU07
OL
Name Stall prevention (overcurrent)
Description
During
acceleration
When the output current (output torque when Pr. 277 Stall prevention current switchover = "1") of the
inverter exceeds the stall prevention operation level ( Pr. 22 Stall prevention operation level , etc.), this
function stops the increase in frequency until the overload current decreases to prevent the inverter
from resulting in overcurrent trip. When the overload current has reduced below stall prevention
operation level, this function increases the frequency again.
During
constant-
speed
operation
When the output current (output torque when Pr. 277 Stall prevention current switchover = "1") of the
inverter exceeds the stall prevention operation level ( Pr. 22 Stall prevention operation level , etc.), this
function reduces frequency until the overload current decreases to prevent the inverter from resulting
in overcurrent trip. When the overload current has reduced below stall prevention operation level, this
function increases the frequency up to the set value.
During
deceleration
When the output current (output torque when
Pr. 277 Stall prevention current switchover
= "1") of the
inverter exceeds the stall prevention operation level ( Pr. 22 Stall prevention operation level , etc.), this
function stops the decrease in frequency until the overload current decreases to prevent the inverter
from resulting in overcurrent trip. When the overload current has decreased below stall prevention
operation level, this function decreases the frequency again.
Check point
Check that the Pr. 0 Torque boost setting is not too large.
Check that the Pr. 7 Acceleration time and Pr. 8 Deceleration time settings are not too small.
Check that the load is not too heavy.
Are there any failure in peripheral devices?
Check that the
Pr. 13 Starting frequency is not too large.
Check that the Pr. 22 Stall prevention operation level is appropriate
Corrective action
Increase or decrease the
Pr. 0 Torque boost
setting 1% by 1% and check the motor status.
(Refer to page 85)
Set a larger value in Pr. 7 Acceleration time and Pr. 8 Deceleration time . (Refer to page 109)
Reduce the load weight.
Try Advanced magnetic flux vector control and General-purpose magnetic flux vector control.
Change the
Pr. 14 Load pattern selection
setting.
Set stall prevention operation current in Pr. 22 Stall prevention operation level . (The initial value is 150%.) The
acceleration/deceleration time may change. Increase the stall prevention operation level with
Pr. 22 Stall prevention
operation level , or disable stall prevention with Pr. 156 Stall prevention operation selection . (Operation at OL
occurrence can be selected using
Pr. 156
.)