Omron VARISPEED E7 User Manual page 256

Display Meaning
MEMOBUS Communications
Error
A normal receive was not possible
for 2 s or longer after control data
were received once.
Option Communications Error
A communications error was
detected during a run command or
while setting a frequency reference
from a Communications Option
Card.
Digital Operator Communications
Error 1
Communications with the Digital
Operator were not established
within 5 seconds after the power
was turned on.
CPU External RAM Fault
Digital Operator Communications
Error 2
After communications were estab-
lished, there was a communica-
tions error with the Digital
Operator for more than 2 seconds.
Baseblock circuit error
EEPROM error
CPU internal A/D converter error
CPU external A/D converter error
Option Card connection error
ASIC internal RAM fault
Watchdog timer fault
CPU-ASIC mutual diagnosis fault
ASIC version fault
Probable Causes
–
–
The Digital Operator's connector isn't
connected properly.
The Inverter's control circuits are
faulty.
–
The control circuits were destroyed.
The Digital Operator isn't connected
properly.
The Inverter's control circuits are
faulty.
–
The control circuit is damaged.
–
The control circuit is damaged.
–
The control circuit is damaged.
-
The control circuit is damaged.
The Option Card is not connected
properly.
The Inverter or Option Card is faulty.
-
The control circuit is damaged.
-
The control circuit is damaged.
-
The control circuit is damaged.
The Inverter control circuit is faulty
Corrective Actions
Check the communications
devices and communications sig-
nals.
Check the communications
devices and communications sig-
nals.
Disconnect the Digital Operator
and then connect it again.
Replace the Inverter.
Try turning the power supply off
and on again.
Replace the Inverter.
Disconnect the Digital Operator
and then connect it again.
Replace the Inverter.
Try turning the power supply off
and on again.
Replace the Inverter.
Try turning the power supply off
and on again.
Replace the Inverter.
Try turning the power supply off
and on again.
Replace the Inverter.
Try turning the power supply off
and on again.
Replace the Inverter.
Turn off the power and insert the
Card again.
Replace the Option Card or the
Inverter.
Try turning the power supply off
and on again.
Replace the Inverter.
Try turning the power supply off
and on again.
Replace the Inverter.
Try turning the power supply off
and on again.
Replace the Inverter.
Replace the Inverter.
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