SPEECON 7300PA series, Instruction Manual, Page: 117 / 139

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115
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B.) Warning and Self-Diagnosis Functions
Protection function Explanation
LCD display
(English)
Low-voltage protection
main circuit voltage
insufficient
Monitor display appears if low voltage protection conditions such as a drop
in main circuit voltage or momentary power loss occur while the inverter
output is off. (blinking)
Alarm (UV)*
1
DC Volt. Low
High voltage protection
Monitor display appears when the main circuit DC voltage rises above the
detection level while the inverter output is off.
(blinking)
Alarm (OV)*
1
Over Voltage
Cooling fin overheat warning
Monitor display appears when a separate thermal protector contact is input
to the external terminal. (Sn-15 ~ 18 = OB)
(blinking)
Alarm (OH2)*
1
Over Heat
Overtorque detection
This function is used to protect the machine and to monitor the inverter
output torque. The inverter output reacts in a preset manner when the
inverter output current exceeds the over torque detection level. The
monitor display blinks when “operation continue” is preset.
(blinking)
Alarm (OL3)*
1
Over Torque
During
acceleration
Inverter acceleration is stopped when 150% of or more of the inverter rated
current is required by the load. This prevents overload protection (OL2) or
overcurrent (OC) from occurring. When current is reduced to less than
170%, acceleration is enabled.
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During
normal
operation
Output frequency is decreased when 130% of the inverter rated current or
greater is required by the load. This prevents motor and inverter overload
(OL1, OL2). When current is reduced below 130%, inverter acceleration is
than enabled.
－
Stall prevention
Accel/decel is
accomplished
with maximum
capacity of the
inverter without
tripping on
over-current or
overvoltage a
During
deceleration
Deceleration is stopped when the DC voltage is caused to rise by motor
regenerative energy. This prevents overvoltage trips (OV). When DC
voltage decreases, deceleration to the set value then resumes
－
Simultaneous normal and
reverse rotation commands
When forward and reverse rotation commands are simultaneously
detected for a period of time exceeding 500 ms, the inverter is stopped
according to the preset stop method. (blinking)
Alarm (EF)*
1
Input Error
Terminal
○ 3
(blinking)
Alarm (EF3)*
1
External Fault 3
Terminal
○ 5
(blinking)
Alarm (EF5)*
1
External Fault 5
Terminal
○ 6
(blinking)
Alarm (EF6)*
1
External Fault 6
Terminal
○ 7
(blinking)
Alarm (EF7)*
1
External Fault 7
External Fault
Signal Input
(Minor fault)
Terminal
○ 8
It is indicated on the monitor when the mode after external signal input is
set to "Operation continue."
Ref. to the external faults
○ 5
~
○ 8
setting on page 87
Minor fault setting
－
terminal
○
3
(Sn-12=11XX)
terminal
○
5
(Sn-15=2C)
terminal
○ 6
(Sn-16=3C)
terminal
○ 7
(Sn-17=4C)
terminal
○
8
(Sn-18=5C)
(blinking)
Alarm (EF8)*
1
External Fault 8
Operator transmission fault 1
(Initial fault) Alarm (CPF00)*
1
OP comm. Error 1
Digital Operator
communication error
Operator transmission fault 2
(on lime fault) Alarm (CPF01)*
1
OP comm. Error 2