EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

• Inverter running -- RUN (Function code data = 0)
Inverter output on -- RUN2 (Function code data = 35)
These output signals tell the external equipment that the inverter is running at a starting frequency or higher.
If assigned in negative logic (Active OFF), these signals can be used to tell the "Inverter being stopped" state.
Output signal Basic function Remarks
RUN
RUN2
These signals come ON when the inverter is
running.
Under V/f control:
These signals come ON if the inverter output
frequency exceeds the starting frequency, and go
OFF if it drops below the stop frequency. The RUN
signal can also be used as a "Speed valid" signal
DNZS.
Goes OFF even during DC braking
or dew condensation prevention.
Comes ON even during DC
braking, pre-exciting, zero speed
control, or dew condensation
prevention.
Under vector control, both RUN and RUN2 come ON when zero speed control or servo-lock function is enabled.
• Undervoltage detected (Inverter stopped) -- LU (Function code data = 3)
This output signal comes ON when the DC link bus voltage of the inverter drops below the specified undervoltage
level, and it goes OFF when the voltage exceeds the level.
This signal is ON also when the undervoltage protective function is activated so that the motor is in an abnormal
stop state (e.g., tripped).
When this signal is ON, a run command is disabled if given.
• Torque polarity detected -- B/D (Function code data = 4)
The inverter issues the driving or braking polarity signal to this digital output judging from the internally calculated
torque or torque command. This signal goes OFF when the detected torque is a driving one, and it goes ON when
it is a braking one.
• Inverter output limiting -- IOL (Function code data = 5)
Inverter output limiting with delay -- IOL2 (Function code data = 22)
The output signal IOL comes ON when the inverter is limiting the output frequency by activating any of the
following actions (minimum width of the output signal: 100 ms). The output signal IOL2 comes ON when any of the
following output limiting operation continues for 20 ms or more.
• Torque limiting (F40, F41, E16 and E17, Maximum internal value)
• Current limiting by software (F43 and F44)
• Instantaneous overcurrent limiting by hardware (H12 = 1)
• Automatic deceleration (Anti-regenerative control) (H69)
When the IOL signal is ON, it may mean that the output frequency may have deviated from the frequency
specified by the frequency command because of this limiting function.
• Keypad operation enabled -- KP (Function code data = 8)
This output signal comes ON when the keypad is specified as a run command source.
• Inverter ready to run -- RDY (Function code data = 10)
This output signal comes ON when the inverter becomes ready to run by completing hardware preparation (such
as initial charging of DC link bus capacitors and initialization of the control circuit) and no protective functions are
activated.
• Select AX terminal function -- AX (Function code data = 15)
In response to a run command FWD, this output signal controls the magnetic contactor on the commercial-power
supply side. It comes ON when the inverter receives a run command and it goes OFF after the motor decelerates
to stop with a stop command received.
This signal immediately goes OFF upon receipt of a coast-to-stop command or when an alarm occurs.
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