reasons, with the
PID-CTL signal being ON. As long as the PID-CTL signal is ON, PID control is effective,
so the inverter may abruptly resume its operation, depending on the feedback value in PID control.
When PID control is enabled, even if the inverter stops its output during operation because of sensor signals or other
reasons, operation will resume automatically. Design your machinery so that safety is ensured even in such cases.
Otherwise, an accident could occur.
Running forward -- FRUN (Function code data = 52)
Running reverse --
RRUN (Function code data = 53)
Output signal Assigned data Running forward Running reverse Inverter stopped
FRUN 52 ON OFF OFF
RRUN 53 OFF ON OFF
In remote operation -- RMT (Function code data = 54)
This output signal comes ON when the inverter switches from local to remote mode.
For details of switching between remote and local modes, refer to Chapter 4, Section 4.2.2 "Remote and local
modes."
Terminal [C1] wire break -- C1OFF (Function code data = 59)
This output signal comes ON when the inverter detects that the input current to terminal [C1] drops below 2 mA
interpreting it as the terminal [C1] wire broken.
Speed valid -- DNZS (Function code data = 70)
This output signal comes ON when the reference speed or detected one exceeds the stop frequency specified by
function code F25. It goes OFF when the speed is below the stop frequency for 100 ms or longer. Under vector control
with speed sensor, F38 switches the decision criteria between the reference speed and detected one. Under vector
control without speed sensor, the reference speed is used as a decision criteria. (
Refer to the descriptions of F25 and
F38.)
Alarm output (for any alarm) -- ALM (Function code data = 99)
This output signal comes ON if any of the protective functions is activated and the inverter enters Alarm mode.
Braking transistor broken -- DBAL (Function code data = 105)
If the inverter detects a breakdown of the braking transistor, it issues the braking transistor alarm (
dba
) and also the
output signal
DBAL. Detection of braking transistor broken can be cancelled by H98.
(200 V class series/ 400 V class series, 22 kW or below) (
Refer to the description of H98.)
Breakdown of the braking transistor could lead to the secondary breakdown of the braking resistor and
inverter’s internal units. Use this output signal
DBAL to detect abnormal operation of the built-in braking
transistor and to cut off power to the magnetic contactor in inverter primary circuits, for preventing spread of
the damage.
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