Hitachi SJ7002 Series Instruction Manual page 222

Inverter Ready
Signal
Opt. Code
[IRDY]
Symbol
[11 to [15],
Valid for
[ALx]
Outputs
Required
Settings
Default
Requires
terminals config.
Forward/Reverse
Rotation Signals
51=[FWR]
Opt. Code
and
52=[RVR]
Symbol
[11 to [15],
Valid for
[ALx]
Ouputs
Required
Settings
Default
Requires
terminal config.
Major Failure
Signal
Opt. Code
[MJA]
Symbol
[11 to [15],
Valid for
[ALx]
Outputs
Required
Settings
Default
Requires
config.
terminals
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The inverter turns ON the Inverter Ready Signal [IRDY] output when it is ready to receive an
operation command such as Run Forward, Run Reverse, or Jog. Otherwise, [IRDY] will be
OFF and the inverter cannot accept operation commands. If [IRDY] is OFF, then check the
input power supply voltage at the [R], [S], and [T] terminals to be sure the voltage is within the
50
input specification range. The [IRDY] output is OFF when the input power is provided only to
the control power supply,
none
The Forward Rotation Signal [FWR] is ON only when the inverter is driving the motor in the
foward direction. Similarly, the Reverse Rotation Signal [RVR] is ON only when the inverter is
driving the motor in the reverse direction. Both signals are OFF when the motor is stopped.
Output frequency (Hz)
none
Forward Rotation Signal [FWR]
Reverse Rotation Signal [RVR]
The Major Failure Signal [MJA] indicates that a particular type of error event has occurred,
resulting in an inverter trip. In addition to causing the normal trip alarm, the following error
events also will turn ON the [MJA] output, when assigned to an intelligent output terminal.
53
Error
Code
E 10
CT (current transformer) error
E 1 1
CPU error
none
E 14
Ground fault
E20
Inverter thermal trip with low fan speed
E23
Gate array error
E25
Main circuit error
0
Name
4–61
SJ700 Inverter
2
t
t
t