38
Operation Description
(1) With terminal S1 closed, the larger value (absolute value) between parameters E1-09 (Min Output Freq) and b1-02
(Zero Speed Level) will be input to terminal A1 (Speed Cmd Input). That input will be seen as a Run Command, and
the operations discussed in 6.1.1 "Start Sequence" will be executed. When the signal to terminal A1 is positive, it is
seen as a forward command, and reverse when negative.
Note: Use with terminal S2 always open. If terminal S2 is closed, then the motor will rotate in the opposite direction
from the description above.
(2) If a signal smaller than the absolute value of the E1-09 or b1-02 is input to terminal A1, then Run Command relay
will open after 100ms, and the operations described in 6.1.2 "Stop Sequence" will be executed.
Note: If the Speed Command Input (terminal A1) changes slightly, the drive will continue to run until the Run
Command opens after the Brake Release Command opens, using the la rger of either FRF (S1-01) or FHF
(S1-12) when rotating forward, or the larger of either FRR (S1-02) or FHR (S1 -13) when rotating in reverse as
the Speed Reference.
As the drive will continue to run even after the brake has clamped shut, set the Speed Command Input for A1
to zero until just before 100ms, where the output frequency reaches the Brake Release Frequency (FRF in
foward, FHR in reverse). This is one of the reasons the brake will slip.
6.1.5 Sequence Error Detection Function
If the conditions for a brake sequence fault detection arise, then the drive will undergo baseblock and trigger a fault
relay after the brake release command is opened.
Sequence Fault Table
Fault
Message
Description
Detection
Cause
Counter-Measure
SE1 Run Command Fault
Relays for both Forward and
Reverse commands are closed
at the same time.
S1-16
External Operation Sequence
Error
Check the sequence circuitry.
SE2 Brake Release Fault
Brake Release Command
(BR) is not closed after the
output frequency increases
following the input of a FWD
or REV command
S1-17
・
The motor isn ’t
properly connected.
・
Brake Release Current
or Torque is set too high.
・
Check the circuitry for the
motor
・
Lower the parameter setting
value so that it is appropriate for the
load.
SE3 Brake Answer Fault 1
The Brake Release Answer
back signal is open while the
Brake Release Command
(BR) relay is closed.
S1-18
・
Sequence error in the
brake circuit.
・
The response (scan) of
the sequence circuit is too
slow/late.
Check the sequence circuitry.
SE4 Brake Answer Fault 2
The Brake Release Command
(BR) relay is open, and the
Brake Release Answer back
signal (BX) is closed.
S1-19
There is a bad connection
between the relay, contactor,
or brake (perhaps loose
wiring).
Check the relay or contactor, the
brake itself and the wiring.
Note: The following settings will keep the sequence errors described above from being not detected:
It is recommended that the sequence error detection function must be used and the drive is setup properly:
1. If the Brake Release Answer back signal is not set up to Multi-Function input, then SE3 and SE4 will not be
detected.
2. If a detection time in S1-16~19 is set to 0.00, then that sequence fault will not be detected.
Summary of Contents for CIMR-F7Z
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