Mitsubishi Electric FR-A800, Instruction Manual

Page: 655 / 1042

Parameters (A) Application parameters
FR-A800 5 - 475
,
The RES signal can be used for reset input acceptance with Pr. 75 "Reset selection/disconnected
PU detection/PU stop selection". When RES signal and another input signal are simultaneously
input, the MC operation by the RES signal has a higher priority.
$
MC1 turns OFF at an inverter fault.
%
When Pr. 138 ="0 (electronic bypass invalid at a fault)", MC2 is OFF. When Pr. 138 ="1 (electronic
bypass valid at a fault)", MC2 is ON.
&
MC operation
 : MC-ON
×: MC-OFF
⎯
: During inverter operation, MC2-OFF, MC3-ON
During commercial power supply operation, MC2-ON, MC3-OFF
Invariance: The status before changing the signal ON or OFF is held.
●
The output signals are as shown below.
Electronic bypass operation sequence
●
Example of operation sequence without automatic bypass sequence (Pr. 139 = "9999")
Signal
Applied terminal
(Pr. 190 to Pr. 196 setting)
Description
MC1 17
Operation output signal of the magnetic contactor MC1 on the
inverter's input side.
MC2 18
Operation output signal of the magnetic contactor MC2 for the
commercial power supply operation.
MC3 19
Operation output signal of the magnetic contactor MC3 on the
inverter's output side.
Tab. 5-200: Output signals
I002669E
Fig. 5-222: Signal timing when there is no automatic switchover sequence
Inverter run command
(STF)
Power supply
Operation interlock
(MRS)
Inverter/commercial
power supply (CS)
Inverter input side MC
(MC1)
Inverter output side MC
(MC3)
MC for commercial
power supply operation
(MC2)
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Each timer
Operating status
(motor speed)
INV
operation
Coasting Bypass
operation
Coasting INV
operation
Stop
Pr. 57
Pr. 137
Pr. 58
Pr. 136
Pr. 136
Pr. 57
Off only at inverter alarm
ON : Operation enabled
OFF: Operation disabled
ON : Forward rotation
OFF: Stop
ON : Inverter operation
OFF: Commercial power supply operation
Indicates the delay time until
the MC turns on (off ).
Pr. 136 MC switchover interlock time
Pr. 137 MC3 start (waiting time)
Pr. 57 Reset time
Pr. 58 Switchover cushion time