Specifications
21
MITSUBISHI ELECTRIC
FR-E 500 EC
Sample Applications
Multi-speed operation
(with Mitsubishi PLC)
Thefigureontherightshowsthelayoutof
a sample circuit for multi-speed operation
with a Mitsubishi PLC. The PLC is equipped
with a digital output module AY80.
To prevent wrap-arounds, the output
modules common pin 10 for preventing
wrap-arounds must be connected to
inverter terminal SD.
A variety of functions for the inverters
transistor output signals (RH, RM, STOP
etc.) are selectable using parameter 180 to
183. These inverter output signals, how
-
ever, can be received at a separate digital
input module.
Up to 15 speeds can be set with the
multi-speed setter, but additional two
speeds can be obtained by shorting termi
-
nals 10 and 2 for an upper limit frequency
setting (Pr. 1) and terminals 2 and 5 for a
lower limit frequency setting (Pr. 2).
Automatic operation using DC
(0/4–20 mA) current signals
Thefigureontherightshowsthelayoutof
a circuit for operation in combination with
a temperature sensor for air-conditioners.
The motor can be switched from inverter
operation to commercial power supply
operation and vice versa. The operating
mode can be determined by a switch. To
switch from commercial power supply
operation to inverter operation, the motor
has to be stopped first.
Operation automatically switches to com
-
mercial power supply operation when an
alarm stop occurs in the inverter.
Assign the AU signal to the RM terminal to
switch between an external current signal
and a manual voltage signal from the
speed setter potentiometer.
Parameter 75 should be set so that the in
-
verter can only be reset after a protective
function has been activated.
Relevant parameters:
Pr. 75 “Reset selection” and Pr. 180 to
Pr. 183 “Input terminal function selection”
L1
A
B
10
4
STF
RM
PC
C
2
5
R
J
CR1
RT
CR3
MC1
MC1
MC2
CR2
CR2
CR1
MC2
MC1
MC2
MC2
STOP
24 V
RT CR3
CR3
OCR
L2
L3
I
I
I
M
U
V
W
PC
RES
J
I
1
STF
STR
RH
RM
RL
6
RUN
FU
SE
B
C
24VDC
MRS
RES
PC
SD
2
3
4
5
6
7
9
10
24 VDC
L1
L2
L3
I
I
I
M
U
V
W
APPLICATIONS