Mitsubishi Electric FR-A720-0.4K Instruction Manual page 28

Terminal Terminal
Symbol Name
Inverter
RUN
running
Up to
SU
frequency
Overload
OL
warning
Instantaneous
IPF
power failure
Frequency
FU
detection
Open collector
SE
output common
For meter
FM
NPN open
collector output
Analog signal
AM
output
* Refer to Chapter 4 of the Instruction Manual (Applied).
(3) Communication
Terminal Terminal
Symbol Name
PU
---- ------ ------ ----
connector
Inverter
TXD+
transmission
TXD-
terminal
Inverter
RXD+
reception
RXD-
terminal
SG Earth (Ground)
USB
---- ------ ------ ----
connector
Description
Switched low when the inverter output frequency is equal to or
higher than the starting frequency (initial value 0.5Hz). Switched
high during stop or DC injection brake operation.
Switched low when the output
frequency reaches within the range of
±10% (initial value) of the set frequency.
Switched high during acceleration/
deceleration and at a stop.
Switched low when stall prevention is
activated by the stall prevention
function. Switched high when stall
prevention is cancelled.
Switched low when an instantaneous
power failure and under voltage
protections are activated.
Switched low when the inverter output
frequency is equal to or higher than the
preset detected frequency and high
when less than the preset detected
frequency.
Common terminal for terminals RUN, SU, OL, IPF, FU
Select one e.g. output frequency from
monitor items. Not output during
inverter reset.
The output signal is proportional to the
magnitude of the corresponding
monitoring item.
Use Pr. 55, Pr. 56, and Pr. 866 to set full
scales for the monitored output
frequency, output current, and torque.
(Refer to page 263)
With the PU connector, communication can be made through RS-485.
(for connection on a 1:1 basis only)
. Conforming standard : EIA-485 (RS-485)
. Transmission format : Multidrop
. Communication speed : 4800 to 38400bps
. Overall length : 500m
With the RS-485 terminals, communication can be made through RS-485.
Conforming standard : EIA-485 (RS-485)
Transmission format : Multidrop link
Communication speed : 300 to 38400bps
Overall length : 500m
FR Configurator can be used by connecting the inverter to the personal computer
through USB.
Interface: Conforms to USB1.1
Transmission speed: 12Mbps
Connector: USB B connector (B receptacle)
Specifications
*
Permissible load
24VDC (27VDC
maximum) 0.1A
(A voltage drop is
2.8V maximum
when the signal is
ON.)
Low is when the
Fault code (4bit)
open collector
output
output transistor is
ON (conducts).
High is when the
transistor is OFF
(does not conduct)
Permissible load
Output item:
current 2mA
Output frequency
1440pulses/s at
(initial setting)
60Hz
signals can be output Maximum output
from the open pulse: 50kpulses/s
collector terminals by Permissible load
setting Pr. 291. current : 80mA
Output signal 0 to
10VDC
Output item:
Permissible load
Output frequency current 1mA
(load impedance
(initial setting)
10kΩ or more)
Resolution 8 bit
Description
Wiring
Rated Refer to
page
*
*
*
*
*
---- ------- ------ --- --- --
*
*
*
Refer to
page
25
26
27
21
2