Mitsubishi FR-A721-11K Instruction Manual page 29

Control circuit specifications
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
*2 Refer to Chapter 4 of
(3) Communication
Terminal Terminal
Symbol Name
PU
- - -- -- - -- -- -- - -- -- - -
connector
Inverter
TXD+
transmission
TXD-
terminal
Inverter
RXD+
reception
RXD-
terminal
SG Earth (Ground)
USB
- - -- -- - -- -- -- - -- -- - -
connector
22
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.
*1
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.
To set a full-scale value for monitoring
the output frequency and the output
current, set Pr. 56 and Pr.158.
the Instruction Manual (Applied).
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
. Communication speed : 4800 to 38400bps
. Overall length
With the RS-485 terminals, communication can be made through RS-485.
Conforming standard
Transmission format
Communication speed : 300 to 38400bps
Overall length
The 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)
Description
*1
*1
Alarm code (4bit)
*1
output
*1
Output item:
Output frequency
(initial setting)
Signals can be output
from the open
collector terminals by
setting Pr. 291.
Output item:
Output frequency
*2
(initial setting)
Description
: Multidrop link
: 500m
: EIA-485 (RS-485)
: Multidrop link
: 500m
Rated Refer to
Specifications page
*2
Permissible load
24VDC (27VDC
*2
maximum) 0.1A
(A voltage drop is
2.8V maximum
when the signal is
on.)
*2
*1 Low is when the
open collector
output transistor is
ON (conducts).
*2
High is when the
transistor is OFF
(does not
conduct).
*2
-- -- - -- -- -- - -- -- -- - - - -- --
Permissible load
current 2mA
*2
1440pulses/s at
60Hz
Maximum output
pulse: 50kpulses/s
*2
Permissible load
current : 80mA
Output signal 0 to
10VDC
Permissible load
current 1mA *2
(load impedance
10kΩ or more)
Resolution 8 bit
Refer to
page
26
26
27