Control circuit
38
INSTALLATION AND WIRING
2.6 Control circuit
2.6.1 Details on the control circuit terminals of the
inverter
The input signal function of the terminals in can be selected by setting Pr.178 to Pr.196 (I/O terminal function
selection).
For the parameter details, refer to the FR-A800 Instruction Manual (Detailed).
Input signal
Type
Terminal
symbol
Terminal name Terminal function description
Rated
specification
Contact input
STF Forward rotation start
Turn ON the STF signal to start forward
rotation and turn it OFF to stop.
When the STF and
STR signals are turned
ON simultaneously, the
stop command is given.
Input resistance
4.7 k
Voltage when
contacts are open:
21 to 27 VDC
When contacts are
short-circuited:
4 to 6 mADC
STR Reverse rotation start
Turn ON the STR signal to start reverse
rotation and turn it OFF to stop.
STOP
Start self-holding
selection
Turn ON the STOP signal to self-hold the start signal.
RH
RM
RL
Multi-speed selection
Multi-speed can be selected according to the combination of RH, RM
and RL signals.
JOG
Jog mode selection
Turn ON the JOG signal to enable JOG operation (initial setting) and
turn ON the start signal (STF or STR) to start JOG operation.
Pulse train input
Terminal JOG is also used as the pulse train input terminal. To use as
a pulse train input terminal, change the Pr.291 setting.
(maximum input pulse: 100k pulses/s)
Input resistance 2 k
When contacts are
short-circuited: 8 to 13
mADC
RT
Second function
selection
Turn ON the RT signal to enable the second function.
When the second function such as "second torque boost" and "second
V/F (base frequency)" is set, turning ON the RT signal enables the
selected function.
Input resistance
4.7 k
Voltage when
contacts are open:
21 to 27 VDC
When contacts are
short-circuited:
4 to 6 mADC
MRS
(X10)
Output stop
(Inverter operation
enable)
Connect to terminal RDA of the converter unit. When the RDA signal
is turned OFF, the inverter output is shut off.
The X10 signal (NC contact) is assigned to terminal MRS in the initial
setting. Use Pr.599 to change the specification to NO contact.
RES Reset
Use this signal to reset a fault output provided when a protective
function is activated. Turn ON the RES signal for 0.1s or longer, then
turn it OFF.
In the initial setting, reset is always enabled. By setting Pr.75, reset
can be enabled only at an inverter fault occurrence. The inverter
recovers about 1 s after the reset is released.
AU
Terminal 4 input
selection
The terminal 4 function is available only when the AU signal is ON
Turning ON the AU signal disables the terminal 2 function.
CS
Selection of
automatic restart
after instantaneous
power failure
When the CS signal is left ON, the inverter restarts automatically at
power restoration. Note that restart setting is necessary on both the
inverter and the converter unit for this operation. In the initial setting, a
restart is disabled.
SD
Contact input
common (sink)
Common terminal for contact input terminal (sink logic) and terminal
FM
———
External transistor
common (source)
Connect this terminal to the power supply common terminal of a
transistor output (open collector output) device, such as a
programmable controller, in the source logic to avoid malfunction by
undesirable current.
24 VDC power supply
common
Common terminal for the 24 VDC power supply (terminal PC, terminal
+24)
Isolated from terminals 5 and SE.
PC
External transistor
common (sink)
Connect this terminal to the power supply common terminal of a
transistor output (open collector output) device, such as a
programmable controller, in the source logic to avoid malfunction by
undesirable current.
Power supply voltage
range 19.2 to 28.8
VDC
Permissible load
current 100 mA
Contact input
common (source)
Common terminal for contact input terminal (source logic).
24 VDC power supply
common
Can be used as a 24 VDC 0.1 A power supply.
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