2-20
Chap. 2 MOUNTING AND WIRING THE INVERTER
Table 2.7 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Classifi-
cation
Symbol Name Functions
[PLC]
Photocoupler
[CM]
<Control circuit>
[X1] to [X7],
[FWD], [REV]
+24 VDC
Programmable
logic controller
SOURCE
SINK
[PLC]
Photocoupler
[CM]
<Control circuit>
[X1] to [X7],
[FWD], [REV]
+24 VDC
Pr o gr amma bl e
logic controller
SOURCE
SINK
(a) With the switch turned to SINK (b) With the switch turned to SOURCE
Figure 2.15 Circuit Configuration Using a PLC
For details about the slide switch setting, refer to Section 2.3.6 "Setting up the slide switches."
Digital input
For inputting a pulse train through the digital input terminal [X7]
• Inputting from a pulse generator with an open collector transistor output
Stray capacity on the wiring between the pulse generator and the inverter may disable transmission of the
pulse train. As a countermeasure against this problem, insert a pull-up resistor between the open collector
output signal (terminal [X7]) and the power source terminal (terminal [PLC]) if the switch selects the
SINK mode input; insert a pull-down resistor between the output signal and the digital common terminal
(terminal [CM]) if the switch selects the SOURCE mode input.
A recommended pull-up/down resistor is 1kΩ 2 W. Check if the pulse train is correctly transmitted
because stray capacity is significantly affected by the wire types and wiring conditions.
[FM1]
[FM2]
Analog
monitor
Both terminals output monitor signals for analog DC voltage (0 to +10 V) or analog DC
current (+4 to +20 mA). The output form (VO/IO) for each of [FM1] and [FM2] can be
switched with the slide switches on the control PCB and the function codes, as listed
below.
Output form
Terminal
Terminal function is
specified by:
Analog DC voltage Analog DC current
Content is
specified by:
Slide switch SW4 VO1 IO1
[FM1]
Function code F29 0 1
Function code
F31
Slide switch SW6 VO2 IO2
[FM2]
Function code F32 0 1
Function code
F35
The signal content can be selected from the following with function codes F31 and F35.
• Output frequency • Output current • Output voltage
• Output torque • Load factor • Input power
• PID feedback amount • Speed (PG feedback value) • DC link bus voltage
• Universal AO • Motor output • Calibration
• PID command • PID output
* Input impedance of the external device: Min. 5kΩ (at 0 to 10 VDC output)
(While the terminal is outputting 0 to 10 VDC, it is capable of driving up to two analog
voltmeters with 10 kΩ impedance.)
* Input impedance of the external device: Max. 500Ω (at 4 to 20 mA DC output)
* Adjustable range of the gain: 0 to 300%
Analog output
[11]
Analog
common
Two common terminals for analog input and output signals.
These terminals are electrically isolated from terminals [CM] and [CMY].
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