Classifi-
cation
Symbol Name Functions
- Since low level analogue signals are used, these signals are especially susceptible to the external noise effects. Route the
wiring as short as possible (within 20 m) and use shielded wires. In principle, ground the shielded sheath of wires; if effects of
external inductive noises are considerable, connection to terminal [11] may be effective. As shown in Figure 3.7, ground the
single end of the shield to enhance the shield effect.
- Use a twin contact relay for low level signals if the relay is used in the control circuit. Do not connect the relay's contact to
terminal [11].
- When the inverter is connected to an external device outputting the analogue signal, a malfunction may be caused by electric
noise generated by the inverter. If this occurs, connect a ferrite core (a toroidal core or an equivalent) to the device outputting
the analogue signal and/or connect a capacitor having the good cut-off characteristics for high frequency between control
signal wires as shown in Figure 2.14.
- Do not apply a voltage of +7.5 VDC or higher to terminal [C1] when you assign the terminal [C1] to C1 function. Doing so
could damage the internal control circuit.
Analogue input
Figure 3.7 Connection of Shielded Wire Figure 3.8 Example of Electric Noise Reduction
[X1] Digital
input 1
[X2] Digital
input 2
[X3] Digital
input 3
[X4] Digital
input 4
[X5] Digital
input 5
(1) Various signals such as coast-to-stop, alarm from external equipment, and multi-frequency commands can be
assigned to terminals [X1] to [X5], [FWD] and [REV] by setting function codes E01 to E05, E98, and E99. For
details, refer to Chapter 6, Section 6.1 "Function codes tables".
(2) Input mode, i.e. SINK/SOURCE, is changeable by using the internal slide switch. (Refer to Section 3.5, "Setting
up the slide switches."
(3) Switches the logic value (1/0) for ON/OFF of the terminals [X1] to [X5], [FWD], or [REV]. If the logic value for ON
of the terminal [X1] is 1 in the normal logic system, for example, OFF is 1 in the negative logic system and vice
versa.
(4) The negative logic system never applies to the terminals assigned for FWD and REV.
[FWD] Run
forward
command
Digital Input
[REV] Run
reverse
command
(Digital input circuit specifications)
PLC
CM
6.3kΩ
SOURCE
SINK
X1～X5,
FWD,REV
DC+24V
SW1
Figure 3.9 Digital Input Circuit
Item Min. Max.
ON level 0 V 2 V
Operation
voltage
(SINK)
OFF level 22 V 27 V
ON level 22 V 27 V
Operation
voltage
(SOURCE)
OFF level 0 V 2 V
Operation current at
ON
(Input voltage is at 0
V)
2.5
mA
5 mA
Allowable leakage
current at OFF
- 0.5 mA
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