Description of devices

(1)Inputs X

(a)Inputs are designed to give commands and data from external devices, such as pushbuttons, select switches, limit switches and digital switches, to the inverter (built-in PLC function).

(b)On the assumption that the PLC function contains a virtual relay Xn for one input point, the normally open (N/O) or normally closed (N/C) contact of that Xn is used in the program.

Virtual relay

PB1

X0

LS2

X1

Input circuit (external devices)

X0

X1

Program

Sequence function

Fig 3.11 Concept of Inputs (X)

(c)There are no restrictions on the number of N/O and N/C contacts of Xn used in the program.

No restrictions on the number of used contacts.

Fig 3.12 Use of Contacts in Input (X) Program

When no external devices are connected to the control input terminals, "X" can be used as the internal relay "M".

SEQUENCE PROGRAMMING

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Mitsubishi Electronics FR-A700, 700 Series specifications Inputs