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MITSUBISHI ELECTRIC 700 Series User Manual

Page 82

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77

Description of devices

3

SEQUENCE PRO

G

RAM

M

ING

(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.

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.

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".

LS2

PB1

X0

X1

X1

X0

Virtual relay

Sequence
function

Input circuit (external devices)

Program

No restrictions
on the number
of used contacts.