MITSUBISHI ELECTRIC 700 Series - Manual (Page 82)

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.