Mitsubishi Electric FR - F700 Programming Manual page 91

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
LS2
Input circuit (external devices)
(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.
When no external devices are connected to the control input terminals, "X" can be
used as the internal relay "M".
84
X0
X1
Fig 3.11 Concept of Inputs (X)
Fig 3.12 Use of Contacts in Input (X) Program
X0
X1
Program
Sequence
function