Mitsubishi Electric Melsec-Q172DCPU User Manual page 90

2 SYSTEM CONFIGURATION
(4) I/O allocations
It is possible to allocate unique I/O No.s for each Motion CPU independently of
the PLC's I/O No.s. (I/O No.s are unique between the Q series PLC CPU within a
given system, but the I/O No.s of the Motion CPU are unique for each Motion
CPU.)
ON/OFF data input to the Motion CPU is handled via input devices PX
ON/OFF data output from the Motion CPU is handled via output devices PY
It is not mandatory to match the I/O device PX/PY No.s used in the Motion
program with the PLC I/O No.s; but it is recommended to make them match as
much as possible.
The following figure shows an example of I/O allocation.
0 1
QnUD QnUD Q173D
CPU CPU CPU
CPU No.1
CPU No.2 CPU No.3
(Note-1): When the number of modules to be installed is 32 points.
(Note-2): When the PX/PY No. does not match the PLC I/O No.
Refer to the Q173D(S)CPU/Q172D(S)CPU Motion Controller Programming Manual
(COMMON) about the I/O allocation setting method, and refer to the "QnUCPU User's
Manual (Function Explanation, Program Fundamentals)" about the I/O allocation
setting method of the PLC CPU.
POINT
I/O device of the Motion CPU can be set in the range PX/PY000 to PX/PYFFF.
The real I/O points must be 256 points or less. (As for the I/O No., it is possible not
to continue.)
I/O Allocations
2 3 4
QX41 QY41P
X0 to X1F Y20 to Y3F
Module of Module of
control control
CPU No.1 CPU No.1
2 - 57
5 6 7
QY41P Q172DLX QX41
Y40 to Y5F Intelligent PX0 to PX1F
32 points
(60 to 7F)
(X80 to X9F)
Module of Module of Module of
control control control
CPU No.2 CPU No.3 CPU No.3
, while
.
8 9
QY41P QY41P
PY20 to PY3F YC0 to YDF
(YA0 to YBF)
Module of Module of
control control
CPU No.3 CPU No.1