Mitsubishi A1SH, User Manual, Page: 49 / 186

4. AnSHCPU MODULE
4 - 9
MELSEC-A
4.1.5 List of devices
A device is any contact, coil, or timer used in PLC program operations.
AnSHCPU devices and their range of use are shown below. The items marked "*"
can be used and set for range change by setting the parameters.
Set parameters which are appropriate for the system configuration and its program.
Section 4.1.6 gives details about parameter settings.
Table 4.3 Devices
Device Application range (Number of points) Explanation
X Input
Provides a command or data from an external device,
(e.g. pushbutton, select switch, limit switch, digital switch) to the
PLC.
Y Output
Provides the program control result to an external device,
e.g. solenoid, magnetic switch, signal light, digital display.
X Input
Y Output
X/Y000 to X/Y7FF
(X, Y total 2048 points)
•
Possible to use in a program after the I/O points usage range per
each A1SJHCPU, A1SHCPU, A2SHCPU (described above) to a
maximum of 8192 points (external output is not allowed).
•
Objective is to allocate for automatic I/O refresh of
MELSECNET/MINI-S3, for remote I/O of MELSECNET/10, for
remote I/O of MELSECNET(B), or for CC-Link.
M Special relay M9000 to M9255 (256 points) Predefined internal relay for special purposes.
M Internal relay *
M0 to M999
(1000 points)
Internal relay in the PLC which cannot be directly output.
L Latch relay*
L1000 to L2047
(1048 points) Number of M + L +
S = 2048
Internal relay in the PLC which cannot be directly output.
Backed up during power failure.
S Step relay*
Can be used by
setting a parameter
(0)
Used in the same manner as an internal relay (M) e.g., as a relay
indicating the stage number of a step-by step process operation
program.
B Link relay B0 to B3FF (1024 points)
Internal relay for MELSECNET which cannot be output. May be
used as an internal relay if not assigned for data link use.
F Annunciator F0 to F255 (256 points)
Used to detect a fault. When switched ON during RUN by a fault
detection program, it stores a corresponding number in a special
register D.
T 100 msec timer* T0 to T199 (200 points)
T 10 msec timer* T200 to T255 (56 points)
Forward timers are available in 100 msec, 10 msec and 100 msec
T
100 msec retentive
timer* Can be used by setting a parameter
(0 points)
retentive types.
C Counter* C0 to C255 (256 points)
C Interrupt counter*
Can be used by setting a parameter
(0 points) Forward counters are available in normal and interrupt types.
D Data register D0 to D1023 (1024 points) Memory for storing values.
D Special register D9000 to D9255 (256 points) Predefined data memory for special purposes.
W Link register W0 to W3FF (1024 points)
Data register for MELSECNET. May be used as a data register if
not assigned for MELSECNET use.
R File register*
Can be used by setting a parameter
(0 points)
Extends the data register utilizing the user memory area.
A Accumulator A0, A1 (2 points)
Data register for storing the operation results of basic and
application instructions.
Z Index register Z (1 point)
V Index register V (1 point)
Used to index device numbers
(X, Y, M, L, B, F, T, C, D, W, R, K, H, P).
N Nesting N0 to N7 (8 levels) Indicates the nesting of master controls.
A1SJHCPU/A1SHCPU : X/Y00 to X/YFF
(X, Y total 256 points)
A2SHCPU : X/Y000 to X/Y1FF
(X, Y total 512 points)
A2SHCPU-S1 : X/Y0 to X/Y3FF
(X, Y total 1024 points) A1SJHCPU/A1SHCPU : X/Y00 to X/YFF
(X, Y total 256 points)
A2SHCPU : X/Y000 to X/Y1FF
(X, Y total 512 points)
A2SHCPU-S1 : X/Y0 to X/Y3FF
(X, Y total 1024 points)