Mitsubishi MELSEC-Q Series User Manual page 45

1
OUTLINE
Item
Restrictions on number of
Concept
mountable modules
Access from CPU module to
other modules
Access from GOT
Access with instruction using link
direct
Access range
Access to CC-Link
Access from peripheral devices
Clock data used by intelligent
Clock function
function module (QD75, etc.)
CPU module resetting operation
Operation
Operation for CPU module stop
error
Communication using CPU
shared memory by auto refresh
Communication using CPU
Communication
shared memory by programs
between CPU
modules
Communication from Basic model
QCPU to Motion CPU
Communication from Basic model
QCPU to PC CPU module
Scan time Factors for increasing scan time
Parameters added for multiple
Parameter
CPU system
Caution AnS/A series-compatible module
Table1.11 Difference from single CPU system (continued)
Single CPU system
The number of mountable modules
per CPU module is restricted
depending on the module type.
All modules can be controlled.
Accessible
Accessible
Accessible
Accessible through RS-232 cable or
via network.
Clock data of the Basic model
QCPU is used.
The entire system is reset by
resetting the Basic model QCPU.
The system stops.
----
----
----
----
Writing data during RUN or
communication processing time
setting, etc.
----
The AnS/A series-compatible modules cannot be used.
Multiple CPU system
The number of mountable modules per QCPU
and per system is restricted depending on the
module type.
Setting the relations between the CPU
module and other modules with the PLC
parameter (control CPU) is required.
Only control CPU is accessible.
Only control CPU is accessible.
Accessible through RS-232 cable or via
network.
For access when the Motion CPU, or PC CPU
module is connected, refer to the relevant
manual.
Clock data of the Basic model QCPU (CPU
No. 1) is used.
The entire system is reset by resetting the
Basic model QCPU (CPU No. 1).
( Resetting CPU No. 2 and 3 individually is
not allowed.)
For a stop error of the Basic model QCPU of
CPU No. 1, the multiple CPU system stops.
(CPU modules No. 2 and 3 are in "MULTI
CPU DOWN (Error code: 7000)" status.
For a stop error occurred in CPU No. 2 or 3,
the operation depends on the parameter
setting of "Operation mode".
Basic model QCPU = 320 points
Motion CPU = 2048 points
C Controller module = 2048 points
PC CPU module = 2048 points
Total points of all CPU modules: 4416 points
With TO, S.TO and/or FROM instructions and
instruction using the multiple CPU area
device (U3En\G ).
Instructions dedicated to the Motion CPU: 5
types, Instructions dedicated to the
communication between multiple CPUs: 3
types
Communication dedicated instruction
between multiple CPUs: 1 type
In addition to factors for the single CPU
system, refresh processing for CPU modules
in Multiple CPU system and waiting time may
increase the scan time.
1) No. of CPU modules (Multiple CPU setting)
2) Control CPU (detailed I/O assignment
setting)
3) Out-of-group I/O setting (Multiple CPU
setting)
4) Operation mode for CPU error stop
(Multiple CPU setting)
5) Communication area setting (refresh
setting) (Multiple CPU setting)
Some parameters must be set to the same for
all CPU modules while others may be
different for each CPU module.
----: Not available
1.3 Difference from Single CPU System
1
Reference
Section 2.4
2
Section 3.4
Manuals for GOT
Section 3.6
CC-Link system
master/local
module manuals
3
Section 2.2
Section 3.8.2
4
Section 3.9
Section 3.10
5
Section 4.1.2
Section 4.1.4
6
Section 4.2,
Section 4.3.1
Section 4.3.2
Section 5.2
7
Section 6.1
8
Section 7.1
1
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