Mitsubishi MELSEC-Q Series User Manual page 47

1
OUTLINE
Item
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
shared memory by programs
Communication
Communication from High
between CPU
Performance model QCPU to
modules
Motion CPU
Communication from the High
Performance model QCPU to the
PC CPU module/C Controller
module
Scan time Factors for increasing scan time
Table1.12 Difference from single CPU system (continued)
Single CPU system
All modules can be controlled.
Accessible
Accessible
Accessible
Accessible through USB or RS-232
cable, or via network.
Clock data of the High Performance
model QCPU is used.
The entire system is reset by
resetting the High Performance
model QCPU.
The system stops.
----
----
----
----
Writing data during RUN or
communication processing time
setting, etc.
Multiple CPU system
Setting the relations between the CPU
module and other modules with the PLC
parameter (control CPU) is required.
Accessible to the High Performance model
QCPU of the specified CPU No.
Only control CPU is accessible.
Only control CPU is accessible.
Accessible through USB or RS-232 cable, or
via network.
For access when the Motion CPU, PC CPU
module, or C Controller module is connected,
refer to the manual of each CPU module.
Clock data of the High Performance model
QCPU (CPU No. 1) is used.
The entire system is reset by resetting the
High Performance model QCPU (CPU No. 1).
(Resetting CPU No. 2 to 4 individually is not
allowed.)
For a stop error of the High Performance
model QCPU of CPU No. 1, the multiple CPU
system stops. (CPU modules No. 2 to 4 are in
"MULTI CPU DOWN (Error code: 7000)"
status.
For a stop error occurred in any of CPU No. 2
to 4, the operation depends on the parameter
setting of "Operation mode".
Up to 2k words in total of 4 settings per CPU.
The total for all CPU modules is 8k words.
With S.TO / 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
Instruction dedicated to the communication
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.
----: Not available
1.3 Difference from Single CPU System
1
Reference
Section 3.4
2
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
Section 4.2,
Section 4.3.1 6
Section 4.3.2
Section 5.2
7
8
1
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