Mitsubishi Electric MELSEC Q Series User Manual page 41

Communication using CPU
shared memory by auto
refresh
Communication using CPU
shared memory by programs
Communica-
tion between
Communication from High
CPU mod-
Performance model QCPU
ules
to Motion CPU
Communication from the
High Performance model
QCPU to the PC CPU mod-
ule/C Controller module
Factors for increasing scan
Scan time
time
Parameters added for multi-
Parameter
ple CPU system
AnS/A series-compatible
Caution
module
*1: "No. of CPUs" indicates the number of CPU modules set at "No. of PLC" in the Multiple CPU settings screen of PLC parameter.
*2: When the PC CPU module is mounted, the maximum number of mountable I/O modules is the result of "65 - (No. of CPUs + 1)".
*3: When the Motion CPU or PC CPU module is mounted on the multiple CPU system, Q3 RB, Q6 RB, and Q6 RP are not available.
*4: For some intelligent function modules, different version may be used.
*5: When the PC CPU module is mounted, the slot to the right of the PC CPU module is 10
1 - 16
Table1.3 Difference from single CPU system (continued)
Single CPU system
Not available
Not available
Not available
Not available
Writing data during RUN or
communication processing
time setting, etc.
Not available
Use is allowed.
Multiple CPU system
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 communi-
cation 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 assign-
ment 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.
Use is allowed when the High Perfor-
mance model QCPU is set to the con-
trol CPU.
.
H
Reference
Section 4.1.2
Section 4.1.4
Section 4.2,
Section 4.3.1
Section 4.3.2
Section 5.2
Section 6.1
Section 7.1