Mitsubishi Electric MELSEC Q Series User Manual page 47

Item
Communication using QCPU
standard area by auto
refresh
Communication using multi-
ple CPU high speed trans-
mission area by auto
*8
refresh
Communication using CPU
shared memory by a pro-
Communica-
gram
tion between
CPU mod-
ules
Communication from Univer-
sal model QCPU to Motion
CPU
Communication from the
Universal model QCPU to
the PC CPU module/C Con-
troller module
Communication from the
Universal model QCPU to
the Universal model QCPU
Factors for increasing scan
Scan time
time
Parameters added for multi-
Parameter
ple CPU system
AnS/A series-compatible
Caution
module
1 - 22
Table1.5 Difference from single CPU system (continued)
Single CPU system
Not available
Not available
Not available
Not available
Not available
Not available
Writing data during RUN or
communication processing
time setting, etc.
Not available
The AnS/A series-compatible modules cannot be used.
Multiple CPU system
Transmission from each CPU module
is up to 2k words in total of four ranges.
The total for all CPU modules is 8k
words.
A memory size that can be used for all
CPU modules is as shown below.
Using two CPU modules: 14k words
Using three CPU modules: 13k words
Using four CPU modules: 12k words
Perform communication with the TO
instruction, FROM instruction, and/or
an instruction using the multiple CPU
shared device (U3En\G ).
Communication is available with the fol-
lowing:
Motion dedicated instruction: 5 types
Multiple CPU high-speed transmission
dedicated instruction: 3 types
Perform communication with the multi-
ple CPU transmission dedicated
instruction: 1 type.
Perform communication with the multi-
ple CPU high-speed transmission dedi-
cated instruction: 2 types.
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)Multiple CPU synchronized boot-up
(Multiple CPU settings)
6)Multiple CPU high speed transmis-
sion area setting (Multiple CPU set-
*9
tings)
7)Communication area setting(refresh
setting)
Some parameters must be set to the
same for all CPU modules while others
may be different for each CPU module.
Reference
Section 4.1.2
Section 4.1.3
Section 4.1.4
Section 4.2,
Section 4.3.1
Section 4.3.2
Section 4.3.3
Section 5.2
Section 6.1
Section 7.1