Mitsubishi MELSEC-Q Series User Manual page 50

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
between CPU
Communication from Process
modules
CPU to Motion CPU
Communication from the Process
CPU to the PC CPU module/C
Controller module
Scan time Factors for increasing scan time
Parameters added for multiple
Parameter
CPU system
Caution AnS/A series-compatible module
1
- 27 1.3 Difference from Single CPU System
Table1.13 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 Process CPU is
used.
The entire system is reset by
resetting the Process CPU.
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
Setting the relations between the CPU
module and other modules with the PLC
parameter (control CPU) is required.
Accessible to the Process CPU 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 Process CPU (CPU No. 1)
is used.
The entire system is reset by resetting the
Process CPU (CPU No. 1).
(Resetting CPU No. 2 to 4 individually is not
allowed.)
For a stop error of the Process CPU 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 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
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 (auto 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
Reference
Section 3.4
Manuals for GOT
Section 3.6
CC-Link system
master/local
module manuals
Section 2.2
Section 3.8.2
Section 3.9
Section 3.10
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