Mitsubishi Electric MOTION CONTROLLERS Q172DCPU Programming Manual page 53

2 MULTIPLE CPU SYSTEM
CPU No.1 (PLC CPU)
PLC program
SM400
INC D0
Y0
SM400
INC D1
Y0
END
(b) Example of using automatic refresh method
Device memory
D0
Refresh at the
timing of END
processing
Parameter
CPU No.1 to CPU No.2
Transmit D0
1) Transmit the content of D0 to the automatic refresh area
2) Transmit the content of automatic refresh area
3) Read the content of automatic refresh area
. Note-1: The area composed in the Multiple CPU high speed transmission area.
(Refer to Section "(3) Memory configuration of Multiple CPU high speed transmission area".)
(2) System configuration
Multiple CPU high speed transmission can be used only between CPU modules
for the Multiple CPU high speed transmission installed in the Multiple CPU high
speed main base unit (Q3 DB).
The system configuration specification is shown in Table 2.4.
Table 2.4 System configuration to use Multiple CPU high speed
transmission
Object
Base unit Multiple CPU high speed main base unit (Q3 DB) is used.
QnUD(H)CPU is used for CPU No. 1.
CPU module
Q173DCPU/Q172DCPU and QnUD(H)CPU are used for CPU No. 2 to
CPU No. 4
"MULTI EXE. ERROR (error code: 7011) will occur if the power supply of Multiple
CPU system is turned on without matching the system configuration shown in
Table 2.4.
CPU shared memory
(Note-1)
(Automatic refresh area )
1)
2)
CPU No.1
transmitting
data
Multiple CPU high speed
transmission in 0.88ms cycle
at the time of END processing by parameter setting.
(Note-1)
(Note-1) to the other CPU by Multiple CPU high speed transmission at 0.88ms cycle.
at the time of Motion CPU main cycle and transmit it to D2000 by parameter setting.
(Note-1)
2 - 16
CPU No.2 (Motion CPU)
CPU shared memory
(Note-1)
(Automatic refresh area )
3)
CPU No.1
transmitting
data
Refresh at the
timing of Motion
CPU main cycle
Parameter
CPU No.1 to CPU No.2
Restrictions
Device memory
D2000
Receive D2000