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2.4 Redundant CPU
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PERFORMANCE SPECIFICATION
2.4 Redundant CPU
*1
: The unit of the file size stored in the memory area varies depending on the CPU module. For the details, refer to the manual below.
*2
: The maximum number of executable sequence steps is as shown below.(Program capacity) - (File header size (default: 34 steps))
For the details, refer to the manual below.
Refer to CHAPTER 5 for details of the program capacity and file.
Table2.4 Performance Specifications
Item
Redundant CPU
Q12PRHCPU
Q25PRHCPU
Control method
Sequence program control method
(Direct access I/O is available by specifying direct access I/O (DX , DY ))
I/O control mode
Refresh mode (Programming by PX Developer)
Program language
Sequence control
language
Relay symbol language, logic symbolic language, MELSAP3 (SFC),
MELSAP-L, function block and structured text (ST)
Process control
language
FBD for process control
Processing speed
(sequence instruction)
LD X0
34ns
MOV D0 D1
102ns
Processing speed
(redundant function)
Tracking execution
time (extended scan
time)
Device memory 48k words: 10ms, Device memory 100k words: 15ms
(
QnPRHCPU User's Manual (Redundant System))
Constant scan
(Function for keeping regular scan time)
0.5 to 2000ms (Setting available in 0.5ms unit.) (Setting by parameters)
Program capacity
*1, *2
124k steps
(496 bytes)
252k steps
(1008 bytes)
Memory capacity
*1
Program memory
(drive 0)
496k bytes
1008k bytes
Memory card (RAM)
(drive 1)
Capacity of the installed memory card (2M bytes max.)
Memory card (ROM)
(drive 2)
Capacity of the installed memory card
(Flash card: 4M bytes max., ATA card: 32M bytes max.)
Standard RAM
(drive 3)
Capacity of the installed memory card (2M bytes max.)
Standard ROM
(drive 4)
496k bytes
1008k bytes
CPU shared
memory
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