Mitsubishi Electric Q26UD(E)HCPU - Redundant CPU

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6.2.4 Redundant CPU
*1 The size unit of the files stored in the memory area differs depending on the CPU module. For details, refer to the
following.
Qn(H)/QnPH/QnPRHCPU User's Manual (Function Explanation, Program Fundamentals)
*2 The maximum number of executable sequence steps is obtained by the following formula.
(Program size) - (File header size (Default: 34 steps))
For details of the program size and files, refer to the following.
Qn(H)/QnPH/QnPRHCPU User's Manual (Function Explanation, Program Fundamentals)
*9 For the CPU module whose serial number (first five digits) is "16020" or earlier, the maximum memory card size is 2M
bytes.
Item
Redundant CPU
Q12PRHCPU Q25PRHCPU
Control method Stored program cyclic operation
I/O control mode
Refresh mode
(Direct access I/O is available by specifying direct access I/O (DX, DY).)
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 (Programming by PX Developer)
Processing
speed
(sequence
instruction)
LD X0 34ns
MOV D0 D1 102ns
Processing
speed
(redundant
function)
Tracking
execution time
(increased 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 size
*1, *2
124K steps
(496 bytes)
252K steps
(1008 bytes)
Memory size
*1
Program memory
(drive 0)
496K bytes 1008K bytes
Memory card
(RAM)
(drive 1)
Size of the installed memory card (4M bytes max.)
*9
Memory card
(ROM)
(drive 2)
Size of the installed memory card
(Flash card: 4M bytes max., ATA card: 32M bytes max.)
Standard RAM
(drive 3)
256K bytes
Standard ROM
(drive 4)
496K bytes 1008K bytes
CPU shared
memory
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