2
- 14
2.4 Redundant CPU
2
PERFORMANCE SPECIFICATION
*6
: Read only when Flash card is used. ATA card is unusable.
*7
: The step relay is the device for the SFC function.
Table2.4 Performance Specifications
Item
Redundant CPU
Q12PRHCPU
Q25PRHCPU
No. of device po
int
s
File
register*
6
[R]
Standard RAM
Up to 131072 points can be used by block switching in units of 32768 points (R0 to 32767).
SRAM card (1M
bytes)
Up to 517120 points can be used by block switching in units of 32768 points (R0 to 32767).
SRAM card (2M
bytes)
Up to 1041408 points can be used by block switching in units of 32768 points (R0 to 32767).
Flash card (2M
bytes)
Up to 1041408 points can be used by block switching in units of 32768 points (R0 to 32767).
Flash card (4M
bytes)
Up to 1042432 points can be used by block switching in units of 32768 points (R0 to 32767).
[ZR]
Standard RAM
131072 points (ZR0 to 131071), block switching not required.
SRAM card (1M
bytes)
517120 points (ZR0 to 517119), block switching not required.
SRAM card (2M
bytes)
1041408 points (ZR0 to 1041407), block switching not required.
Flash card (2M
bytes)
1041408 points (ZR0 to 1041407), block switching not required.
Flash card (4M
bytes)
1042432 points (ZR0 to 1042431), block switching not required.
Link special relay [SB]
2048 points (SB0 to 7FF) (The number of device points is fixed)
Link special register [SW]
2048 points (SW0 to 7FF) (The number of device points is fixed)
Step relay [S]
*7
8192 points (S0 to 8191) (The number of device points is fixed)
Index register [Z]
16 points (Z0 to 15) (The number of device points is fixed)
Pointer [P]
4096 points (P0 to 4095) (The number of device points is fixed), The use ranges of the local
pointers and common pointers can be set up by parameters.
Interrupt pointer [I]
256 points (I0 to 255) (The number of device points is fixed),
The constant cyclic interval of system interrupt pointers I28 to 31 can be set up by parameters.
(0.5 to 1000ms, 0.5ms unit)
Default values I28: 100ms, I29: 40ms, I30: 20ms, I31: 10ms