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SECTION 6
Program Execution Timing
This section explains the execution cycle of the PC and shows how to calculate the cycle time and I/O response times.
I/O response times in Link Systems are described in the individual System Manuals.
6-1
PC Operation
414
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1-1
Initialization
414
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1-2
Synchronous Operation in the Duplex System
415
. . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1-3
I/O Refreshing Limitations
416
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1-4
Memory Card Usage Limitations
416
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1-5
CPU Processing after Power Interruptions
416
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1-6
I/O Refreshing in SYSMAC BUS/2 and SYSMAC BUS Systems
417
. . . . . . . . . . . .
6-1-7
Power OFF Operation
417
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2
Cycle Time
418
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2-1
Synchronous Operation
419
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2-2
Duplex Initialization
420
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2-3
Switching from Duplex to Simplex Operation
421
. . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2-4
Example of Error Detection Program
422
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2-5
Operations Significantly Increasing Cycle Time
422
. . . . . . . . . . . . . . . . . . . . . . . . . .
6-2-6
Potential Problems with Event Processing
423
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3
Calculating Cycle Time
423
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4
Instruction Execution Times
425
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5
I/O Response Time
437
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5-1
I/O Units Only
437
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-5-2
I/O Response Times in a SYSMAC BUS System
438
. . . . . . . . . . . . . . . . . . . . . . . . .
6-5-3
I/O Response Times in a SYSMAC BUS/2 System
439
. . . . . . . . . . . . . . . . . . . . . . .
Summary of Contents for CVM1D
Page 462: ...SYSMAC CVM1D Duplex System Programmable Controllers Operation Manual Revised August 2001...
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