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305
CPU Processing Modes
Section 6-8
Peripheral Servicing
Note Event servicing to access I/O memory includes 1) Servicing any received
FINS commands that access I/O memory (I/O memory read/write commands
with common codes beginning with 01 Hex or forced set/reset commands with
common codes beginning with 23 Hex) and 2) Servicing any received C-mode
commands that access I/O memory (excluding NT Links using the peripheral
or RS-232C port).
Parallel Processing with Synchronous Memory Access
Program Executions
Peripheral Servicing
Note Event servicing to access I/O memory includes 1) Servicing any received
FINS commands that access I/O memory (I/O memory read/write commands
Overseeing
Battery check, user program
memory check, etc.
0.2 ms
Peripheral
servicing
Event servicing for Special I/O Units
Includes event servicing to
access I/O memory (See note.)
Max. of 1 s for each service.
Event servicing for CPU Bus Units
Peripheral port servicing
RS-232C port servicing
Event servicing for Inner Boards (CS
Series only)
Event servicing for communications
ports (internal logic ports) that are
being used (including background
execution)
Overseeing
I/O bus check and other processing
0.3 ms
Instruction execution time
Total execution time for all instructions
Minimum cycle time calculations
Processing time for a minimum program execu-
tion cycle time
Cyclic ser-
vicing
I/O refresh
I/O refresh time for each Unit x Number of Units
Special I/O refresh
for CPU Bus Units
Special I/O refresh time for each Unit x Number of
Units
Peripheral
servicing
File access
Peripheral service time set in PLC Setup (default:
4% of cycle time)
Event servicing
requiring I/O mem-
ory access (See
note.)
Overseeing
Battery check, user program
memory check, etc.
0.2 ms
Peripheral
servicing
Event servicing for Special I/O Units
Except for event servicing to
access I/O memory (See note.)
Max. of 1 s for each service.
Event servicing for CPU Bus Units
Peripheral port servicing
RS-232C port servicing
Event servicing for Inner Boards (CS
Series only)
Event servicing for communications
ports (internal logic ports) that are
being used (including background
execution)
Summary of Contents for CJ1G-CPU series
Page 3: ...iv...
Page 5: ...vi...
Page 21: ...xxii Conformance to EC Directives 6...
Page 169: ...148 Task Control Instructions Section 3 32...
Page 203: ...182 Programming Device Operations for Tasks Section 4 4...
Page 253: ...232 Using File Memory Section 5 3...
Page 337: ...316 Other Functions Section 6 11...
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Page 381: ...360 Revision History...