APPENDIX
A-2 OPENNET CONTROLLER USER’S MANUAL
Breakdown of END Processing Time
The END processing time depends on the OpenNet Controller settings and system configuration. The total of execution
times for applicable conditions shown below is the actual END processing time.
Note 1: Calendar/clock function is processed once every 100 msec.
Note 2: Data link slave stations are processed in interrupt processing asynchronous to the ordinary system processing.
In addition to processing user program instructions and END instruction, the OpenNet Controller system processing
includes interrupt processing of various functions.
I/O Delay Time
The minimum delay from a standard input to a standard output in the program below is 1.31 msec.
• Maximum execution time
LOD 0.65 µsec
OUT 1.15 µsec
• END processing time (without interrupt processing)
Housekeeping 540 µsec
I/O service 630 µsec
• Input delay time (DC input without filter setting)
40 µsec
• Output delay time (transistor output)
Approx. 100 µsec
The I/O delay time may be increased by such factors as increased END processing time (caused by frequent interrupt pro-
cessing and larger program size) and input filter setting.
Item Condition Execution Time
Housekeeping 540 µsec
I/O service
IN/OUT 32/32 points 630 µsec
IN/OUT 64/64 points 730 µsec
IN/OUT 128/128 points 910 µsec
IN/OUT 240/240 points 1400 µsec
Calendar/clock function processing
(Note 1)
66 µsec
Data link master station processing
(Note 2)
When using a data link system
(separate refresh mode)
2.083 × transmit/receive words + 3.125 msec
(at 19200 bps)
See page 21-9.
I0
Instruction Data
LOD
OUT
I0
Q0
Q0
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