LSIS XGK-CPUA, User Manual

Page: 43 / 205

Chapter 5 Program Configuration and Operation Method
5 - 4
Network Service = Service of communication module in basic base+ Service
④
of communication
module in expansion base
= (No. of Service x 3
㎲
) + (total TRX data(byte)/4 x 0.056 [CPUS:0.112]
㎲
)
+ (Comm. module TRX data of basic base (byte))/4 x 0.084
㎲
+ (Comm. module TRX data of expansion base (byte))/4 x 0.280
㎲
* The number of service and TRX data occurred within one scan are standard of calculation
⑤
XG5000 Service process time: 100
㎲
at the max data monitor
(But, in case of changing the monitor screen, scan time increases for the mean time. In case of
connected with “USB Max. Write”, 6ms. In case of connected “USB Normal Write”, 1.6ms.
⑥
Task Program process time: sum of task processing time that occurs within a scan; the time
calculation by task programs are as same as that of scan program.
(2) Example
The scan time of a system consisting of CPUH (program 16kstep) + six 32-point I/O m six analog
m four communication modules (200 byte 8 blocks per module)
Scan time(
㎲
) = ladder execution time + system processing time + digital module I/O processing
time + analog I/O processing time
+ communication module processing time + XG5000 Service processing time
= (16000 x 0.028) + (600) + (20 x 6) + (75 x 6) + ((170 + 44 x 8) x 4) + (100)
= 3806
㎲
= 3.806
㎳
2) Scan time monitor
(1) Scan time is saved into the following flag(F) areas.
z
F0050 : max value of scan time (unit: 0.1ms)
z
F0051 : min value of scan time (unit: 0.1ms)
z
F0052 : current scan time value (unit: 0.1ms)