11 - 2 11 - 2
MELSEC-Q
11 HIGH PERFORMANCE MODEL QCPU PROCESSING TIME
11.2 Factors Responsible for Extended Scan Time
The following functions increase the length of scan time. When using any of the
following functions, add a value of extended time to values obtained from Section 11.1.
• MELSECNET/H refresh
• CC-Link automatic refresh
• Sampling trace
• GX Developer monitoring
• Local devices
• Execution of multiple programs
• Installation/removal of a memory card
• File register with the same filename as a program.
(1) MELSECNET/H refresh
MELSECNET/H refresh requires additional processing time to refresh data
between the High Performance model QCPU and the MELSECNET/H network
module. For details on MELSECNET/H refresh time, see Q Corresponding
MELSECNET/H Network System Reference Manual.
(2) CC-Link automatic refresh
CC-Link automatic refresh requires additional processing time to refresh data
between the High Performance model QCPU and the CC-Link's master local
module. When a CC-Link master local module is installed, extended scan time
can be shortened by adjusting a CC-Link setting to a system setting. For details
on CC-Link automatic refresh time, see the QJ61BT11 Type CC-Link System
Master Local Module Users Manual.
(3) Sampling trace time
Sampling trace requires additional processing time. When sampling trace data is
specified to execute the sampling trace function, add the sampling trace time to
the total processing time.
The table below shows the length of processing time required when sampling
trace data is specified to assign 50 internal relay points for bit devices and 50
data register points for word deices.
CPU Type
Processing Time
Q02CPU
0.24 ms
Q02HCPU, Q06HCPU, Q12HCPU, Q25HCPU
0.12 ms
11
Содержание QCPU (Q Mode)
Страница 111: ...5 19 5 19 MELSEC Q 5 ASSIGNMENT OF I O NUMBERS MEMO ...
Страница 450: ...App 59 App 59 MELSEC Q APPENDICES MEMO ...