Hakko Electronics Monitouch V Series, Справочное руководство

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Appendix 2 Process Cycle
A2-5
A2
If
Comm
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c
a
ti
on S
p
e
ed i
s
Sl
ow:
Notes
•
The write area is not shown in the above illustration because it is processed
at a cycle different from the read area.
•
For one cycle that is executed when the screen is opened, data of all the
parts placed on the screen is read and the screen OPEN macro is executed;
consequently, processing is not the same as shown above.
If Communication Speed is Slow:
To speed up the communications, try the following method.
♦
Conventions for Screen Creation
•
Consecutively allocate the PLC memory addresses that are used for the
same screen.
↓
When the number of blocks decreases, the cycle time can be shorter.
•
[Process Cycle] for each part
Set [Process Cycle] considering the entire amount of screen data, data type,
or functional properties.
Example:
- For data display parts where data is written by the V series in entry mode
without any changes from the PLC or for those that are hardly changed,
select [Refresh].
- Select [Low Speed] for data display parts where the display speed on the
V series need not be fast in response to data changes in the PLC.
- For data display parts that must be displayed in real time, select [High
Speed].
•
Macro
When the macro function is used, reduce the number of accesses to the
PLC.
Example:
With [MOV] command:
Line No. 0 D200 = $u200 (W)
Line No. 0 D201 = $u201 (W)
Line No. 0 D202 = $u202 (W)
Line No. 0 D203 = $u203 (W)
Line No. 0 D204 = $u204 (W)
When the above is set, write operation to the PLC is performed five times.
However, when [BMOV] command is used:
Line No. 0 D200 = $u200 C:5 (BMOV)
Only one line is required. Write operation to the PLC is performed only once.