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39
CPU MODULE
4.
4.4.3
Sequence accumulation time processing
With QCPU-A, as the scan time becomes faster, it may affect the processing of FROM/TO
instruction or the scan time for special function modules.
Such problems can be avoided by using the following special relay and special register as
interlock and executing FROM/TO instruction in the unit of several ms.
(1) Procedure
Number
Name
Description
Details
Set by
(Set at)
M9077
Sequence
accumulation time
measurement
ON: Timeout
OFF:Not timeout
• Compares the setting value at D9077 with the time
elapsed from the start of measurement (accumulation
time) at every scan. Then, performs the following
operations:
Setting value Accumulation time
:
Setting value Accumulation time
:
When M9077 is already off, clears the accumulation
time.
*
*
System
D9077
Sequence
accumulation time
measurement
Accumulation
time setting
• Stores the accumulation time used by M9077.
Setting range: 1 to 255ms (Default: 5ms)
*
User
Turns on M9077 and clears the accumulation time.
Turns from on to off M9077 and clears the
accumulation time.
When 1 to 255 is designated at D9077, M9077 is
turned on at the first scan.
When a value other than 1 to 255 is designated at
D9077, the value in D9077 is reset to 0 and M9077 is
always turned off.
When a value other than 1 to 255ms is designated,
the value in D9077 is reset to 0.