Ny-Series Instructions Reference Manual (W560 - Omron NY532-5400 Reference Manual

The following table shows the relationship between Reset, Load, CV, QU, and QD. This assumes that
the value of PV is larger than 0.
Reset Load
FALSE FALSE
TRUE FALSE
FALSE TRUE
TRUE TRUE
The following figure shows a programming example and timing chart for a PV of INT#3.
LD
CTUD_instance
A
CU
CD
B
abc Reset
def
Load
PV
INT#3

NY-series Instructions Reference Manual (W560)

CV QU QD
0 or FALSE TRUE
lower
Between FALSE FALSE
0 and PV
PV or TRUE FALSE
higher
0 FALSE TRUE
PV TRUE FALSE
0 FALSE TRUE
ST
CTUD_instance(A, B, abc, def, INT#3, ghi, jkl, mno);
ghi
CTUD
QU
QD jkl
CV mno
2 Instruction Descriptions
Operation
Only up counter operation is performed.
• CV is incremented when CU changes to TRUE. It is
not decremented when CD changes to TRUE.
Both up and down counter operation is performed.
• CV is incremented when CU changes to TRUE and
decremented when CD changes to TRUE.
Only down counter operation is performed.
• CV is decremented when CD changes to TRUE. It is
not incremented when CU changes to TRUE.
The up counter is reset.
• The value of CV is set to 0.
The down counter is reset.
• The value of CV is set to PV.
The up counter is reset. Reset take priority over Load.
• The value of CV is set to 0.
2
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