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7 rising pulse instruction (on – pls) – Yaskawa Ladder Works Programming Manual User Manual

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1.7 RISING PULSE Instructions (ON – PLS)

1-8

1.7 RISING PULSE Instruction (ON – PLS)

[Outline]

The ON-PLS sets the value of the bit input to ON during one scan when the immediately-preceding
value of the bit output changes from OFF to ON. The designated register is used to store the previous
value of the bit output.

[Format]

Symbol : ON-PLS
Full Name : Rise Pulse
Category : RELAY

Icon :

[Parameter]

Parameter Name

Setting

Register No.

· Any bit type register (except for # and C register)
· Any bit type register with subscript (except for # and C registers)

[Program Example]

When IB00001 turns ON from OFF, MB000101 turns ON and stays ON during 1 scan. MB000100 is
used to store the previous value of IB00001.

IB00001

1 scan

1 scan

MB000100

MB000101

ON

OFF

ON

OFF

ON

OFF

Register status of Rising pulse instruction is shown in Table 1.1.

Table 1.1 Register Status with Rising Pulse Instruction

Input Result

IB00001 MB000100

(Previous value of

IB00001)

MB000100

(IB00001 stored)

MB000101

OFF OFF OFF OFF

OFF ON OFF OFF

ON

OFF

ON

ON

ON ON ON OFF

Notes: Case of Program Example, the instruction is used not for rise detection of MB000100 but

is used for rise detection of IB00001. MB000100 is used only for storing the previous
value of IB00001.