Normally Closed Contact; Contacts In Series; Midline Outputs - Automationdirect.com DirectLOGIC DL205 Series User Manual

Chapter 5: Standard RLL Instructions - Boolean

Normally Closed Contact

1
Normally closed contacts are also very common. This is accomplished with the Store Not, or
STRN instruction. The following example shows a simple rung with a normally closed
contact.
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3
4
5

Contacts in Series

6
Use the AND instruction to join two or more contacts in series. The following example shows
two contacts in series and a single output coil. The instructions used would be STR X0, AND
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X1, followed by OUT Y0.
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Midline Outputs

11
Sometimes it is necessary to use midline outputs to get additional outputs that are conditional
on other contacts. The following example shows how you can use the AND instruction to
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continue a rung with more conditional outputs.
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A
B
C
D
5–6
DL205 User Manual, 4th Edition, Rev. B
DirectSOFT Example
X0
DirectSOFT Example
X0 X1
DirectSOFT Example
X0 X1
X2
Handheld Mnemonics
Y0
STRN X0
OUT Y0
OUT
END
END
Handheld Mnemonics
STR X0
Y0
AND X1
OUT
OUT Y0
END
END
Handheld Mnemonics
Y0
OUT
Y1
OUT
X3 Y2
OUT
END
STR X0
AND X1
OUT Y0
AND X2
OUT Y1
AND X3
OUT Y2
END