AutomationDirect DL105, User Manual

Page: 164 / 350

Standard
RLL
Instructions
5--4
Standard RLL Instructions
Boolean Instructions
DL105 PLC User Manual, 3rd Edition
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.
OUT
Y0 X0
END
Direct SOFT Example Handheld Mnemonics
STRN X0
OUT Y0
END
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 X1, followed by OUT Y0.
OUT
Y0 X0
END
X1
Direct SOFT Example Handheld Mnemonics
STR X0
AND X1
OUT Y0
END
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 continue a rung with more conditional outputs.
OUT
Y0 X0
END
X1
Direct SOFT Example Handheld Mnemonics
STR X0
AND X1
OUT Y0
AND X2
OUT Y1
AND X3
OUT Y2
END
X2
OUT
Y1
X3
OUT
Y2
Normally Closed
Contact
Contacts in Series
Midline Outputs