Parallel Elements; Joining Series Branches In Parallel; Joining Parallel Branches In Series; Combination Networks - Automationdirect.com DirectLOGIC DL205 Series User Manual

Parallel Elements

You may also have to join contacts in parallel. The OR instruction allows you to do this. The
following example shows two contacts in parallel and a single output coil. The instructions
would be STR X0, OR X1, followed by OUT Y0.
DirectSOFT Example
X0
X1

Joining Series Branches in Parallel

Quite often it is necessary to join several groups of series elements in parallel. The Or Store
(ORSTR) instruction allows this operation. The following example shows a simple network
consisting of series elements joined in parallel.
DirectSOFT Example
X0 X1
X2 X3

Joining Parallel Branches in Series

You can also join one or more parallel branches in series. The And Store (ANDSTR)
instruction allows this operation. The following example shows a simple network with contact
branches in series with parallel contacts.
DirectSOFT Example
X0

Combination Networks

You can combine the various types of
series and parallel branches to solve most
any application problem. The following
example shows a simple combination
network.
Chapter 5: Standard RLL Instructions - Boolean
X1
X2
DL205 User Manual, 4th Edition, Rev. B
Handheld Mnemonics
Y0
STR X0
OR X1
OUT
OUT Y0
END
END
Handheld Mnemonics
Y0
STR X0
AND X1
OUT
STR X2
AND X3
ORSTR
OUT Y0
END
END
Handheld Mnemonics
Y0
STR X0
STR X1
OUT
OR X2
ANDSTR
OUT Y0
END
END
X0 X2
X1 X3 X4
X6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
X5 Y0
B
OUT
C
D
END
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