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DL205 User Manual, 4th Edition, Rev. B
5–22
Chapter 5: Standard RLL Instructions - Boolean
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
Or Positive Differential (ORPD)
The Or Positive Differential instruction logically ORs a
contact in parallel with another contact in a rung. The status
of the contact will be open until the associated image register
point makes an Off-to-On transition, closing it for one CPU
scan. Thereafter, it remains open until another Off-to-On
transition.
Or Negative Differential (ORND)
The Or Negative Differential instruction logically ORs a
contact in parallel with another contact in a rung. The status
of the contact will be open until the associated image register
point makes an On-to-Off transition, closing it for one CPU
scan. Thereafter, it remains open until another On-to-Off
transition.
In the following example, Y 5 will energize whenever X1 is on, or for one CPU scan when X2
transitions from Off to On.
In the following example, Y 5 will energize whenever X1 is on, or for one CPU scan when X2
transitions from On to Off.
Aaaa
Aaaa
Operand Data Type DL250-1 Range DL260 Range
A aaa aaa
Inputs X 0–777 0–1777
Outputs Y 0–777 0–1777
Control Relays C 0–1777 0–3777
Stage S 0–1777 0–1777
Timer T 0–377 0–377
Counter CT 0–177 0–377
Global GX – 0–3777
Global GY – 0–3777
Y5
OUT
X1
Direct SOFT
X2
STR
$
CV
P
ENT
OUT
GX
3
D
SHFT
1
B
ENT
Handheld Programmer Keystrokes
5
F
OR
Q
2
C
ENT
X1
Y5
OUT
Direct SOFT
X2
STR
$
TMR
N
ENT
OUT
GX
3
D
SHFT
1
B
ENT
Handheld Programmer Keystrokes
5
F
OR
Q
2
C
ENT
ý
ý
þ
þ
230
240
2 5 0 -1
2 6 0
ý
ý
þ
þ
230
240
2 5 0 -1
2 6 0
DS Implied
HPP Used