AutomationDirect DL205 - Page 246

DL205 User Manual, 4th Edition, Rev. D
5-22
Chapter 5: Standard RLL Instructions
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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, Y5 will energize whenever X1 is on, or for one CPU scan when X2
transitions from off to on.
In the following example, Y5 will energize whenever X1 is on, or for one CPU scan when X2
transitions from on to off.
Aaaa
Aaaa




230
240
250-1
260




230
240
250-1
260
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
DirectSOFT
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
DirectSOFT
X2
STR
$
TMR
N
ENT
OUT
GX
3
D
SHFT
1
B
ENT
Handheld Programmer Keystrokes
5
F
OR
Q
2
C
ENT
DS Implied
HPP Used