Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 152

Sequence Output Instructions
Example
Note
3-3-4 DIFFERENTIATE UP/DOWN: DIFU(013) and DIFD(014)
Purpose
Ladder Symbols
When CIO 0.00 goes ON in the following example, CIO 100.00 is turned ON.
CIO 100.00 remains ON until CIO 0.01 goes ON.
When CIO 0.02 goes ON and CIO 0.03 goes OFF in the following example,
CIO 100.01 is turned ON. CIO 100.01 remains ON until CIO 0.04 or CIO 0.05
goes ON.
0.00
0.01
0.02 0.03
0.04
0.05
Coding
Address
000100
000101
000102
000103
000104
000105
000106
000107
KEEP(011) is input in different orders on in ladder and mnemonic form. In lad-
der form, input the set input, KEEP(011), and then the reset input. In mne-
monic form, input the set input, the reset input, and then KEEP(011).
DIFU(013) turns the designated bit ON for one cycle when the execution con-
dition goes from OFF to ON (rising edge).
DIFD(014) turns the designated bit ON for one cycle when the execution con-
dition goes from ON to OFF (falling edge).
DIFU(013)
B
DIFD(014)
B
100.00
100.01
Instruction
LD
LD
KEEP (011)
LD
AND NOT
LD
OR
KEEP (011)
B: Bit
B: Bit
Section 3-3
Operand
0.00
0.01
100.00
0.02
0.03
0.04
0.05
100.01
119