NAiS FP1

5-3. Description of Basic Instructions
103
Outline AN: Connects a Form A (normally open) contact serially.
AN/: Connects a Form B (normally closed) contact serially.
Program example
■ Operands ■ Time chart
■ Explanation of example
• Y0 goes ON when both X0 and X1 turn ON and also X2 turns OFF.
Description
• Performs a logical AND operation with the results of the immediately preceding serially
connected operation.
Notes:
• Use the AN instruction when the normally open contact (Form A contact) is serially connected. Use the
AN/ instruction when the normally closed contact (Form B contact) is serially connected.
• The AN and AN/ instructions can be used consecutively.
ON
OFF
X0
ON
OFF
X1
ON
OFF
X2
ON
OFF
Y0
Timer/Counter
Contact
C
Relay
TRYX
Instruction
AN, AN/
AAA A A
A:
N/A: Not Available
Available
AN
AND
AN/
AND Not
Availability
Step
1
1
All series
Ladder Diagram FP Programmer II key operations
Boolean Non-ladder
Address Instruction
0
X1 Y0
AND
AND Not
X2
X0
ST
X-WX
ST
X-WX
ST
X-WX
0 WRT
AN
Y-WY
WRT1
AN
Y-WY
NOT
DT/Ld
WRT
OT
L-WL
AN
Y-WY
0 WRT
ST
X-WX
WRT2
0
1
2
3
ST X 0
AN X 1
AN/ X 2
OT Y 0
X2 X3
X0
Y0
Y1
X1
X0
Y0
X1 X2 X3