Mitsubishi Electric FX3G SERIES Programming Manual page 196

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. LDF, ANDF, and ORF instructions (initial logical operation of falling/trailing edge pulse, serial
connection of falling/trailing edge pulse, and parallel connection of falling/trailing edge pulse)
Circuit program
LDF instruction
X000
X001
ORF instruction
M8000 X002
RUN monitor
Timing chart
LDF instruction
ORF instruction
ANDF instruction
In the example shown above, M0 or M1 is ON during only one operation cycle when X000 to X002 turn OFF from ON.
3. Bit specification of a data register (D)
A bit in data register (D) can be specified as a device used in LDP, LDF, ANDP, ANDF, ORP and ORF instructions.
Circuit program
D0.3
*1. This function is supported only in FX
194
M0
ANDF instruction
M1
ON
X000
X001
M0
M8000
ON
X002
ON during
one opera-
M1
tion cycle
List program
0000
0003
Y000
3U
List program
0000 LDF X000
0002 ORF X001
0004 OUT M0
0005 LD M8000
0006 ANDF X002
0008 OUT M1
ON
ON
ON during
one opera-
tion cycle
ON
ON ON
*1
When specifying a bit in a data register, input "."
after a data register (D) number, and then input a
bit number (0 to F) consecutively.
Only 16-bit data registers are available.
LDP D0.3
Specify a bit number as "0, 1, 2, ... 9, A, B, ... F"
OUT Y000
from the least significant bit.
Example: In the example shown on the left, LDP
/FX PLCs.
3UC
7 Basic Instruction
7.5 LDP, LDF, ANDP, ANDF, ORP, ORF
ON
contact turns ON (becomes
conductive) or OFF (becomes non-
conductive) when bit 3 of D0 turns ON
or OFF.