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5 SEQUENCE INSTRUCTIONS
5.1 Contact Instructions
Pulse NOT operation start, pulse NOT series connection, pulse
NOT parallel connection
LDPI, LDFI, ANDPI, ANDFI, ORPI, ORFI
■LDPI, LDFI
• LDPI is the rising edge pulse NOT operation start instruction that is on only at the falling edge of the specified bit device
(when the bit device goes from on to off) or when the bit device is on or off. If a word device has been specified, LDPI is on
only when the specified bit is 0, 1, or changes from 1 to 0.
• LDFI is the falling edge pulse NOT operation start instruction that is on only at the rising edge of the specified bit device
(when the bit device goes from off to on) or when the bit device is on or off. If a word device has been specified, LDPI is on
only when the specified bit is 0, 1, or changes from 0 to 1.
• QnU(D)(H)CPU, QnUDE(H)CPU: the serial number (first five digits) is "10102" or later
• Q00UJCPU, Q00UCPU, Q01UCPU, QnUDVCPU: Supported
(S): Devices used as contacts (bits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant Others
DX
Bit Word Bit Word
(S)
Device specified in LDPI or LDFI LDPI state LDFI state
Bit device Word device bit designation
OFF to ON 0 to 1 OFF ON
OFF 0 ON ON
ON 1 ON ON
ON to OFF 1 to 0 ON OFF
Basic
High
performance
Process
Redundant
Universal
LCPU
Ver.
X1/D0.1
X1/D0.1
X2/D0.2
X2/D0.2
X3/D0.3
X3/D0.3
LDPI
LDFI
ORPI
ANDPI
ANDFI
ORFI
Bit device number / Word device bit designation ( )
S
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