5 LDP, LDF, ANDP, ANDF, ORP, ORF

FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



7.5 LDP, LDF, ANDP, ANDF, ORP, ORF



1

Introduction



Explanation of function and operation

1. LDP, ANDP, and ORP instructions (initial logical operation of rising edge pulse, serial

connection of rising edge pulse, and parallel connection of rising edge pulse)

Circuit program

LDP instruction



0000

0002

0004

0005

0006

0008



M0

X001



ORP instruction



M8000



X002



ANDP instruction



LDP

ORP

OUT

LD

ANDP

OUT



2

Overview



X000



List program



X000

X001

M0

M8000

X002

M1



3

Instruction

List



M1

RUN monitor



Timing chart

X000



ORP instruction



ON



X001



ON



Specified the

Device &

Constant



ON



ON



ON



6



ON during

one operation cycle



In the example shown above, M0 or M1 is ON during only one operation cycle when X000 to X002 turn from OFF to

ON.



Before

Programming



M1



5

ON



M8000



X002



ON



ON during one

operation cycle



M0



ANDP instruction



4



ON



Devices

in Detail



LDP instruction



7

Basic

Instruction



8

FNC00-FNC09

Program Flow



9

FNC10-FNC19

Move & Compare



10

FNC20-FNC29

Arith. & Logic

Operation



195



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



7.5 LDP, LDF, ANDP, ANDF, ORP, ORF



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



X000



List program



LDF instruction



0000

0002

0004

0005

0006

0008



M0

X001

M8000



ORF instruction



X002



ANDF instruction



M1



LDF

ORF

OUT

LD

ANDF

OUT



X000

X001

M0

M8000

X002

M1



RUN monitor



Timing chart

LDF instruction



ORF instruction



ON



X000



ON



X001



ON

ON during

one operation cycle



M0



ON



M8000



ANDF instruction



X002



M1



ON



ON



ON



ON



ON during

one operation cycle



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)*1

A bit in data register (D) can be specified as a device used in LDP, LDF, ANDP, ANDF, ORP and ORF instructions.

When specifying a bit in a data register, input "."

Circuit program

List program

after a data register (D) number, and then input a

bit number (0 to F) consecutively.

Only 16-bit data registers are available.

0000 LDP D0.3

D0.3

Specify a bit number as "0, 1, 2, ... 9, A, B, ... F"

0003 OUT Y000

Y000

from the least significant bit.

Example: In the example shown on the left, LDP

contact turns ON (becomes

conductive) or OFF (becomes nonconductive) when bit 3 of D0 turns ON

or OFF.

*1.



196



This function is supported only in FX3U/FX3UC PLCs.



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



7.5 LDP, LDF, ANDP, ANDF, ORP, ORF



1

Introduction



4. Output drive side

The following two circuits offer the same operation:









X010



X010



=



M6



PLS



2



M6



Overview



X010

M 6



Operation

cycle



Operation

cycle



3



In each circuit, M6 is ON during only one operation cycle when X010 turns from OFF to ON.



X020



FNC 12

MOV



Instruction

List









K10



D0



=



X020



FNC 12

MOVP



K10



D0



4



In each circuit, MOV instruction is executed only once when X020 turns from OFF to ON.



Devices

in Detail



5

Specified the

Device &

Constant



6

Before

Programming



7

Basic

Instruction



8

FNC00-FNC09

Program Flow



9

FNC10-FNC19

Move & Compare



10

FNC20-FNC29

Arith. & Logic

Operation



197



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



7.5 LDP, LDF, ANDP, ANDF, ORP, ORF



5. Differences in the operation caused by auxiliary relay (M) numbers

When an auxiliary relay (M) is specified as a device in LDP, LDF, ANDP, ANDF, ORP and ORF instructions, the

operation varies depending on the device number range as shown in the figure below.



[1]



After M0 is driven by X000, all contacts [1] to [4] corresponding to

M0 are activated.



M0

SET



M50



•The contacts [1] to [3] detect the rising edge of M0.

•Because of LD instruction, the contact [4] is conductive

while M0 is ON.



X000

M0

[2] M0

SET

SET



[3]



M51

M52



M0



[4] M0

M53





M2800

M2800



X000

M2800

M2800



M2800

M2800

M2800



SET



M0



SET



M1



M2800

SET



M2



SET



M3

Block B



SET



M4



SET



M5



SET



M6



M2800

M7



198



Block A



Block C



From M2800 driven by X000, the program is divided into the upper

block (block A) and the lower block (block B). In each of the blocks

A and B, only the first contact which detects the rising or falling edge

is activated.

Because of LD instruction, the contact in the block C is conductive

while M2800 is ON.

By utilizing these characteristics, "transition of state by same signal"

in a step ladder circuit can be efficiently programmed.



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



7.5 LDP, LDF, ANDP, ANDF, ORP, ORF



1



1. Cautions when the LDP, LDF, ANDP, ANDF, ORP, or ORF instruction programmed in the same

step is executed two or more times within one operation cycle

When LDP, LDF, ANDP, ANDF, ORP or ORF instruction programmed in the same step is executed two or more times

within one operation cycle, the following operation results:



• Program between FOR and NEXT instructions

• Program which executes the same subroutine program from two or more

CALL instructions during one operation cycle

• Program which jumps to a label (P) in a smaller step number by CJ

instruction



K



3



FNC 09

NEXT



When a device turns from OFF to ON

1st time: LDP, ANDP or ORP instruction turns ON.

2nd time and later: When the device status is the same as the time when the instruction was executed last, the

instruction turns OFF.



2)



When a device turns OFF from ON

1st time: LDF, ANDF or ORF instruction turns ON.

2nd time and later: When the device status is the same as the time when the instruction was executed last, the

instruction turns OFF.



4

Devices

in Detail



1)



Instruction

List



Operation



X000



FNC 08

FOR



2

Overview



Programs executed two or more times



Introduction



Cautions



2. Cautions on writing during RUN

1)



Instructions for rising edge pulse

When writing is completed during RUN for a circuit including an instruction for rising edge pulse, the instruction for

rising edge pulse is executed if a target device of the instruction for rising edge pulse or the operation condition

device is ON.

Target instructions for rising edge pulse: LDP, ANDP, ORP, and pulse operation type applied instructions (such

as MOVP)



Instruction for rising edge pulse



Instruction for falling edge pulse



OFF



Not executed



Not executed



ON



Executed*1



7

Basic

Instruction



Contact ON/OFF status

(while writing is executed during RUN)



6

Before

Programming



2)



5

Specified the

Device &

Constant



Instructions for falling edge pulse

When writing is completed during RUN for a circuit including an instruction for falling edge pulse (LDF, ANDF, or

ORF instruction), the instruction for falling edge pulse is not executed regardless of the ON/OFF status of the

target device of the instruction for falling edge pulse.

When writing is completed during RUN for a circuit including an instruction for falling edge pulse (PLF instruction),

the instruction for falling edge pulse is not executed regardless of the ON/OFF status of the operation condition

device.

It is necessary to set to ON the target device or operation condition device once and then set it to OFF for

executing the instruction for falling edge pulse.



Not executed



PLS instruction is not executed.



FNC00-FNC09

Program Flow



*1.



8



9

FNC10-FNC19

Move & Compare



10

FNC20-FNC29

Arith. & Logic

Operation



199



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



7.6



7.6 ORB



ORB



Outline

A circuit in which two or more contacts are connected in series is called serial circuit block.



1. Instruction format

Basic Instruction



ORB



1 step



Mnemonic



ORB

−



OR Block



Operation Condition

Continuous

Operation

Pulse (Single)

Operation



2. Applicable devices

Bit Devices

Instruction



Word Devices



System User



Digit Specification



System User



X Y M T C S D .b KnX KnY KnM KnS T

ORB



Others

Special

Unit



C D R U \G



Index

V



Constant



Z Modify K



Real

CharacPointer

Number ter String



H



E



" "



P



There are no applicable devices.



Explanation of function and operation

1. ORB instruction (parallel connection of multiple contact circuits)

When connecting serial circuit blocks in parallel, use LD or LDI instruction at the start of branch, and use ORB

instruction at the end of branch.

ORB instruction is an independent instruction not associated with any device number in the same way as ANB

instruction described later.

When there are many parallel circuits, ORB instruction can be used for each circuit block to connect them.

Circuit program

X000



List program



X001

Y006

ORB instruction



X002



X003



ORB instruction



X004



Appropriate program

0000 LD

X000

0001 AND X001

0002 LD

X002

0003 AND X003

0004 ORB

0005 LDI X004

0006 AND X005

0007 ORB

0008 OUT Y006



Inappropriate program

0000 LD

X000

0001 AND X001

0002 LD

X002

0003 AND X003

0004 LDI X004

0005 AND X005

0006 ORB

0007 ORB

0008 OUT Y006



X005



Serial circuit block



Caution

There is no limitation in the number of parallel circuits which can be connected by ORB instructions (in the case of

appropriate program shown above).

Though ORB instructions can be used at one time, note that the repeated use of LD or LDI instruction is limited to 8 or

less (in the case of inappropriate program shown above).



200



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



1



ANB



Introduction



7.7



7.7 ANB



Outline



1. Instruction format

Basic Instruction



ANB



1 step



Mnemonic



ANB



3

Instruction

List



−



AND Block



Operation Condition

Continuous

Operation

Pulse (Single)

Operation



2. Applicable devices

Bit Devices



Word Devices



System User



Digit Specification



System User



X Y M T C S D .b KnX KnY KnM KnS T

ANB



Others

Special

Unit



C D R U \G



Index

V



Constant



Z Modify K



H



Real

CharacPointer

Number ter String

E



" "



P



There are no applicable devices.



Explanation of function and operation



5



ANB

X000



List program



LD

X002



X003

Y007



X004



X005



X006



Parallel block



LD

OR

LD

AND

LDI

AND

ORB

OR

ANB

OR

OUT



X000

X001

X002

X003

X004

X005



6



Branch start point



Parallel block is completed.

X006

X003

Y007



7



It is connected to the

preceding circuit in series.



Basic

Instruction



X003



ORB



0000

0001

0002

0003

0004

0005

0006

0007

0008

0009

0010



Before

Programming



X001



Specified the

Device &

Constant



1. ANB instruction (serial connection of multiple parallel circuits)

Circuit program



4

Devices

in Detail



Instruction



2

Overview



Use ANB instruction to connect a branch circuit (parallel circuit block) to the preceding circuit in series.

Use LD or LDI instruction at the start of branch. After completing a parallel circuit block, connect the parallel circuit

block to the preceding circuit in series by ANB instruction.

When there are many parallel circuits, ANB instruction can be used in each circuit block to connect them.



OR instruction before ANB instruction

OR instruction after ANB instruction



8



There is no limitation in the number of ANB instruction.

Though ANB instructions can be used at one time, note that the repeated use of LD or LDI instruction is limited to 8 or

less in the same way as ORB instruction.



FNC00-FNC09

Program Flow



Caution



9

FNC10-FNC19

Move & Compare



10

FNC20-FNC29

Arith. & Logic

Operation



201



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



7.8



7.8 MPS, MRD, MPP



MPS, MRD, MPP



Outline

FX3G, FX3U FX3GC and FX3UC PLCs have 11 memories called "Stack" which store the intermediate result (ON or OFF)

of operations.



1. Instruction format

Basic Instruction



MPS



1 step

Memory Point Store



−

Basic Instruction



MRD



1 step



Mnemonic



MRD

−



Memory Read



Basic Instruction



MPP



Mnemonic



MPS



1 step



Mnemonic



MPP

−



Memory POP



Operation Condition

Continuous

Operation

Pulse (Single)

Operation



Operation Condition

Continuous

Operation

Pulse (Single)

Operation



Operation Condition

Continuous

Operation

Pulse (Single)

Operation



2. Applicable devices

Bit Devices

Instruction



Word Devices



System User



Digit Specification



System User



X Y M T C S D .b KnX KnY KnM KnS T



Others

Special

Unit



Index



C D R U \G



V



MPS



H



E



" "



P



There are no applicable devices.



MPP



Z Modify K



Real

CharacPointer

Number ter String



There are no applicable devices.



MRD



Constant



There are no applicable devices.



Explanation of function and operation

These instructions are convenient in programming branched multi-output circuits.



1. MPS, MRD, and MPP instructions (stores the current result of the internal PLC operations, reads

the current result of the internal PLC operations, and pops (recalls and removes) the currently

stored result)

18



MPS

X004 X005

X006

MRD

MRD

MPP



Y002

Y003

Y004



X007



Y005



0018

0019

0020

0021

0022

0023

0024

0025

0026

0027

0028

0029

0030



LD

MPS

AND

OUT

MRD

AND

OUT

MRD

OUT

MPP

AND

OUT

END



X004

X005

Y002



1

2

3



X006

Y003

Y004

X007

Y005



[2]

[1]



MPP

MRD

MPS

MPP



10

11

Stack



• Use MPS instruction to store the intermediate result of operation, and then drive the output Y002.

• Use MRD instruction to read the stored data, and then drive the output Y003.

MRD instruction can be programmed as many times as necessary.

• In the final output circuit, use MPP instruction instead of MRD instruction.

MPP instruction reads the stored data described above, and then resets it.



Error

MPS instruction can be used two or more times.

However, the difference between number of MPS instructions and the number of MPP instructions should be 11 or

less, and should be 0 at the end.



202



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



7.8 MPS, MRD, MPP



1



1)



Introduction



Program examples

Program example 1: One stack

Only one stack is used in this example.

Circuit program



List program

MPS



X001



X002

Y000

Y001

MPP



MPS

X004

Y002

X005

Y003

MPP



X006



X007

Y004

X010

Y005

X011



MRD



X012



Y006

Y007



2)



3



Y001

X003

X004

Y002



4



X005

Y003

X006

X007

Y004



5



X010

Y005

X011

Y006



6



X012

Y007



Before

Programming



MPP



X002

Y000



Specified the

Device &

Constant



MRD



2



X000

X001



Devices

in Detail



MPS



LD

AND

MPS

AND

OUT

MPP

OUT

LD

MPS

AND

OUT

MPP

AND

OUT

LD

MPS

AND

OUT

MRD

AND

OUT

MRD

AND

OUT

MPP

AND

OUT



Instruction

List



X003



0000

0001

0002

0003

0004

0005

0006

0007

0008

0009

0010

0011

0012

0013

0014

0015

0016

0017

0018

0019

0020

0021

0022

0023

0024

0025

0026



Overview



X000



Program example 2: One stack with ANB and ORB instructions

Circuit program



List program



MPS



7



X001

Y000

X002

X003



X004

Y001



X005



X006



X007

Y002

MPP



X010

X011



X000

X001

X002



8



Y000

X003

X004

X005

X006



9

FNC10-FNC19

Move & Compare



Y003



Y001

X007

Y002

X010

X011



10

FNC20-FNC29

Arith. & Logic

Operation



LD

MPS

LD

OR

ANB

OUT

MRD

LD

AND

LD

AND

ORB

ANB

OUT

MPP

AND

OUT

LD

OR

ANB

OUT



FNC00-FNC09

Program Flow



MRD



0000

0001

0002

0003

0004

0005

0006

0007

0008

0009

0010

0011

0012

0013

0014

0015

0016

0017

0018

0019

0020



Basic

Instruction



X000



Y003



203



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition

3)



7.8 MPS, MRD, MPP



Program example 3: Two stacks

Circuit program

X000



List program



X001



X002

Y000



MPS



X003



MPS



Y001



MPP

X004



X005

Y002



MPP



X006



MPS



Y003



MPP



4)



0000

0001

0002

0003

0004

0005

0006

0007

0008

0009

0010

0011

0012

0013

0014

0015

0016



LD

MPS

AND

MPS

AND

OUT

MPP

AND

OUT

MPP

AND

MPS

AND

OUT

MPP

AND

OUT



X000

X001

X002

Y000

X003

Y001

X004

X005

Y002

X006

Y003



Program example 4: Four stacks

Circuit program

MPS

X000



List program



MPS



X001



MPS



X002



MPS



X003



X004

Y000

Y001



MPP

Y002

MPP

Y003



0000

0001

0002

0003

0004

0005

0006

0007

0008



LD

MPS

AND

MPS

AND

MPS

AND

MPS

AND



0000

0001

0002

0003

0004

0005

0006

0007

0008

0009



LD

OUT

AND

OUT

AND

OUT

AND

OUT

AND

OUT



X000

X001

X002

X003

X004



0009

0010

0011

0012

0013

0014

0015

0016

0017



OUT

MPP

OUT

MPP

OUT

MPP

OUT

MPP

OUT



Y000

Y001

Y002

Y003

Y004



MPP

Y004

MPP



X000

Y004

X001

Y003

X002

Y002

X003

Y001

X004



X000

Y004

X001

Y003

X002

Y002

X003

Y001

X004

Y000



Y000



In programming a circuit on the upper side, it is necessary to MPS instruction three times.

By changing the circuit on the upper side into the circuit on the lower side, the same contents can be programmed

easily without MPS instruction.



204



FX3S/FX3G/FX3GC/FX3U/FX3UC Series



7 Basic Instruction



Programming Manual - Basic & Applied Instruction Edition



1



MC, MCR



Introduction



7.9



7.9 MC, MCR



Outline



2

Overview



When MC instruction is executed, the bus line (LD or LDI point) is moved to a position after MC contact.

The bus line can be returned to the original position by MCR instruction.

By changing a device (Y or M) number, MC instruction can be used as many times as necessary.

If the same device number is used twice, however, it results in the double coil operation in the same way as OUT

instruction.



1. Instruction format

Basic Instruction



MC



Mnemonic



−



Master Control

Basic Instruction



MCR



2 steps



Mnemonic



MCR



Operation Condition

Continuous

Operation

Pulse (Single)

Operation



4



→ For the number of steps of MC instruction, refer to Section 7.16.



Devices

in Detail



−



Master Control

Reset



3



Operation Condition

Continuous

Operation

Pulse (Single)

Operation



Instruction

List



MC



2. Applicable devices

Bit Devices



Word Devices



System User



Digit Specification



System User



X Y M T C S D .b KnX KnY KnM KnS T



Others

Special

Unit



C D R U \G



Index

V



Constant



Z Modify K



H



Real

CharacPointer

Number ter String

E



" "



P



MC

MCR



There are no applicable devices.



6



: Except special auxiliary relays (M)



1. MC and MCR instructions (denotes the start of a master control block and denotes the end of a

master control block)



MC



N 0



M100

X001



M100



Y000



X002



Y001

N 0



0004

0005

0006

0007

0008



LD

MC

SP

LD

OUT

LD

OUT

MCR



9



X000

N000

Three-step instruction

M100

X001

Y000

X002

Y001

N 0 ← Two-step instruction



10

FNC20-FNC29

Arith. & Logic

Operation



MCR



0000

0001



FNC10-FNC19

Move & Compare



N0



List program



8

FNC00-FNC09

Program Flow



Circuit program



7

Basic

Instruction



When MC instruction is executed, the bus line is moved to a position after MC contact.

Drive instructions connected to the bus line after the MC contact execute each operation only when the MC instruction

is executed, and execute each operation in the contact OFF status regardless of the contact status before drive

instructions when a MC instruction is not executed. If an instruction (such as FOR/NEXT, EI and DI instruction) not

requiring a contact instruction exists in a circuit using master control, such an instruction is executed regardless of the

MC instruction execution command.

In the program example below, the instructions from MC to MCR are executed as they are while the input X000 is ON.

However, while the input X000 is OFF, each driven device offers the following operation:

Timers (except retentive type timers) and devices driven by OUT instruction: Turn OFF.

Retentive type timers, counters and devices driven by SET/RST instruction: Hold the current status.

The expressions of circuit programs used to explain operations are circuits (for reading or monitoring) of GX Works2

and GX Developer.



Before

Programming



Explanation of function and operation



X000



5

Specified the

Device &

Constant



Instruction



← Write MCR N0 instruction.



205