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5-17

MEP,MEF

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.2 Association Instructions

5

.2.4 Operation re

sult conver

sions (MEP,MEF)

Operation result conversions (MEP,MEF)

MEP,MEF

Function

(1) If operation results up to the MEP instruction are leading edge (from OFF to ON), goes ON 

(continuity status).
If operation results up to the MEP instruction are anything other than leading edge, goes 

OFF (non-continuity status).

(2) Use of the MEP instruction simplifies pulse conversion processing when multiple contacts are 

connected in series.

(1) If operation results up to the MEF instruction are trailing edge (from ON to OFF), goes ON 

(continuity status).
If operation results up to the MEF instruction are anything other than trailing edge, goes OFF 

(non-continuity status).

(2) Use of the MEF instruction simplifies pulse conversion processing when multiple contacts are 

connected in series.

Operation Error

(1) There are no operation errors associated with the MEP or MEF instruction.

Program Example

(1) A program which performs pulse conversion to the operation results of X0 and X1

[Ladder Mode]

[List Mode]

 

1. The MEP and MEF instructions will occasionally not function properly when 

pulse conversion is conducted for a contact that has been indexed by a 

subroutine program or by the FOR to NEXT instructions.  If pulse conversion is 

to be conducted for a contact that has been indexed by a subroutine program 

or by the FOR to NEXT instructions, use the EGP/EGF instructions.

2. Because the MEP and MEF instructions operate with the operation results 

immediately prior to the MEP and MEF instructions, the AND instruction should 

be used at the same position. The MEP and MEF instructions cannot be used 

at the LD or OR position.

Setting 

Data

Internal Devices 

R, ZR

J

\

U

\G

Zn

Constants

Other

Bit

Word

Bit

Word

––

––

MEP

MEF

Command

Command

Step

Instruction

Device