FX3U Series Programmable Controllers
User's Manual - Hardware Edition
83
5 Version Information and Peripheral Equipment Connectability
5.2 Programming Tool Applicability
1
Introduction
2
Features and
Part Names
3
Product
Introduction
4
Specifications
5
Version and
Peripheral
Devices
6
System
Configuration
7
Input/Output
Nos., Unit Nos.
8
Installation
9
Preparation and
Power Supply
Wiring
10
Input Wiring
Circuit blocks which require attention on
operation after write during RUN
When writing to a circuit block during RUN, which includes the following
instructions, the following results.
• MEP instruction (Conversion of operation result to leading edge pulse
instruction)
When completing Write during RUN to a circuit including the MEP
instruction, the execution result of the MEP instruction turns ON (conducting
state) if the operation result up to the MEP instruction is ON.
• MEF instruction (Conversion of operation result to trailing edge pulse
instruction)
When completing Write during RUN to a circuit including the MEF
instruction, the execution result of the MEF instruction turns OFF
(nonconducting state) regardless of the operation result (ON or OFF) up to
the MEF instruction.
When the operation result up to the MEF instruction is set to ON once and
then set to OFF, the execution result of the MEF instruction turns ON
(conducting state).
Others
• When writing during RUN with GX Works2 Ver. 1.08J or later, GX
Developer Ver. 8.18U or later, the program is as follows.
When the number of program steps is reduced by deletion of contacts, coils
and applied instructions, the program capacity becomes smaller by as
many as the reduced number of steps.
•FX3U Ver. 3.00 or later, GX Works2 Ver. 1.62Q or later.
Writing during RUN is enabled only when the protection status (valid or
invalid) by the setting "Read-protect the execution program." for the
block password is same as the protection status of the PLC designated
as the target of writing during RUN.
Item Caution
Operation result up to
MEP/MEF instruction
MEP instruction MEF instruction
OFF OFF (nonconducting) OFF (nonconducting)
ON ON (conducting) OFF (nonconducting)
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