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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
4 Devices in Detail
4.1 Device Number List
1
Introduction
2
Overview
3
Instruction
List
4
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
4. Devices in Detail
This chapter explains how numeric values are handled in the PLC as well as the roles and functions of various built-in
devices including I/O relays, auxiliary relays, state relays, counters and data registers.
The following content provides a basis for handling the PLC.
4.1 Device Number List
Device numbers are assigned as shown below.
For input relay numbers and output relay numbers when I/O extension equipment and special extension equipment
are connected to the PLC main unit, refer to the Hardware Edition.
1) FX
3S PLC
Device name Description Reference
I/O relay
Input relay X000 to X017 16 points
Device numbers are octal. Section 4.2
Output relay Y000 to Y015 14 points
Auxiliary relay
General type
M0 to M383 384 points
Section 4.3EEPROM keep type M384 to M511 128 points
General type
M512 to M1535
1024 points
Special type
*1
M8000 to M8511
512 points Chapter 37
State relay
Initial state type
(EEPROM keep)
S0 to S9 10 points
Section 4.4
EEPROM keep type
S10 to S127 118 points
General type
S128 to S255 128 points
Timer (on-delay timer)
100 ms T0 to T31 32 points 0.1 to 3,276.7 sec
Section 4.5
100 ms/10 ms T32 to T62 31 points
0.1 to 3,276.7 sec/0.01 to 327.67 sec
They can be switched from 100 ms to 10 ms by
driving the special auxiliary relay M8028.
1 ms T63 to T127 65 points 0.001 to 32.767 sec
Retentive type for 1 ms
(EEPROM keep)
T128 to T131 4 points 0.001 to 32.767 sec
Retentive type for 100 ms
(EEPROM keep)
T132 to T137 6 points 0.1 to 3,276.7 sec
Counter
General type up counter
(16 bits)
C0 to C15 16 points Counts 0 to 32,767
Section 4.6
EEPROM keep type up
counter (16 bits)
C16 to C31 16 points Counts 0 to 32,767
General type
bi-directional counter
(32 bits)
C200 to C234 35 points −2,147,483,648 to +2,147,483,647 counts
*1. For applicable functions, refer to Chapter 37.
For handling of the latched area, refer to Section 2.6.