Devices In Detail; Device Number List - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
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 FX
1) FX /FX
3U 3UC
Device name
I/O relay
Input relay
Output relay
Auxiliary relay
General type [variable]
Latched (battery backed)
type [variable]
Latched (battery backed)
type [fixed]
*2
Special type
State relay
Initial state (general type
[variable])
General type [variable]
Latched (battery backed)
type [variable]
Annunciator
(latched (battery backed)
type [variable])
Latched (battery backed)
type [fixed]
Timer (on-delay timer)
100 ms
100 ms [for subroutine or
interrupt routine]
10 ms
Retentive type for 1 ms
Retentive type for 100 ms T250 to T255
1 ms
84
PLC
*1
X000 to X367
*1
Y000 to Y367
M0 to M499
M500 to M1023
M1024 to M7679
M8000 to M8511
S0 to S9
S10 to S499
S500 to S899
S900 to S999
S1000 to S4095
T0 to T191
T192 to T199
T200 to T245
T246 to T249
T256 to T511
Hardware Edition.
3U
Description
Device numbers are octal.
248 points
The total number of inputs and outputs is
248 points
256.
500 points
The setting can be changed between the
latched (battery backed) type and the non-
524 points
latched type using parameters.
6656 points
512 points
10 points
490 points
The setting can be changed between the
latched (battery backed) type and the non-
400 points
latched type using parameters.
100 points
3096 points
192 points 0.1 to 3,276.7 sec
8 points 0.1 to 3,276.7 sec
46 points 0.01 to 327.67 sec
4 points 0.001 to 32.767 sec
6 points 0.1 to 3,276.7 sec
256 points 0.001 to 32.767 sec
4 Devices in Detail
4.1 Device Number List
Reference
Section 4.2
Section 4.3
Chapter 37
Section 4.4
Section 4.5