Mitsubishi FX3U Series User Manual

FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
437
22 FX3U-32BL (Battery)
22.1 Battery Purpose
21
Memory Cassette
22
Battery
A
Special Devices (M8000-,D8000-)
B
Instruction List
C
Character-code
D
Discontinued models
22. FX3U-32BL (Battery)
The main unit of the PLC has a built-in battery.
When the battery voltage drops, the BATT LED lights, and the special auxiliary relay (M8005 or M8006) turns
on. In this case, replace the battery FX
3U-32BL.
22.1 Battery Purpose
The battery is required to retain (backup) program memory and "keep device" data and maintain clock
operation in the event of a power outage.
22.2 Specifications
22.2.1 Differences between main unit’s internal battery and the optional battery
Although the optional battery (FX3U-32BL) serves as the same as the main unit’s internal battery, they differ in
the ways described below.
They may also have different external colors due to dates of manufacture.
STARTUP AND MAINTENANCE
PRECAUTIONS
• Turn off the power to the PLC before attaching or detaching the memory cassette. If the memory cassette is
attached or detached while the PLC's power is on, the data in the memory may be destroyed, or the memory
cassette may be damaged.
TRANSPORTATION PRECAUTIONS
• Before transporting the PLC, turn on the power to the PLC to check that the BATT LED is off.
If the PLC is transported with the BATT LED on or the battery exhausted, the battery-backed data may be
unstable during transportation.
Data Retained By Backup Battery
Program memory Internal RAM parameters, programs, device comments, file registers
Device memory
• Auxiliary relay, state (for annunciator included), timer (cumulative type), counter, data
register keep device
• Extended register
• Sampling trace result
Current time Current time clock
Item Specifications Remarks
Nominal voltage 3V Battery voltage can be monitored with PLC data register D8005.
Main Unit Internal Battery Optional Battery (Spare)
External
appearance
A nameplate label indicating the product model
and lot No. is affixed.
Warranty
period
1 year from delivery or 18 months from date of
manufacture, with reference to the main unit’s
manufacture No.
1 year from delivery or 18 months from the date
of manufacture, with reference to the lot No.
Connector
0
4
1
0
0
1
0
4
1
0
0
1
Connector
FX 3U -32BL
LOT.44
Nameplate
............

Mitsubishi FX3U Series Specifications

General

Model	FX3U Series
Program Memory	64k steps
Execution Speed	0.065 μs/basic instruction
Type	PLC (Programmable Logic Controller)
Power Supply	100-240V AC
I/O Points	Up to 384
Communication	USB
Expansion	Supported via expansion modules
High-Speed Counters	Up to 6 channels
Analog Input/Output	Available via expansion modules
Temperature Range	0 to 55°C
Programming Language	Ladder Logic, Structured Text
Built-in Functions	PID control
Humidity	5 to 95% (non-condensing)