Fx 3U -32Bl (Battery); Battery Purpose; Specifications; Differences Between Main Unit's Internal Battery And The Optional Battery - Mitsubishi FX3U SERIES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition
22. FX -32BL (Battery)
3U
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.
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
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.
Program memory
Device memory
Current time
22.2

Specifications

Item
Nominal voltage

22.2.1 Differences between main unit's internal battery and the optional battery

Although the optional battery (FX
the ways described below.
They may also have different external colors due to dates of manufacture.
External
appearance
1 year from delivery or 18 months from date of
Warranty
manufacture, with reference to the main unit's
period
manufacture No.
-32BL.
3U
Internal RAM parameters, programs, device comments, file registers
• Auxiliary relay, state (for annunciator included), timer (cumulative type), counter, data
register keep device
• Extended register
• Sampling trace result
Current time clock
Specifications
3V Battery voltage can be monitored with PLC data register D8005.
-32BL) serves as the same as the main unit's internal battery, they differ in
3U
Main Unit Internal Battery
Connector
0
Data Retained By Backup Battery
Remarks
Optional Battery (Spare)
A nameplate label indicating the product model
and lot No. is affixed.
FX
LOT.44
............
1 year from delivery or 18 months from the date
of manufacture, with reference to the lot No.
22 FX3U-32BL (Battery)
22.1 Battery Purpose
Connector
-32BL
3U
Nameplate
21
22
A
B
C
D
437