Usb Memory Port Specifications; Backup - Hitachi MICRO-EHV+ Applications Manual

Chapter 2 Specifications

2.12 USB memory port specifications

Interface
Connect to USB-HUB
Supported format
Max. USB memory size
Max. file size
Max. file name
Not allowed characters for file/directory name
Max. number of files in root directory
Max. simultaneous open file
N o t e

2GB USB memory of FAT16 is not recommended because access speed is not fast enough, which could
result in overload exception especially for WebV

To avoid contact failure due to vibration, be sure to use small type USB memory device as follows.

2.13 Backup

(1) Battery (optional)
Retentive data and RTC (realtime clock) data can be kept by MV-BAT battery as below.
Guaranteed value (MIN) @55C
(2) Capacitor
Retentive data can be kept for 12 hours (at 25
*: To keep the retentive data or RTC data for 12 hours, it is required to charge the capacitor by supplying power
to PLC for more than 20 minutes.
Table 2.11 USB memory port specifications
Item
Battery life (Total power failure time)[year]
5
USB2.0 Full Speed (12M)
FAT32 (Recommended), FAT16
(2GB USB memory of FAT16 is not recommended because
access speed is not fast enough.)
32GB (FAT32), 2GB (FAT16)
2GB
99 characters (ASCII only, Unicode is not supported.)
¥ / : * ?  < >
7281
10
sualization.
i
Actual value (MAX) @25C
10
C
) by a built-in capacitor.
2 – 14
Specifications
Not supported