Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual

253
CHAPTER 3 FUNCTIONS
3
3.29 Latch Data Backup to Standard ROM
3.29 Latch Data Backup to Standard ROM
This function holds (backs up) latch data, such as device data and error history, to the standard ROM without using a
battery when the system is stopped for a long period. This function helps to extend battery life.
Remark
When a CPU module other than the High-speed Universal model QCPU and Universal model Process CPU executes this
function, the battery life-prolonging function is enabled regardless of its parameter setting. The function is disabled after
backup data are restored.
The status of the function can be checked in SD119 (Battery life-prolonging factor).
For details of the battery life-prolonging function, refer to Page 249, Section 3.26.
(1) Backup target data and file size
The following table lists backup target data and sizes of files where data are stored.
Backup target data File size (byte)
Device data
• File register (R, ZR)
*1
• Extended data register (D)
*1
• Extended link register (W)
*1
64 + 2 × Number of file register points
• Internal user device (M, L, B, F, V, T, ST, C, D, W)
• Index register (Z)/standard device register (Z)
File sizes differ depending on the CPU module used.
*7
Error history
Module error collection file (stored in the system memory)
*3
File transfer error history
SFC program continuation start information
Sampling trace information
Scan time measurement information
Standard RAM system data
*4, *5
4
Standard RAM directory data
*4, *5
14212
Trace setting (Sampling trace file)
*6
16 + Sampling trace file size
Module error collection file (stored in the standard RAM)
92 + 64
× Maximum number of module errors
CPU module Serial No. (first 5 digits) File size (byte)
Q00UJCPU, Q00UCPU,
Q01UCPU
11042 or earlier 87210
11043 or later 89790
Q02UCPU
11042 or earlier 87210
11043 or later 93630
QnUD(H)CPU,
QnUDE(H)CPU
11042 or earlier 110890
11043 or later 117310
Q03UDVCPU
17011 or earlier 124952
17012 to 17102 132582
17103 or later 132608
18052 or later 132634
Q04UDVCPU,
Q04UDPVCPU,
Q06UDVCPU,
Q06UDPVCPU
17011 or earlier 144152
17012 to 17102 151782
17103 or later 151808
18052 or later 151834
Q13UDVCPU,
Q13UDPVCPU,
Q26UDVCPU,
Q26UDPVCPU
17011 or earlier 184728
17012 to 17102 192358
17103 or later 192384
18052 or later 192410

Mitsubishi Electric MELSEC-Q00U(J)CPU Specifications

General

Brand	Mitsubishi Electric
Model	MELSEC-Q00U(J)CPU
Category	Controller
Language	English