Data Refresh Function - Mitsubishi Electric MELSEC Q Series User Manual

11.7.1

Data refresh function

This function performs refreshing automatically between the devices of the C Controller module (X, Y, buffer memory)
and the data refresh memory.
Also, it issues an interrupt event when the data refresh memory value meets the specified condition.
User program
C Controller module devices for refreshing are listed below.
I/O device
Internal user device
Internal system device
Module access device
*1 : For bit device, specify a multiple of 16 at the beginning of the device.
*2 : The number of device points set in the device function ( Page 169, Section 11.6) parameter is the upper limit of the set range.
*3 : Some addresses are not readable/writable depending on applications and settings of the shared multiple CPU memory.
For details, refer to the following.
 Page 251, Section 14.1
*4 : Regardless of the parameter "Output mode at STOP to RUN" (to Previous State/Recalculate) setting, the output (Y) is refreshed by
the data refresh right after the status is changed from STOP to RUN.
To read from/write to the bit device, extract only desired bit information after read-out in words and read/write data.
C Controller module
Data
refresh memory
0x0000 to 0x00FF
0x0100 to 0x03FF
0x0400 to 0x05FF
Interrupt event
Device name
*1
Input
*1
Output
*1*2
Internal relay
*1*2
Link relay
*2
Data register
*2
Link register
Special relay
Special device
Intelligent function module device
*3
Multiple CPU shared memory
Q24DHC-V Q24DHC-VG
Device (setting No.1) Device (setting No.2)
Y D
Setting range
X0000 to 0FFF
Y0000 to 0FFF
M0 to 61439
B0000 to B9FFFF
D0 to 4184063
W0000 to FFFFF
SM0 to 2047
SD0 to 2047
Un\G0 to 65535
G0 to 4095
G10000 to 24335
CHAPTER 11 BASIC FUNCTIONS
Q12DC-V
Q24DHC-LS Q26DHC-LS
Device (setting No.3)
Un\G
Operation
Read
*4
Read/write
Read/write
Read/write
Read/write
Read/write
Read
Read
Read/write
Read/write
Read/write
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