I/O Access Timing - Mitsubishi Electric MELSEC Q Series User Manual

17.2.2

I/O access timing

This section explains the input (X) and output (Y) data transfer timings of the C Controller module.
(1) Input (X) loading timing
The C Controller module loads input (X) data at one of the following timings.
• When a bus interface function (such as the md_RandREx, QBF_X_In_BitEx) is executed in the user
program
• When data refresh is executed
• When input (X) data are read out from a peripheral device
(When monitoring using the device monitor function of Setting/monitoring tool for the C Controller module.)
(2) Output (Y) writing timing
The C Controller module writes output (Y) data at one of the following timings.
• When a bus interface function (such as the md_RandWEx, QBF_Y_Out_BitEx) is executed in the user
program
• When data refresh is executed
• When output (Y) data are written from a peripheral device
(When monitoring using the device monitor function of Setting/monitoring tool for the C Controller module.)
r
Remark
For details of the bus interface functions, refer to the following.
 Page 356, CHAPTER 21
Note17.2
Q24DHCCPU-LS
The bus interface function is not supported by Q24DHCCPU-LS and Q26DHCCPU-LS.
The data refresh function is not supported by Q12DCCPU-V.
306
Note17.2
Note17.2
Q26DHCCPU-LS Q12DCCPU-V
Q24DHC-V Q24DHC-VG
Note17.2
Q24DHC-LS Q26DHC-LS Q12DC-V