Appendix 2 Reading From And Writing To The Buffer Memory - Mitsubishi MELSEC Q Series Reference Manual

Appendix 2 Reading from and Writing to the Buffer Memory

No.
External device
Access-1
(1) connection
(local station)
station
External device
Access-2
(2) connection
(local station)
station
(3)
Access-3
Station on
(other station)
CC-Link IE
(4)
Controller
Network,
CC-Link IE Field
(5)
Network,
Access-4
MELSECNET/H,
(other station)
MELSECNET/10 AnU compatible
(6)
APPX - 17
This section explains functions used by an external device to read or write data in the
buffer memory of an intelligent function module (including special function modules)
loaded on a Q/LCPU station on which the C24/E71 is loaded (local station), or on a
programmable controller station without the C24/E71 in a network system (other
station).
The following table outlines the programmable controller stations whose intelligent
function module buffer memory can be read/written in, the functions used, and their
commands.
The following table lists the target stations and modules of Access-1 to Access-4 and
the target functions/commands of method of read/write.
Read/write target
Target station Target module
Q/LCPU station
C24/E71
Q compatible
remote I/O station
Intelligent function
Q/LCPU station
module
(Excluding the
Q compatible
C24/E71)
remote I/O station
Q/L/QnACPU
station
QnA compatible
remote I/O station Intelligent function
module
Programmable
(Including the
controller CPU
C24/E71)
station other than
Q/QnACPU
remote I/O station
(1) Target station and modules in Access-1 to Access-6 shown in the
table
• Access-1 (local station)
1) The C24/E71 connected to an external device, and the C24 linked with
such C24 using the multi-drop connection
• Access-2 (local station)
2) An intelligent function module on a station where the C24/E71
connected to an external device is loaded, and an intelligent function
module on a station where the C24 linked with such C24 using the
multi-drop connection is loaded
• Access-3 (other station)
3) An intelligent function module loaded on a Q/L/QnACPU station on CC-
Link IE Controller Network, CC-Link IE Field Network, MELSECNET/H,
or MELSECNET/10
4) An intelligent function module loaded on a Q/QnA-compatible remote
I/O station on MELSECNET/H or MELSECNET/10
• Access-4 (other station)
5) An intelligent function module loaded on a programmable controller
CPU station (other than the Q/QnACPU) on MELSECNET/10
6) An intelligent function module loaded on an AnU-compatible remote I/O
station on MELSECNET/10
Method of read/write
QnA compatible 3E/3C/4C frames,
QnA extension
4E frame
designation
(appendix 1)
[0601], [1601]
: Can be designated
APPENDICES
Command for A
compatible 1E/1C
frames
[0613], [1613]
[OE], [OF], [TR], [TW]
: Cannot be designated
APPX - 17