Mitsubishi FX3U-16CCL-M User Manual

6 Introduction of Functions
6.3 RAS Function
60
FX3U-16CCL-M User's Manual
6.3.6 Consistency control function
Use these buffer memory addresses for consistency control to send or receive link data composed of 1 word
(16 bits) or more or 2 words (32 bits) or more.
These buffer memory addresses assure data consistency for 1 word (16 bits) or more when read or written by
the FROM/TO instructions, or data consistency for 2 words (32 bits) or more when read or written by the
DFROM/DTO instructions.
Consistency control operation examples and a sequence program example are as follows:
1. Explanation of RX and RWr consistency flag operation
BFM No.
Description Explanation
Hex. Dec.
#DCH #220 RX area consistency flag Consistency control
1: Consistency accessibility start
Set the latest data, and stop the buffer memory from being refreshed.
0: Data consistency accessibility is completed or not used.
("0" is the initial value.)
Refresh the communication data and buffer memory as required.
(When a device changes from "1" to "0", the unit resumes refreshing the
communication data and buffer memory.)
When any other number is set, these devices do not control the
consistency in the same way as "0".
#DDH #221 RY area consistency flag
#DEH #222 RWw area consistency flag
#DFH #223 RWr area consistency flag
RX area consistency flag
RWr area consistency flag
RX area data area
RWr area data area
Receive data
with refresh
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
BFM
TO instruction (K1)
BFM
BFM
BFM
BFM
BFM
Buffer memory
TO instruction (K1)
Receive data
with refresh
TO instruction (K0)
Resume
receiving data
with refresh
Receive data
with refresh
The unit refreshes
to obtain the latest
data in accordance
with the consistency
flag, and then stops
refreshing.

Mitsubishi FX3U-16CCL-M Specifications

General

Brand	Mitsubishi
Model	FX3U-16CCL-M
Category	Controller
Language	English