Direct Write (Command: 3C) - Mitsubishi Electric MELSEC IQ-R series Reference Manual

Direct write (command: 3C)

Write extended file register in 1-point (1 word) units by specifying the consecutive device number of extended file register.
This command is a dedicated command for AnACPU. (The command is equivalent to AnA/AnUCPU common commands of
1C protocol.)
Message format
The following shows the message format of the request data and response data of the command.
■Request data
Number of device
Device number
■Response data
There is no response data for this command.
Data specified by request data
■Device number
Specify the start address of the extended file register to be written. (Page 418 Device number)
■Number of device points
Specify the number of extended file registers to be written. (Page 402 Number of device points)
Specify '00H' when the number of device points is to 256 points.
■Fixed value
Fixed to '0'.
ASCII code
0 0
30 30
H H
■Data for the number of specified device points
Stored data for the number of device points to be written.
18 COMMUNICATING USING 1E FRAMES
430
18.5 Read and Write Extended File Register
Fixed Data for the number of
points value specified device points
Binary code
00
H