User`s manual
245
CHAPTER 10 ON-DEMAND DATA COMMUNICATIONS USING USER FRAMES
10
10.3 User Frame On-Demand Data Transmission and Buffer Memory Used
• On-demand data list
The following shows the user frame designation on-demand data list.
• Only the on-demand data list combinations shown below can be used.
: Designation data
• The send data for on-demand data transmission by user frame is listed below. (See Page 220, CHAPTER 9 for a
detailed description of user frame.)
*1 Refer to the MELSEC Communication Protocol Reference Manual for details.
Combination
Data name
First frame (1st) First frame (2nd) Send data Last frame (1st) Last frame (2nd)
1)
2)
3)
4)
5)
6)
7)
8)
Contents of send data ASCII mode Binary mode
User frame
First frame (1st)
Last frame (Last frame)
Codes registered from 00H to
FEH
Transmit the data of the code registered in the Q series C24. (No
conversion)
Combination of codes registered
in FFH and 00H to FFH
Transmit the data according to the user-designated contents, code,
and byte count.
User frame
First frame (2nd)
Last frame (Other than last
frame)
Codes registered from 00H to
FEH
Converts the data code
registered in the Q series C24 to
ASCII data and transmits.
Transmits data code registered in
the Q series C24.
For 10H data, transmits 10H +
10H.
Combination of codes registered
in FFH and 00H to FFH
Converts data of the contents,
code, and byte count designated
by the user to ASCII data and
transmits.
Transmits the data of the
contents, code, and byte count
designated by the user.
For 10H data, transmits 10H +
10H.
Send data
*1
Converts the designated send
data to ASCII data and transmits.
Transmits the designated data
unchanged. (No conversion)
For 10H data, transmits 10H +
10H.
Send data
User frame
On-demand data
Transmitted when last frame (2nd) designated.
Transmitted when last frame (1st) designated.
On-demand instruction/transmitted when send
data designated in buffer memory.
Transmitted when first frame (2nd) designated.
First frame (1st).
User frame User frame User frame