Fuji Electric Monitouch S8 series, Connection Manual

Page: 353 / 406

23-18 23. Universal Serial Communication
23.4.3 Command
RC: Read CHR
This command is used to read data memory as characters.
* When character data is sent, 1 character (1 byte) is converted into a two-byte ASCII code and transmitted by the read
memory command. When the read CHR command is given, character data is not converted into the ASCII code before
transmission, and thus, the transmission time is decreased by approximately 1/2.
Details of read CHR
Example:
Call up 4 characters that are written at the top of the address $u0020 (0014H).
• Host side
DLE: When the data to be read is not continuous, “DLE” is inserted as a delimiter between the breaks.
There should be no more than 5 DLEs.
Address: Top address of the data memory to be read (HEX ASCII)
Count:
Number of characters to be read (HEX ASCII)
• S8 series side
Address and count are omitted and DLE and data are transmitted. The read sequence is the same as the
command sequence (HEX ASCII).
㧿
㨀
㨄
RC
㧰
㧸
㧱
㧰
㧸
㧱
㧱
㨀
㨄
㧿
㨁
㧹
㧿
㨀
㨄
㧰
㧸
㧱
㧰
㧸
㧱
㧱
㨀
㨄
㧿
㨁
㧹
Address
Count
Address
Count
Memory data Memory data
Read CHR command
Host side
S8 series side
Transmission data
Transmission data
㧿
㨀
㨄
0 0 1 4
RC
㧰
㧸
㧱
㧱
㨀
㨄
㧿
㨀
㨄
㧰
㧸
㧱
㧱
㨀
㨄
0 0 0 4
10
H
43
H
52
H
02
H
03
H
33
H
33
H
3 3
A B C D
10
H
02
H
03
H
46
H
31
H
1 F
30
H
30
H
34
H
31
H
30
H
30
H
34
H
30
H
42
H
41
H
44
H
43
H
Host side
S8 series side
The character codes “41H” (for “A”), “42H” (for “B”),
“43H” (for “C”), and “44H” (for “D”) are sent from the
S8 series as shown below.