1] read free memory size, 2] monitor tmr, cnt, and md, 1] read free memory size -4 – Sharp JW-21MN User Manual
Page 43: 2] monitor tmr, cnt, and md -4, Symbol data details, Symbol data details cmd 43, Function code sub 4d, Sub code m 03
10-4
[1] Read free memory size
Read free memory size.
[Write mode assignment]: None
[Communication format]
Command
Response
Ex. When reading the amount of free program memory (up to 7.5 k words). The data in the cells are
hexadecimal numbers.
Command
Response
[2] Monitor TMR, CNT, and MD
Read out the current value and attributed data from TMR, CNT, and MD in the specified area.
[Write mode assignment]: None
[Communication format]
Command
Response
(See page 10-3 for other symbols not described above)
[Ex.] Read the current value of TMR, CNT, and MD at addresses 000 to 002
(8)
(The data in cells are in hexadecimal notation)
Command
Response
"+"
"C"
"L"
"A"
CMD
SUB
ATTR
"+"
ACK
"C"
"L"
"A"
CMD
SUB
ATTR
MODE
2B
43
4C
41
43
4D
00
"+"
"C"
"L"
"A"
CMD
SUB
ATTR
2B
00
43
4D
41
43
4D
00
07
ACK
CMD
SUB
7.5k word
Symbol
Data
Details
TA1
to
TAN
00
(H)
Not used as TMR,
CNT, or MD
Data 1 bytes
x
Number of reading
data
01
(H)
ZW/JW MD
02
(H)
ZW CNT
04
(H)
ZW TMR
08
(H)
DTMR (BCD)
09
(H)
DTMR (BIN)
0A
(H)
UTMR (BCD)
0B
(H)
UTMR (BIN)
0C
(H)
DCNT (BCD)
0D
(H)
DCNT (BIN)
0E
(H)
UCNT (BCD)
0F
(H)
UCNT (BIN)
Symbol
Data
Details
CMD
43
(H)
Function code
SUB
4D
(H)
Sub code
M
03
(H)
Program memory capacity: 3.5 k words
07
(H)
Program memory capacity: 7.5 k words
07
(H)
Program memory capacity: 15.5 k words
07
(H)
Program memory capacity: 31.5 k words
(Symbols other than the
left: See page 10-3.)
2B
43
4C
41
42
23
00
00
00
03
00
"+"
"C"
"L"
"A"
CMD
SUB
ATTR
000
(8)
3 pieces
2B
00
43
4C
41
42
23
00
00
00
03
00
ACK
CMD
SUB
ATTR
000
(8)
3 pieces
65
38
32
60
14
73
08
0C
0E
No. 000
Current value:
3865
No. 001
Current value:
6032
No. 002
Current value:
7314
DTMR
000
(BCD)
DCNT
001
(BCD)
UCNT
002
(BCD)
"+"
"C"
"L"
"A"
CMD
SUB
ATTR
TMR.NO.
N
"+"
ACK
"C"
"L"
"A"
CMD
SUB
ATTR
TMR.NO.
N
D1
DN
TA1
TAN
Symbol
Data
Details
CMD
42
(H)
Function code
SUB
23
(H)
Sub code
TMR NO
When JW20/JW20H is
used: 000 to 777
(8)
TMR, CNT, MD number
(in order of 2 bytes data,
L and H.)
When JW30H is used:
0000 to 7777
(8)
(TMR, CNT, MD)
1000 to 1777
(8)
(TMR, CNT)
N
0000 to 0100
(8)
Number of reading data
(in order of 2 bytes data,
L and H.)
D1 to DN
See the example
Reading current value
data
(Data 2 bytes x number
of reading data)