Sharp JW-21MN manual Optional commands, 10-3, Communication format, basic pattern

10-3 Optional commands

The JW-21MN optional commands are any commands not specified in the ME-NET specifications. These are commands specific to the JW-21MN. The host computer may use these optional commands for communication between JW-21MNs and PCs (JW20/JW20H/JW30H) with a JW-21MN installed. The table below shows optional commands (1) to (19) for the JW-21MN.

		Optional command	Reference page
[1]	Read free memory size		10-4
[2]	Monitor TMR, CNT, and MD		10-4
[3]	Reading PC mode		10-5
[4]	Setting PC mode		10-5
[5]	Reading system memory		10-6
[6]	Writing system memory		10-6
[7]	Reading date		10-7
[8]	Setting date		10-7
[9]	Reading time		10-8
[10]		Setting time	10-8
[11]		Correct clock time	10-9
[12]		Monitor step status	10-9
[13]		Read the optional parameters	10-10
[14]		Set the optional parameters	10-10
[15]		Read the special I/O parameters	10-11
[16]		Set the special I/O parameters	10-11
[17]		Set the secret function	10-12
[18]		Release the secret function, register a password	10-12
[19]		Check the secret status	10-13

[Communication format, basic pattern]

Command

"+" "C" "L" "A" CMD SUB ATTR C.TEXT

Response (normal)

JW20/JW20H only

JW30H only

10

"+" ACK "C" "L" "A" CMD SUB ATTR C.TEXT

- Response on error: See page 10-14.

Symbol	Data	Details
"+"	2B(H)	Optional command
"C"	43(H)	SHARP manufacturer
"L"	4C(H)	Identification code
"A"	41(H)	Model code (PC)
CMD	*1	Function code
SUB	*2	Sub code
ATTR	00(H)	Always set to 00(H)
C.TEXT	*3	Assignment detail of
R.TEXT		each optional code
ACK	00(H)	Response (when normal)

*1, *2, and *3 See each optional command (10-4 to 10-13)

10-3