Sharp JW-21MN [2]Data link (Save memory function)

(2)Register link

Mainly used for sending and receiving numerical data.

[Example] In the case of sending 1 byte data from a master station and slave station 01 and 02.

	Master station (PC00)					Slave station (PC01)						Slave station (PC02)
０９２００																：Send
０９２０１
																：Receive
０９２０２
						Register							Register
	F-00			ｺ0000	09200		09200							09200
		Register											Register
			09201						F-00	ｺ0000	09201			09201
		Register						Register
			09202						09202						F-00	ｺ0000	09202

-The register link of the sending station may be used as D (Destination) side of the application instruction of the PC program.

-The register link of the receiving station may be used as S (Source) side of the application instruction of the PC program.

[2]Data link (Save memory function)

The save memory function is to provide a part of the data link area in the slave station data memory as

9a receiving area. A slave station can receive only the required area by relay link/register link so that the slave stations can save on use of the memory area.

As this function can unify the receiving area address and the sending area address of each slave station, the same program can be used for each slave station. Mixed allocation of the addresses with the data link (standard function) is also possible.

			Slave station "n" (JW-21MN: Set to save memory function)
		：Send	Memory inside	Top address of	Memory inside
Top address of Master station 00		：Receive		slave station	control module
master station			JW-21MN	"n" link area		Available setting
link area	Number of offset bytes of					each slave station*
	slave station "n"
Number of							V2
						Number of sending
sending bytes of
	Address
the master station						bytes of slave
Receiving area		Top address of slave station				station "n"
		"n" link area
from slave station		＋
1 to (n to 1)		Number of sending bytes			Addresses are allocated as
		of slave station "n"			receiving and sending alternately
Receiving area
from slave station
"n"

-Top address of receiving area in a slave station shall be set by the number of offset bytes from the link area's top. (0 ≤ Number of offset bytes ≤ total number of bytes of link area)

Setting item			Set location
Top address of master station link area
Number of sending bytes of the master station			Master station’s parameter
Number of offset bytes of slave station
Number of sending bytes of the slave station
Top address of slave station link area			Module No. switch of slave station
Number of receiving bytes of slave station		*	Slave station's parameter
	V2

*When JW-21MNs without 30Hn mark and 30H mark are used, these cannot set each slave station.

Automatically allocated with the same number of the sending bytes of the slave station.

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