(2)In case that setting the data link (save memory function) when the master station and all slave stations are JW-21MN's.

Memory addresses inside control module of slave station continue in order of receiving and sending.

Master station 00(8)

Slave station 01(8) n=02to77 (8)

Slave station n

: Send

(Data memory)

(Data memory)

(Data memory)

: Receive

linkRelay a(Within areaoftotal bytes)256

0

1

n 1

0

n

1

*1

(Within control

*1 (Within JW-21MN)

module)

(Within

1

 

64 bytes

 

in total)

 

 

n

1+1

 

hn

1

 

n +n

 

 

n

0

*1

n

- Omitted a memory map

*inside control module. 1

arealink oftotal bytes)2048

Registera(Within

1

1

0 n

n

1

n

 

(Within a

 

total of

1

512 bytes)

 

1+1

*n

 

n

1

n +n

n

 

Flag

0

1

n

 

 

 

 

11

area

24bytes

24bytes

24bytes

 

 

 

 

-Set the relay link area, the register link area, and the flag area within the settings range of page 11-11, 12 and 23. Be careful not to double any address allocation of these.

-Set a0 to en, h1 to in above for parameters of master station and slave station (see page 11-5, 6 and 22) and set f1/fn/g1/gn marked "*" by module No. switch of the JW-21MN (see page 11-2).

Parameter for setting in master station

Parameter for setting in slave station

 

 

 

Top address of relay link area a0, a1 to an

Top address of flag area (slave station) e1 to

 

 

 

 

en

 

 

 

Top address of register link area b0, b1 to bn

Number of receiving bytes of relay link area

 

 

 

 

h1 to hn

 

 

 

 

 

*

 

 

Number of sending bytes of relay link area

Number of receiving bytes of register link

 

V2

 

 

 

c0, c1 to cn

area i1 to in

 

 

 

Number of sending bytes of register link

 

 

 

 

area d0, d1 to dn

 

 

 

 

Top address of flag area (master station) e0.

 

 

 

 

 

 

 

 

 

*Number of receiving bytes of slave station (h1 to hn, i1 to in)

Select self-setting or "same as number of sending bytes (c1 to cn, d1 to dn)" according to parameter (007720 to 007723) of slave station.

Note: When installing JW-21MN without 30Hn mark or 30H mark into JW20/JW20H, number of receiving bytes of each slave station is the same as number of sending bytes.

11-8