Link Data Flow In Optical Link Loop - Mitsubishi Electric Melsec-k Instruction Manual

3. HARDWARE CONFIGURATION AND HANDLING
,
3.9 Link Data Flow in Optical Link Loop
The flow of data is explained by use of the optical
data link system which consists of
3
local program-
mable controllers.
After the system is started, the master programmable
controller (M) transfers link data to the local pro-
grammable controllers (L1
+
L2
+
L3) in due order.
( 1
)
Link data is transferred from M to L1
@
(2) Link data is transferred from L1 to M
@
- ,
@
+ @
(3) Link data is transferred from M t o L2
@ @
(4)
Link data is transferred from L2 to
M
@
- ,
@
(5)
Link data is transferred from M to L3
0
-f
@
+ o
(6) Link data is transferred from L3 to M
@
As indicated by (1) to (6), data is transferred in order
of M-, Land L-, M.
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