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8.
COMMUNICATIONS USING DEDICATED PROTOCOLS
MELSEC-A
(b) Monitoring the devices re~istered bv the JM command (AnACPU
.
.
-
dedicatedcommand)
esignation Methodl
St. No. :Station number
Designation in protocol 1 is shown below.
Monitor (bit) command
/n.s-:..:
H L H L
Character area 6
NO.
NO.
E l
The number of characters for the number of points desig-
nated by monitor registration (JM)
OFF when the value is
0
(30H)
ON when the value is 1 (31 H)
esignation Example(
Monitoring is executed after registering the monitor data (bit units) in Example
1
of
(2) (b)
(Message wait time is 0 msec)
Check sum is calculated
within this range.
AJ71 C24
Indicates that T123 (contact) is ON
lndicates that Y60 is OFF.
lndicates that X40 is ON.
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