Omron CJ1W-PNT21 Operation Manual page 90

FINS Commands and Responses
C MND
S
S : S ource node beginning s end word
D: Des tination node beginning receive word
D
C : S ource node firs t control data word
C
15
C
"n" bytes of command data
0000 to 07C 6 (Hex): 0 to 1,990 words
15
C +1
"m" bytes of res pons e data
0000 to 07C 6 (Hex): 0 to 1,990 words
15 11
C +2 0 0
15
C +3
Des tination unit addres s
00 (Hex):
01 (Hex):
10 to 1F (Hex): Unit nos. 0 to 15
E 1 (Hex):
F E (Hex):
Des tination node N
00 to 20 (Hex): 0 to 32
T he s ame data can be broadcas t to all nodes
on the network by s etting the des tination node addres s
to F F (Hex).
T he range of node addres s es will vary for networks
other than C ontroller Link Networks.
Note
76
0
0
8 7 0
Des tination network addres s
00 (Hex): Local network
01 to 7F (Hex): 1 to 127
8 7 0
P C 's C P U Unit
C omputer (us er program)
Inner B oard
Unit connected to network
With the message service, there is no guarantee that a message to a
destination node will reach its destination. It is always possible that the
message may be lost in transit due to noise or some other condition.
When using the message service, it is advisable to prevent this situation
from occurring by performing resent processing at the node where
instructions are issued. With the CMND instruction, resent processing is
performed automatically once the number of retries has been set, so be
sure to specify a number other than "0" for the number of retries.
S ource node
0
15
S
"n" bytes
of com-
mand
(S –1)
data
n
+
2
D
"m" bytes
of
res pons e
data
(D –1)
m
+
2
15 10 8 7 3
C +4 0 0 0
0: R es pons e required
1: R es pons e not required
15 10 8 7 3
C +5
R es pons e monitor time
0000 (Hex): 2 s
0001 to F F F F (Hex): 0.1 to 6,553.5 s
(Unit: 0.1 s )
If the baud rate is s low, then s etting a
s mall value may generate an error. T he
s tandard is approximately 4 s econds at
1 Mbps or 8 s econds at 500 Kbps.
Figure 6.3: CMND instruction
Section 6-1
Des tination node N
C ommand
Analys is
R es pons e
E xecution
0
Number of retries
0 to F (Hex): 0 to 15 retries
0