Omron CS1W-RPT01 Manuale Utente
168
Introduction
Section 6-1
2.
With the message service, there is no guarantee that a message to a des-
tination node will reach its destination. It is always possible that the mes-
sage 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 oc-
curring by performing resend processing at the node where instructions
are issued. With the SEND, RECV, and CMND instructions, resend pro-
cessing 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.
tination node will reach its destination. It is always possible that the mes-
sage 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 oc-
curring by performing resend processing at the node where instructions
are issued. With the SEND, RECV, and CMND instructions, resend pro-
cessing 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.
RECV
RECV receives “m” words beginning with S (the beginning word for data
transmission at the destination node, M) to the words beginning with D (the
beginning word for data reception at the source node).
transmission at the destination node, M) to the words beginning with D (the
beginning word for data reception at the source node).
Note
1.
When communicating with a CVM1 or CV-series PLC manufactured prior
to April 1996 on the local network, the local network address cannot be set
to “00.” Set a number other than “00” as the local network address in the
routing tables, and then specify that number.
to April 1996 on the local network, the local network address cannot be set
to “00.” Set a number other than “00” as the local network address in the
routing tables, and then specify that number.
2.
With the message service, there is no guarantee that a message to a des-
tination node will reach its destination. It is always possible that the mes-
sage 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 oc-
curring by performing resend processing at the node where instructions
are issued. With the SEND, RECV, and CMND instructions, resend pro-
cessing 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.
tination node will reach its destination. It is always possible that the mes-
sage 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 oc-
curring by performing resend processing at the node where instructions
are issued. With the SEND, RECV, and CMND instructions, resend pro-
cessing 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.
Destination node M
Source node
@RECV(98)
S
D
C
"m" num-
ber of
send
words
ber of
send
words
D
15
0
15
0
…
m
S
Destination node M
01 to 20 (Hex): 1 to 32 (or 01 to 3E (Hex): 1 to 62)
The range of node addresses will vary for networks
other than Controller Link Networks.
01 to 20 (Hex): 1 to 32 (or 01 to 3E (Hex): 1 to 62)
The range of node addresses will vary for networks
other than Controller Link Networks.
C+1
0
0
C+3
0
0
Number of retries
0 to F (Hex): 0 to 15 retries
0 to F (Hex): 0 to 15 retries
Communication port No.
0 to 7
0 to 7
0: Response required
1: Response not required
1: Response not required
C+4
C
"m" number of send words
0000 to 03DE (Hex): 1 to 990 words
0000 to 03DE (Hex): 1 to 990 words
15
11
8 7
0
Destination network address
00 (Hex): Local network
01 to 7F (Hex): 1 to 127
00 (Hex): Local network
01 to 7F (Hex): 1 to 127
C+2
15
11
8 7
0
Destination unit address
00 (Hex):
00 (Hex):
PLC's CPU Unit
01 to 0F (Hex): Computer (user program)
10 to 1F (Hex): Unit nos. 0 to 15
E1 (Hex):
E1 (Hex):
Inner Board
FE (Hex):
Unit connected to network
15
10 8 7
3
0
Response monitor time
0000 (Hex): 2 s
0001 to FFFF (Hex): 0.1 to 6,553.5 s
(Unit: 0.1 s)
If the baud rate is slow, then setting a small
value may generate an error. The standard is
approximately 4 seconds at 1 Mbps or 8
seconds at 500 Kbps.
0000 (Hex): 2 s
0001 to FFFF (Hex): 0.1 to 6,553.5 s
(Unit: 0.1 s)
If the baud rate is slow, then setting a small
value may generate an error. The standard is
approximately 4 seconds at 1 Mbps or 8
seconds at 500 Kbps.
15
0
S: Source node beginning send word
D: Destination node beginning receive word
C: Source node first control data word
D: Destination node beginning receive word
C: Source node first control data word
…
(02 to 0F (Hex) are used
when using Controller Link
Support Boards for PCI Bus
only.)