Omron CS1W-SLK11-21 - 06-2004, Manual

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PLC Network Instructions Section 6-2
Broadcasting Data It is possible to transfer the same data to all nodes in a network simulta-
neously by designating the destination node as FF Hex. This transmission is
called broadcasting. No responses are returned to broadcasts.
6-2-2 Communications Specifications
The basic specifications of the network instructions are given in the following
table.
6-2-3 PLC Memory Areas
The memory areas that can be used for data transfer depend on the model of
PLC, as shown in the following table. Be sure not to exceed the end of a mem-
ory area when sending or receiving data. Also be sure to set the operands so
that the end of the data area is not exceeded.
Note (1) Writing is not possible to words A000 through A447 in the Auxiliary Area.
(2) A maximum of thirteen banks can be used for Expansion DM. For details
on the EM Area and the number of banks, refer to the operation manual
for the PLC model that is being used.
Broadcast data
Node 1 Node 2 Node 3 Node 4 Node 5
Transmission
format 1:1 (SEND(90), RECV(98), or CMND(490))
1:N (SEND(90) or CMND(490); data broadcast, no response.
Max. number of words: 126 with Ethernet, 62 with SYSMAC
LINK, and 32 with Controller Link)
Packet length SEND(90)/RECV(98): 256 words (512 bytes) max.
CMND(490): 542 bytes max.
Data content SEND(90): Command/response data for data transmission
RECV(98): Command/response data for data reception
CMND(490):Command/response data for supported functions
Communica-
tions ports Ports 0 to 7
(8 ports can be used at the same time for data exchange)
Response time-
out time 0000: 2 s
0001 to FFFF:
User settings (in increments of 0.1 s, 0.1 to 6553.5 s)
Number of
retries 0 to 15
Area Range
CIO CIO 0000 to CIO 6143
Work Area W000 to W511
Holding Area H000 to H511
Auxiliary Area A000 to A959 (See note 1.)
Timer T0000 to T4095
Counter C0000 to C4095
Data Memory D00000 to D32767
Expansion Data Memory E00000 to E32767 (See note 2.)