Communications Specifications; Plc Memory Areas - Omron CS1W-SLK11-21 - 06-2004 Manual

PLC Network Instructions
Broadcasting Data
6-2-2

Communications Specifications

6-2-3

PLC Memory Areas

Note
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.
Node 1 Node 2
The basic specifications of the network instructions are given in the following
table.
Transmission 1:1 (SEND(90), RECV(98), or CMND(490))
format
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- Ports 0 to 7
tions ports (8 ports can be used at the same time for data exchange)
Response time- 0000: 2 s
out time 0001 to FFFF:
User settings (in increments of 0.1 s, 0.1 to 6553.5 s)
Number of 0 to 15
retries
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.
Area
CIO
Work Area
Holding Area
Auxiliary Area
Timer
Counter
Data Memory
Expansion Data Memory
(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 3 Node 4
Range
CIO 0000 to CIO 6143
W000 to W511
H000 to H511
A000 to A959 (See note 1.)
T0000 to T4095
C0000 to C4095
D00000 to D32767
E00000 to E32767 (See note 2.)
Section 6-2
Node 5
93