879
Network Instructions Section 3-24
Description CMND(490) transfers the specified number of bytes of FINS command data
beginning at word S to the designated device through the PLC’s CPU Bus or
over a network. The response is stored in memory beginning at word D.
CMND(490) can be used to transmit command data to a particular serial port
in the destination device as well as the device itself. CMND(490) operates just
like SEND(090) if the FINS command code is 0102 (MEMORY AREA WRITE)
and just like RECV(098) if the code is 0101 (MEMORY AREA READ).
If the destination node number is set to FF, the command data will be broad-
cast to all of the nodes in the designated network. This is known as a broad-
cast transmission.
If a response is requested (bits 12 to 15 of C+4 set to 0) but a response has
not been received within the response monitoring time, the command data will
be retransmitted up to 15 times (retries set in bits 0 to 3 of C+3). There will be
no response and no retries for broadcast transmissions. For instructions that
require no response, set the response setting to “not required.”
Area S C D
CIO Area CIO 0 to CIO 6143 CIO 0 to
CIO 6138
Work Area W0 to W511 W0 to W506
Holding Bit Area H0 to H511 H0 to H506
Auxiliary Bit Area A0 to A447
A448 to A959
A448 to A959 A0 to A442
A448 to A954
Timer Area T0000 to T4095 T0000 to T4090
Counter Area C0000 to C4095 C0000 to C4090
DM Area D0 to D32767 D0 to D32762
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants ---
Data Registers ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047, IR0 to –2048 to +2047, IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Local node
Command
Response
Command
data
(n bytes)
Response
data
(m bytes)
Execute
Interpret
Destination node
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