Omron SYSMAC CJ - REFERENCE MANUAL 08-2008

1089
Network Instructions Section 3-25
Description Reads the specified number of words from the first read word (specified in S)
in the remote CPU Unit with the node address specified in C, and stores the
data in the local CPU Unit memory words beginning at D.
Note ECHRD(723) sends an explicit message with the Service Code 1C hex (
Byte
Data Read
).
Flags
The corresponding Explicit Communications Error Flag will be OFF if the
instruction ended normally or ON if an error occurred.
If an error occurred (corresponding flag in A213 ON), the corresponding Com-
munications Port Error Flag can be used to determine whether the explicit
message itself was not sent (corresponding flag in A219 ON) or that the mes-
sage was sent but there was an error in the message (corresponding flag in
A219 OFF).
The corresponding Communications Port Completion Code (A203 to A210)
will be 0000 hex if the instruction ended normally, an explicit message error
code if an explicit messaging error occurred, or a FINS error code if a FINS
error occurred.
For details on the general operation of the network instructions, refer to
3-25-
2 About Explicit Message Instructions
.
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
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
Area S D C
Name Label Operation
Error Flag ER ON if the Communications Port Enabled Flag is OFF for
the communications port number specified in C.
OFF in all other cases.