Omron CJ - REFERENCE MANUAL 02-2010 Reference Manual page 990

3. Instructions
Hint
• ECHRD(723) sends an explicit message with the Service Code 1C hex (Byte Data Read).
Example Programming
In this example, ECHRD(723) is used to read the I/O memory of the CJ-series CPU Unit on the
DeviceNet network, and store the data in the I/O memory of the local CPU Unit.
Communications
Port Enabled Flag (Port 6)
0.00
CS1W-DRM21 DeviceNet Unit
(CPU Bus Unit with unit number 2)
CPU
Unit
Unit address 12 hex (because
the unit number is 2)
Explicit
message
15
D: D100
D+1: D100
D+2:
954
A202.06
@ECHRD
D0
S
D100
D
D200
C
CJ1W-DRM21 DeviceNet Unit
ECHRD(723)
instruction
DeviceNet
15
C: D200
C+1: D201
C+2: D202
C+3: D203
C+4: D204
0
S:
S+1:
S+2:
When CIO 0.00 and A202.06 (the Communications Port
Enabled Flag for port 06) are ON, ECHRD(723) reads D0
to D2 from the I/O memory of the CJ-series CPU Unit
with node address 07 on the DeviceNet Network and
stores the data in D100 to D102 of the local CPU Unit.
CPU Unit
Node address 07
8 7 0
Node address of remote CPU Unit to be read = 07 hex (node 07)
0 0 0 7
Read data size (number of words) = 3 hex
0 0 0 3
Communications port = 6 hex (port 6),
0 6 1 2
and the DeviceNet Unit's unit address = 12 hex
Response monitoring time = 0000 hex (2 s)
0 0 0 0
Explicit format type = 0000 hex (DeviceNet format)
0 0 0 0
15 0
D0
D1
D2
CS/CJ/NSJ Series Instructions Reference Manual (W474)