Explicit Word Write: Echwr(724) - Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual

Network Instructions

3-25-10 EXPLICIT WORD WRITE: ECHWR(724)

Purpose
Ladder Symbol
Variations
Applicable Program Areas
Operands
When CIO 000000 and A20206 (the Communications Port Enabled Flag for
port 06) are ON, ECHRD(723) reads D00000 to D00002 from the I/O memory
of the CJ-series CPU Unit with node address 07 on the DeviceNet Network
and stores the data in D00100 to D00102 of the local CPU Unit.
CS1W-DRM21 DeviceNet Unit
(CPU Bus Unit with unit number 2)
ECHRD(723)
CPU
instruction
Unit
Unit address 12 hex (because
the unit number is 2)
DeviceNet
Explicit
message
15
D: D00100
D+1: D00100
D+2:
15 8 7
C: D00200 0 0 0
C+1: D00201 0 0 0
C+2: D00202 0 6 1
C+3: D00203 0 0 0
C+4: D00204 0 0
0
Writes data from the local CPU Unit to another CPU Unit in the network. (The
remote CPU Unit must support explicit messages.)
This instruction is supported only by CS/CJ-series CPU Unit Ver. 2.0 or later.
ECHWR(724)
S
D
C
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification
Block program areas
OK OK
S: First Source Word in Local CPU Unit
Specifies the leading word address in the local CPU Unit containing the write
data.
CJ1W-DRM21 DeviceNet Unit
CPU Unit
Node address 07
0
S: D00000
S+1: D00001
S+2: D00002
0
7
Node address of remote CPU Unit to be read = 07 hex (node 07)
3 Read data size (number of words) = 3 hex
Communications port = 6 hex (port 6),
2
and the DeviceNet Unit's unit address = 12 hex
Response monitoring time = 0000 hex (2 s)
0
Explicit format type = 0000 hex (DeviceNet format)
0
S: First source word in local CPU Unit
D: First destination word in remote CPU Unit
C: First control word
Step program areas Subroutines
OK
Section 3-25
15 0
ECHWR(724)
@ECHWR(724)
Not supported
Interrupt tasks
OK
1091