1087
Network Instructions Section 3-25
In this case, the Number of Contact Operations is being set to 500 (1F4 hex),
so the service data is set to 000001F4.
3-25-9 EXPLICIT WORD READ: ECHRD(723)
Purpose Reads data to the local CPU Unit from 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.
Ladder Symbol
Variations
10 08 02 68 F4 01 00 00
Attribute ID
Service Data:01F4Hex
Instance ID
Class ID
Service Code
Explicit message command format
Destination node address
CS1W-DRM21 DeviceNet Unit
(CPU Bus Unit with unit number 2)
ESATR(722)
instruction
CPU
Unit
Unit address 12 hex (because
the unit number is 2)
Slave (I/O Terminal)
with node address 10
Explicit
message
S: D00000 0 0 0 C
S:+1 D00001 0 0 0 A
S+2: D00002 0 0 0 8
S+3: D00003 0 0 0 2
S+4: D00004 0 0 6 8
S+5: D00005 0 1 F 4
S+6: D00006 0 0 0 0
C: D00201 8 6 1 2
C+1: D00202 0 0 0 0
C+2: D00203 0 0 0 0
Number of bytes of data: S+1 to S+6 = 6 words = 12 bytes = 0C hex
Slave’s node address = 10 = 0A hex
Class ID = 08 hex
Instance ID = 02 hex
Attribute ID = 68 hex
Service Data = F401 hex
Byte order = 8 hex (from rightmost byte), communications port = 6
hex (port 6), and the DeviceNet Unit’s unit address = 12 hex
Response monitoring time = 0000 hex (2 s)
Explicit format type = 0000 hex (DeviceNet format)
ECHRD(723)
S
D
C
S: First source word in remote CPU Unit
D: First destination word in local CPU Unit
C: First control word
Variations Executed Each Cycle for ON Condition ECHRD(723)
Executed Once for Upward Differentiation @ECHRD(723)
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification Not supported
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