Appendices
A - 40
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
Response Format
When a response is returned from the destination device on the network, the EtherNet/IP Coupler
Unit sends the response (a TCP/IP message or UDP/IP message) to the device on Ethernet that
sent the command.
The response format is shown below.
The examples of values in the table are the parameter values in little endian when the Vendor ID
(instance attribute ID 01 hex) in the Identity object (class ID 01 hex) is read.
Parameter
*1
*1. Parameters in the command are in little endian order.
Address
offset
Size
(bytes)
Description
Exam-
ple
value
(hex)
Message
sequence
number
0 2 Numbers are set to differentiate frames when there is more
than one send frame.
An arbitrary value is assigned by the device that sends the
message. The same value is stored in the corresponding
response.
Setting range: 0 to 65535
0000
Reserved 1 2 2 Always set to 0. 0000
Data size 4 2 The data size from Reserved 2 to the end of the data is set.
The unit is bytes.
Setting range: 6 to 498
0800
Reserved 2 6 1 Always set to 0. 00
Service code 7 1 The service code for the destination object is set. The service
code that is set here is sent to the destination node as is.
0E
Class ID 8 2 The class ID of the destination object is set. The class ID that
is set here is sent to the destination node as is.
0100
Instance ID 10 2 The instance ID of the destination object is set. The instance
ID that is set here is sent to the destination node as is.
0100
Attribute ID
*2
*2. This parameter exists only when the command service requires specification of an attribute ID.
12 2 Set the attribute ID of the destination object. 0100
Data
14
*3
*3. If there is no attribute ID, the address offset is 12.
490 max.
*4
*4. If there is no attribute ID, the maximum size is 492 bytes.
Set the data. The contents of the data depends on the ser-
vice code.
---
+0 Message sequence number 2 bytes
+2 Data size 2 bytes
+4 Reserved 1 byte
+5 Service code 1 byte
+8 Data 496 bytes max.
+6 General status 1 byte
+7 Size of additional status 1 byte
To Next Page
Loading...
Need help?
General
