Omron NX-series User Manual page 149

*1
Parameter
Message se-
quence number
Reserved 1
Data size
Reserved 2
Service code
Class ID
Instance ID
*2
Attribute ID
Data
*1. Parameters in the command are in little-endian order.
*2. This parameter exists only when the command service requires specification of an attribute ID.
*3. If there is no attribute ID, the address offset is 12.
*4. If there is no attribute ID, the maximum size is 492 bytes.
Response Format
The response format is illustrated in the following figure.
The examples of values in the table are the parameter values in little-endian format when the Vendor
ID (instance attribute ID 01 hex) in the Identity object (class ID 01 hex) is read.
+0 Message sequence number
+2 Data size
+4 Reserved
+5 Service code
+6 General status
+7 Size of Additional status
+8 Data
*1
Parameter
Message se-
quence number
Data size
Reserved
NX-series Communication Control Unit Built-in Function User's Manual (Z396)
Ad-
Size
dress
(bytes)
offset
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 corre-
sponding response.
Setting range: 0 to 65535
2 2 Always set to 0.
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
6 1 Always set to 0.
7 1 The service code for the destination object is set.
8 2 The class ID of the destination object is set.
10 2 The instance ID of the destination object is set.
12 2 Set the attribute ID of the destination object.
490 Set the data. The contents of the data depends on the
*3
14
service code.
*4
max.
Ad-
Size
dress
(bytes)
offset
0 2 The sequence number that was set when the command
was sent is returned.
2 2 The data size from the next parameter to the end of the
data is stored. The unit is bytes.
Size range: 4 to 500
4 1 Always set to 0.
9 TCP/UDP Message Service Function
Description
2 bytes
2 bytes
1 byte
1 byte
1 byte
1 byte
496 bytes max.
Description
Example
of a val-
ue (hex)
0000
0000
0800
00
0E
0100
0100
0100
---
9
Example
of a val-
ue (hex)
0000
0600
00
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