Reading Trace Data - Omron OMNUC W Series Manual

6 DeviceNet Communications

6.9.2 Reading Trace Data

6
Error Response
Number of bytes
received
Reading Word Data
Command Block
1D 00
Class ID
Service code
(1D fixed)
Destination
node address
Response Block
Service code
(9D fixed)
Source node
address
Number of bytes received
Note 1. The maximum number of words is 100.
2. If the settings for the beginning address and the number of words exceed the data capacity (data
traces 1 and 2: 1,000 words; I/O traces 1 and 2: 63 words), the number of words of data to be
read will be returned without generating an error.
Example: If the address is 1000 and the number of words is 10, only one word of data for
address 1000 will be returned.
Error Response
Number of bytes
received
94
Error code
Service code
(94 fixed)
Source node
address
67
Address, Low
Instance ID
9D
Word data, High
Word data, Low
Read data (200 bytes max.)
94
Error code
Service code
(94 fixed)
Source node
address
6-76
Number of words to read
Address, High
Word data, High
Word data, Low