NevisGroup
Member
Hello all.
I am in the process of writing some code in Python to chat with a Logix controller. Part of the process has been to watch the conversation between an HMI and the controller with WireShark. As I am going though the dumps I have everything pretty well worked out except I have one request to Class ID 0xAC. I can not find any documentation on what that is.
More detail.
I have a Multiple Service Request Packet.
The first service request is 0x03 (Request Attributes)
The path is 20AC2401. Which translates to Class 0xAC , Instance 01
It then goes on to ask for Attribute 0x01.
The next service is 0x4D, (Write Tag Service) which I have all kinds of documentation about.
Does anybody know what Class AC is? More importantly where is it documented??
(I have ODVA Vol 1 and 3 and various docs from Rockwell)
Thanks
I am in the process of writing some code in Python to chat with a Logix controller. Part of the process has been to watch the conversation between an HMI and the controller with WireShark. As I am going though the dumps I have everything pretty well worked out except I have one request to Class ID 0xAC. I can not find any documentation on what that is.
More detail.
I have a Multiple Service Request Packet.
The first service request is 0x03 (Request Attributes)
The path is 20AC2401. Which translates to Class 0xAC , Instance 01
It then goes on to ask for Attribute 0x01.
The next service is 0x4D, (Write Tag Service) which I have all kinds of documentation about.
Does anybody know what Class AC is? More importantly where is it documented??
(I have ODVA Vol 1 and 3 and various docs from Rockwell)
Thanks