Reading multiple drive parameters

[dgagliadi]

Hello,

I'm trying to read a list of drive parameters. The current PLC CIP Generic message structure is this:
Message Type: CIP Generic
Service Type: Custom
Service Code: 4b
Class: 93
Instance: 0
Attribute:0
Source Element: [integer array containing params to be read]
Source length: 60
Destination Element: [integer array to hold store drive data]

I have the "get_attribute_single" working, so I know my system is communicating and generally working, but in the "services" list i dont see anything that is the equivalent to "4b". I've tried to use "get_attribute_list" with "request_data" array of bytes equaling params, but this is not working.

Does anyone know if this is possible and if so, have any sample code? I've looked through references and could not find this one.

Thanks in advance.