Read tag from Flexlogic

carlos25

Member
Join Date
Nov 2004
Posts
3
hoi;

I have a problem whith reading a Tage from a PLC (AB-Flexlogix). using the ethernet/ip protocol.
the message that i send to the plc is an array lake this one:
6F 00 2E 00 00 5D 02 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 FFFFFFB2 00 1A 00 52 02 20 06 24 01 0A FFFFFFF0 0A 00 4C 08 FFFFFF91 0A 56 41 44 5F 44 41 54 41 2D 31.


56 41 44 5F 44 41 54 41 2D 31 is the tag name.
cam sameone help me whith this problem.
thanks
 
It would help an awful lot if you posted something other than a raw set of hex bytes.

I presume you are trying to write your own non-RSLinx communication driver.

You will have to include a lot more information about your application, tools, and research before anyone on this Forum will be able to help.

I would begin by breaking up that hex string into it's CIP components so folks can understand.

You might also capture and post how the FlexLogix responds to that packet.
 
it is an unconnected cip messaging, the raply of the PLC is:
6F 00 00 00 0B 8E 02 0A 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

the TAG-name in ascii is 56 41 44 5F 44 41 54 41 2D 31.
yhe server askes for the info of the tag and the plc must reply a list of data with the values of alle components.
thanks
 
this array is the send MSG dat i use to read a tage from a AB plc.. (controllogix)
6F 00 2E 00 00 5D 02 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 B2 00 1A 00 52 02 20 06 24 01 0A F0 0A 00 4C 08 91 0A 56 41 44 5F 44 41 54 41 2D 31.

the tag name in ascii is:
56 41 44 5F 44 41 54 41 2D 31

the string that a receives from the plc back is:
6F 00 00 00 0B 8E 02 0A 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 B2 00 04 00 81 00 04 00

can sommeone help me!!!!
 
AB manuals

Apart from the ODVA's complete documentation on EtherNet/IP I would suggest that you download following literature from AB web site:

1.
Logix500 Data Access
Publication 1756-RM005A-EN-E March 2000

2.
Communicating with RA Products using Ethernet/IP explicit messaging Revision 1.2

No publication number given.

According to ODVA white paper there is also enabler technology available from ODVA web site. This is supposed to consist of
C library and a CIP protocol analyzer. I wasn't able to find these tools on their web site. I suppose that you need to become an ODVA
member first?
Does anyone know how to access these development tools?
I am really interested. Thanks.
 

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