Hello all:
I'am new to CIP protocol.Currently I want to read tag value from AB PLC not using RSLinx.When I put the tag name as address into the read command(0x4C),I can get the value.But I found that someother tool use some 32bit handle instead of tag name to get the value.I think using the 32bit handle may be faster than using tagname.So the problem comes out,I don't know which CMD is used to get the handle.
Anyone Can help me?Thanks very much.
I'am new to CIP protocol.Currently I want to read tag value from AB PLC not using RSLinx.When I put the tag name as address into the read command(0x4C),I can get the value.But I found that someother tool use some 32bit handle instead of tag name to get the value.I think using the 32bit handle may be faster than using tagname.So the problem comes out,I don't know which CMD is used to get the handle.
Anyone Can help me?Thanks very much.