Questions about the MSG in logix 5000;
Ok, so I have to do a explicit instruction over DeviceNet.
So I am looking at the manual for the particular device and it says to do a Service 4B (Hex) class 3 instance 1 no attribute and send a data type of STRUCT which in reality is a INT. (8 bits wide).
So I set up a MSG with CIP Generic Serice type Custom and plugged in the values. I noticed that if I left the Attribute blank it would default to zero.
So is 0 the same as "none" in this type of instruction?
Also I understand the Source element and source length purpose and I am confident I have that right but the device's instructions did not specify a Destination tag., so I left that blank. Logix 5000 seemed to be OK with this, or am I missing something?
This Service Type Custom is not as clean as Get Attribute Single or Set Attribute Single which I have more experience with.
Thanks
Ok, so I have to do a explicit instruction over DeviceNet.
So I am looking at the manual for the particular device and it says to do a Service 4B (Hex) class 3 instance 1 no attribute and send a data type of STRUCT which in reality is a INT. (8 bits wide).
So I set up a MSG with CIP Generic Serice type Custom and plugged in the values. I noticed that if I left the Attribute blank it would default to zero.
So is 0 the same as "none" in this type of instruction?
Also I understand the Source element and source length purpose and I am confident I have that right but the device's instructions did not specify a Destination tag., so I left that blank. Logix 5000 seemed to be OK with this, or am I missing something?
This Service Type Custom is not as clean as Get Attribute Single or Set Attribute Single which I have more experience with.
Thanks