First time using Concept, and Modicon, second time using ModBus.
I am writing software in Concept, for a slave PLC to work with a multi PLC system.
I do not have access to the rest of the system.
My company is building a piece of the puzzle, to be added later to the whole.
In S7, I recall using a function block to set up the slave for ModBus communication and to order the memory locations for the master. The master would poll the slave, the slave would offer up the memory in an array of words / bytes, and all was well.
I expect ModBus in Modicon to be a bit easier.
Is there a function I need to include in the slave code to point to the memory location? Or does the master just pull it directly from memory?
I am reading about the MSTR instruction (Modicon Ladder Logic Block Library User Guide (840 USE 101 00))
I don't find any corresponding slave instruction. Is there one?
Thanks
I am writing software in Concept, for a slave PLC to work with a multi PLC system.
I do not have access to the rest of the system.
My company is building a piece of the puzzle, to be added later to the whole.
In S7, I recall using a function block to set up the slave for ModBus communication and to order the memory locations for the master. The master would poll the slave, the slave would offer up the memory in an array of words / bytes, and all was well.
I expect ModBus in Modicon to be a bit easier.
Is there a function I need to include in the slave code to point to the memory location? Or does the master just pull it directly from memory?
I am reading about the MSTR instruction (Modicon Ladder Logic Block Library User Guide (840 USE 101 00))
I don't find any corresponding slave instruction. Is there one?
Thanks