The TSX DMY 28RFK module works independently from the PLC task. It has its own inputs/outputs (16I/12O) and therefore guarantees a reaction time of less than 1 ms.
At the same time, but at the rate of the PLC task allocated to them, the variables within the module are exchanged with the PLC processor.
These variables are :
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the image bits of the state of the physical inputs of the module (%I),
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the image bits of the state of the physical and auxiliary outputs of the module (%I),
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the command bits of the module's outputs (%Q).
The following illustration summarizes the operating principle of the reflex discrete module.
