Installation of the discrete reflex module
9.1
General presentation of discrete reflex module
Presentation of discrete reflex module
General
Operating principle
The standard architecture of the PLC with I/O modules and periodical or event tasks does not allow for the reaction time required by certain types of applications.
l l l l l l
The aim of the TSX DMY 28 RFK discrete reflex module is to resolve these particular application issues. In order to do this, it has: a faster response time than the Fast task or event task.
an output reaction with a simple logic of under 0.5 ms, speed control for moving parts and movement stopping control when the speed becomes too slow,
feedback control between movements, time-outs with a time base of 0.1ms
continuous oscillation generation at a fixed frequency, but with a variable duty cycle, l ...
The TSX DMY 28 RFK module operates independently from the PLC task . It has its own I/Os (16I/12O), ensuring a reaction time of less than 1ms.
At the same time, the internal variables are exchanged with the PLC processor, but l l l at the rate of the PLC task assigned to them.
These variables are as follows: the image bits of the module's physical input status (%I), the image bits of the module's physical and auxiliary output statuses (%I), the command bits of the module outputs (%Q).
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TLX DS 57 PL7 xx
Illustration
Installation of the discrete reflex module
The diagram below shows the operating principle of the discrete reflex module.
Response time < 1 ms
TSX DMY 28 RFK Module
Inputs Outputs
Reflex function
%Ixy.i (0 à 15)
PLC task
Acquisition
%Ixy.i (16 à 31)
%Ixy.i.1 (16 à 31)
Processing
Update
%Qxy.i
TLX DS 57 PL7 xx
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