LS Industrial Systems GLOFA GM7U Series - Page 146

Chapter 7. Usage of Various Functions
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(e) RTD module setting
• Follow the same way when the PID function is only used.
(f) D/A module setting
• Follow the same way when the PID function is only used.
(g) Program
• When the input condition %MX0 turns on, PID auto tuning operation is executed following the registered auto
tuning parameter at 0 loop.
• Auto tuning status is registered in %MB100, and the output value of control result is registered in %MW4100
(channel 0 of D/A conversion module)
• When auto tuning is completed, END output becomes 1 and the calculated P,I,D values are saved
in %MW4805, %MW4807, %MW4806 respectively.
• When END output is On, PID operation is executed following the registered PID parameter at 0 loop.
• PID operation status is registered in %MB200, and the output value is registered in %MW4100 (channel 0 of D/A
conversion module)
• When %MX0 contact turns Off, 0 is outputted at %MW4100 (channel 0 of D/A conversion module)
When the auto tuning is finished as a result of the execution of
the PID7AT command, the PID operation is executed following
the values of %MW4105 (P), %MW4107 (I), %MW4106(D).