The controller display for the plant personnel does not present all possi

ble variables associated with the PID algorithm. For each variable, state

whether or not it is displayed and why: $($a$)$ controlled variable, $($b$)$ error,

$($c$)$ set point, $($d$)$ manipulated variable, $($e$)$ integral of the error, $($f$)$ derivative

of the error, and $($g$)$ initialization constant.