Setting up a tool changer

if tool change is true turn on parallel pin 16
if tool change is true preset counter 1 with tool-prep-number
if tool change is true start timer 1 (preset 50ms)
if timer 1 is on turn on parallel pin 17
if timer 1 is done 
    and counter is done
    and parallel pin 10 is on return tool change done
if timer 1 is done and counter is not done reset timer 1

net tool-cng-req iocontrol.0.tool-change => classicladder.0.in-01
net tool-prep-number iocontrol.0.tool-prep-number => classicladder.0.s32in-01
net tool-cn-done iocontrol.0.tool-changed <= classicladder.0.out-01
net enable-tool-change classicladder.0.out-02 => parport.0.pin-16-out
net pulse-bit classicladder.0.out-03 => parport.0.pin-17-out
net tool-changed-bit classicladder.0.in-02 <= parport.0.pin-10-in

net tool-change iocontrol.0.tool-change => classicladder.0.in-01
net tool-number iocontrol.0.tool-prep-number => classicladder.0.s32in-01
net enable-tool-change classicladder.0.out-01 => parport.0.pin-16-out
net pulse-bit classicladder.0.out-02 => parport.0.pin-17-out
net tool-changed-bit classicladder.0.in-02 <= parport.0.pin-15-in
net tool-cn-done classicladder.0.out-03 => iocontrol.0.tool-changed

net tool-number <= iocontrol.0.tool-prep-number
net tool-change-loopback iocontrol.0.tool-change => iocontrol.0.tool-changed