=== M07 - Mist Coolant ON ===

Normally M07 function is the simplest PLC procedure. It should just turn ON 1 relay and exit.
PLC source code will look like - 

<code c M07.plc>
main()
{
  portset(5);
  exit(99);  //normal exit.
};
</code>

**Output #5** is used as coolant pin.

According to smart programming books it is a good style to avoid direct numbers in source code (**portset(5)**) and use variable or define names instead.

In this case source code will be 

<code c M07.plc>
#include pins.h
main()
{
  portset(OUT_COOLANT);
  exit(99);  //normal exit.
};
</code>

name "OUT_COOLANT is defined in "vars.h" file which is included in the first line.

<code c pins.h>

#define OUT_COOLANT   5
</code>