Process parameter list on HTML template script

Hi,

after read HTML templates script docs is not clear for me how to pass a list of process parameters to a custom HTML script. 
the idea is to make a call from template like:

$SCRIPT(CCC_script_print_html,$PC(param1)|$PC(param2):HTML$
I’ve tried also with “” but it fails due to errors in the call to the script.  
is this possible to be done? Has anyone already done is?

thanks