HITACHI Conversion to S7-1200

Can you help me w/ this please, i have an ongoing conversion of HITACHI to S71200. Does anybody here have an idea about what is FUN block means in HITACHI?and why did there address where written by numbers e.g are 990&995 and what is the equevalent of FUN block to siemens programming altough i have a clue, but just to be sure w/ the experts there.. i also attached a copy of the sample program for your reference. Thanks and Regards to all...

FUN means FUNction in Hitachi.

Syntax and means of the command usually depends on PLC type.

Inthis example(page 5-16) you can find descriptions for EH150 PLC.

So, FUN is same as function in siemens.

E.g. CALL FC 03