Kindly assist with the meaning of the following functions calls:
CALL FC 122
IN0 :=P#DB121.DBX 336.0
IN30 :=DB121
IN31 :=M2.2
IN32 :=Q3.3
IN33 :=DB101.DBX1.7
IN34 :=DB101.DBX1.6
OUT35:=DB111.DBD90
OUT36:=DB111.DBD94
OUT37:=M103.4
OUT38:=M103.0
OUT39:=M103.1
OUT40:=M103.2
OUT41:=M103.3
IO42 :=DB112.DBX34.0
IO43 :=DB112.DBX34.1
IO44 :=DB112.DBX34.2
IO45 :=DB112.DBX34.3
IO46 :=DB112.DBX34.4
A M 103.0
= DB112.DBX 14.0
A M 103.1
= DB112.DBX 14.1
A M 103.2
= DB112.DBX 14.2
A M 103.3
= DB112.DBX 14.3
A M 103.4
= DB112.DBX 14.4
CALL FC 122
IN0 :=P#DB121.DBX 336.0
IN30 :=DB121
IN31 :=M2.2
IN32 :=Q3.3
IN33 :=DB101.DBX1.7
IN34 :=DB101.DBX1.6
OUT35:=DB111.DBD90
OUT36:=DB111.DBD94
OUT37:=M103.4
OUT38:=M103.0
OUT39:=M103.1
OUT40:=M103.2
OUT41:=M103.3
IO42 :=DB112.DBX34.0
IO43 :=DB112.DBX34.1
IO44 :=DB112.DBX34.2
IO45 :=DB112.DBX34.3
IO46 :=DB112.DBX34.4
A M 103.0
= DB112.DBX 14.0
A M 103.1
= DB112.DBX 14.1
A M 103.2
= DB112.DBX 14.2
A M 103.3
= DB112.DBX 14.3
A M 103.4
= DB112.DBX 14.4