Immediate values

Introduction

Converting a PL7 application into a Control Expert application generates certain differences, which are described in the following paragraphs.

Integer and long integer words

WORD and DWORD types are converted into INT and DINT types by the PL7 converter.

A hexadecimal immediate value greater than 16#7FFF (+32767) is converted to a negative decimal value, the original value is shown in the comment (example: %MW0:=16#ABCD is converted to %MW0:=-21555 {16#ABCD}).

The conversion of the immediate value of a long integer is identical for values greater than 16#7FFFFFFF (+2147483647) (example: %MD80:=16#ABCDABCD is converted to %MD80:=-1412584499 {16#ABCDABCD}).

Network address words

The address ADR# is replaced in Control Expert by an . For a given address ADR#{r.s}\xy.i.c\xy.i.SYS, there are two possible scenarios:

xy corresponds to the bus address:
- the converter replaces xy by a bus number,
- the converter chooses the bus number, which is specified in the Control Expert configuration.
xy corresponds to the rack number and position:
- the converter replaces xy by r.m,
- the rack 0 information becomes explicit.
  
  If xy < 100, the rack number is equal to 0 (example: xy=12, r.m = 0.12).
  
  If xy > 100, the rack number is equal to the first digit (example: xy=715, r.m = 7.15).