User guide

Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05 27
2Introduction
2.6 Conventions used for input/output identifiers
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2.6 Conventions used for input/output identifiers
This chapter describes the conventions used for the identifiers of the inputs/outputs of the function
blocks. The conventions ensure a uniform and consistent terminology and make reading and com-
prehending the interconnection and application easier.
 Tip!
The conventions used by Lenze are based on the "Hungarian Notation". This ensures that
the most significant characteristics of the corresponding input/output (e.g. the data type)
can be instantly recognised from its identifier.
An identifier consists of
• a data type entry
• an identifier (the "proper" name of the input/output)
• an (optional) signal type specification
Data type entry
The data type entry provides information about the data type of the corresponding input/output:
Identifier
The identifier is the proper name of the input/output and should indicate the application or func-
tion.
• Identifiers always start with a capital letter.
• If an identifier consists of several "words", then each "word" must start with a capital letter.
• All other letters are written in lower case.
Data type entry Meaning Resolution Value range
BBOOL 1 bit0 ≡ FALSE / 1 ≡ TRUE
by BYTE 8 bits1 0 ... 255
dn DINT 32 bits -2147483647 ... 2147483647
dw DWORD 32 bits 0 ... 4294967295
n INT 16 bits -32767 ... 32767
sSTRING --
t TIME 32 bits -
W WORD 16 bits 0 ... 65535