Siemens SINUMERIK 840DE sl Commissioning Manual page 420

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Table of Contents

Service and diagnostics

18.1 NC/PLC variables

PLC variables

Notation examples

Permissible notation for variables:

● PLC variables: EB2, A1.2, DB2.DBW2, VB32000002

● NC variables:

– NC system variables: Notation $AA_IM[1]

– User variables / GUD: Notation GUD/MyVariable[1,3]

– OPI notation: /CHANNEL/PARAMETER/R[u1,2]

If the PLC user program writes a string in an NC/PLC variable, the string will only be displayed

correctly if the variable is parameterized as a field variable of the type "A" (ASCII) on the NC

Example of a field variable

DBx.DBBy[<number>]

Inserting variables

The start value for "Filter/Search" of variables differs. For example, to insert the variable $R[0],

enter the following start value:

● The start value is 0 if you filter according to "System variables".

● The start value is 1 if you filter according to "All (no filter)". In this case, all signals are

displayed and shown in the OPI notation.

● Counter (Cx)

● Data block (DBx): Data bit (DBXx), data byte (DBBx), data word (DBWx),

data double word (DBDx)

● Data block (VBx): Data bit (VBXx), data byte (VBBx), data word (VBWx),

data double word (VBDx)

Decimal without sign

Decimal with sign

Floating point (for double words)

ASCII character

Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1

SINUMERIK Operate (IM9)

Sinumerik 840d sl