Siemens SIMATIC S7-1200

Basic instructions
8.6 Move operations
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
277
8.6.6
LOWER_BOUND: (Read out ARRAY low limit)
Table 8- 85 LOWER_BOUND instruction
LAD / FBD
SCL
Description
out := LOWER_BOUND(
ARR:=_variant_in_,
DIM:=_udint_in_);
You can declare tags with ARRAY[*] in the block
interface. For these local tags, you can read out
the limits of the ARRAY. You will need to specify
the required dimension at the DIM parameter.
The LOWER_BOUND (Read out ARRAY low
limit). instruction lets you read out the variable
low limit of the ARRAY.
Parameters
The following table shows the parameters of the instruction "LOWER_BOUND: Read out
ARRAY low limit":
Parameters
Declaration
Data type
Memory area
Description
EN
Input
BOOL
I, Q, M, D, L
Enable input
ENO Output BOOL I, Q, M, D, L Enable output ENO has the
signal state "0" if one of the
following conditions applies:
• The EN enable input has
the signal state "0".
• The dimension specified
at input DIM does not ex-
ist.
ARR Input ARRAY [*] FB: Section InOut
FC: Sections Input
and InOut
ARRAY of which the variable
low limit is to be read.
DIM Input UDINT I, Q, M, D, L or
constant
Dimension of the ARRAY of
which the variable low limit is
to be read.
OUT
Output
DINT
I, Q, M, D, L
Result
You can find additional information on valid data types under "Data types (Page 125)":