Datalogopen - Siemens SIMATIC S7 System Manual

101BExtended instructions
8.7 Data logging
8.7.2.2

DataLogOpen

Table 8- 125 DataLogOpen instruction
LAD / FBD SCL
"DataLogOpen_DB"(
In the SCL example, "DataLogOpen_DB" is the name of the instance DB.
2
Table 8- 126 Data types for the parameters
Parameter and type
REQ IN
MODE IN
NAME IN
ID In/Out
DONE OUT
BUSY OUT
ERROR OUT
STATUS OUT
You can provide either the NAME or an ID (ID parameter as an input) of a pre-existing data
log. If you provide both parameters and a valid ID does correspond to the NAME data log,
then the ID is used, and the NAME ignored.
296
req:=_bool_in_,
mode:=_uint_in_,
done=>_bool_out_,
busy=>_bool_out_,
error=>_bool_out_,
status=>_word_out_,
name:=_string_inout_,
ID:=_dword_inout_);
Data type Description
Bool A low to high (positive edge) signal starts the operation. (Default value:
False)
UInt Operation mode:


Variant Name of an existing data log: This variant only supports a String data type
and can only be located in local, DB, or M memory. (Default value: ' ')
DWord Numeric identifier of a data log. (Default value: 0)
Note: Symbolic name access for this parameter is not allowed.
Bool The DONE bit is TRUE for one scan, after the last request was completed
with no error. (Default value: False)
Bool


Bool The ERROR bit is TRUE for one scan, after the last request was
terminated with an error. The error code value at the STATUS parameter
is valid only during the single scan where ERROR = TRUE.
Word Execution condition code (Default value: 0)
Description
Opens a pre-existing data log file. A data log must be
opened before you can write new records to the log. Data
logs can be opened and closed individually. A maximum
of eight data logs can be open at the same time.
STEP 7 automatically creates the associated instance DB
when you insert the instruction.
0 - Append to existing data (Default value)
1 - Clear all existing records
0 - No operation in progress
1 - Operation on progress
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05