Siemens SIMATIC S7-1500 System Manual page 167

Basics of program execution
8.3 Asynchronous instructions
Extended instructions
Data block functions
CREATE_DB
READ_DBL
WRIT_DBL
DELETE_DB
File handling
FileReadC
FileWriteC
Basic instructions: maximum number of simultaneously running jobs
The following table shows the maximum number of simultaneously running jobs for
asynchronous basic instructions.
Table 8- 5
Basic instructions
Array DB
ReadFromArrayDBL
WriteToArrayDBL
166
CPU 1504D TF
Basic instructions
CPU 1504D TF
Uses READ_DBL (see Extended instructions)
Uses READ_DBL, WRIT_DBL (see Extended instructions)
CPU 1507D TF
10
10
10
10
10
10
CPU 1507D TF
SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA