Siemens SIMATIC S7-1500 System Manual page 340

Extended instructions
File handling
FileReadC
FileWriteC
FileDelete
Reference information
ResolveSymbols
1)
Communication: maximum number of simultaneously running jobs
Table 10- 8
Open User Communi-
cation
TSEND
TUSEND
TRCV
TURCV
TCON
TCONSettings
TDISCON
T_RESET
T_DIAG
TSEND_C
TRCV_C
Table 10- 9
MODBUS TCP
MB_CLIENT
MB_SERVER
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF
1513R-1 PN
If you use the instruction WRIT_DBL (SFC84) to write data structures greater than 64 KB into the
load memory, the response times in the R/H-CPU user program can increase.
Recommendation: Only supply the formal parameter SRCBLK of the instruction WRIT_DBL with da-
ta structures with a maximum size of 64 KB. Split larger data structures into several smaller sub-
structures during writing.
Maximum number of simultaneous jobs for asynchronous instructions and lower-level in-
structions used for Open User Communication
1513R-1 PN
Up to
V3.0.
x
88
88
88
88
88
88
88
uses TSEND, TUSEND, TRCV, TCON, TDISCON
uses TSEND, TUSEND, TRCV, TURCV, TCON, TDISCON
Lower-level instructions used for asynchronous instructions for MODBUS TCP
1513R-1 PN
uses TSEND, TUSEND, TRCV, TURCV, TCON, TDISCON
uses TSEND, TUSEND, TRCV, TURCV, TCON, TDISCON
1515R-2 PN
1515R-2 PN
V3.1 up to Up to V3.1
or V2.9.x V3.0.
high- x high-
er
128 108 128
128 108 128
128 108 128
128 108 128
128 108 128
128 108 128
128 108 128
1515R-2 PN
Basics of program execution
10.5 Asynchronous instructions
1517H-3 PN 1518HF-4 PN
10
10
10
10
1517H-3 PN
Up to V3.1
or V3.0.x or V3.0.x
higher
er
256 288 320
256 288 320
256 288 320
256 288 320
256 288 320
256 288 320
256 288 320
1517H-3 PN
1518HF-4 PN
Up to V3.1
or
higher
320 384
320 384
320 384
320 384
320 384
320 384
320 384
1518HF-4 PN
339