Basics of program execution
7.5 Asynchronous instructions
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
167
Communication: maximum number of simultaneously running jobs
Table 7- 7
Maximum number of simultaneous jobs for asynchronous instructions and lower-level in-
structions used for Open User Communication
Open User Communi-
cation
1513R-1 PN
1515R-2 PN
1517H-3 PN
TSEND
TUSEND
128
192
320
TRCV
TURCV
128
192
320
TCON
128
192
320
TDISCON
128
192
320
T_RESET
128
192
320
T_DIAG
128
192
320
TSEND_C
uses TSEND, TUSEND, TRCV, TCON, TDISCON
TRCV_C
uses TSEND, TUSEND, TRCV, TURCV, TCON, TDISCON
Table 7- 8
Lower-level instructions used for asynchronous instructions for MODBUS TCP
MODBUS TCP
1513R-1 PN
1515R-2 PN
1517H-3 PN
MB_CLIENT
uses TSEND, TUSEND, TRCV, TURCV, TCON, TDISCON
MB_SERVER
uses TSEND, TUSEND, TRCV, TURCV, TCON, TDISCON
Table 7- 9
Lower-level instructions used for asynchronous instructions for communications proces-
sors
Communications pro-
cessors
1513R-1 PN
1515R-2 PN
1517H-3 PN
PtP communication
Port_Config
uses RDDEC, WRREC
Send_Config
uses RDDEC, WRREC
Receive_Config
uses RDDEC, WRREC
Send_P2P
uses RDDEC, WRREC
Receive_P2P
uses RDDEC, WRREC
Receive_Reset
uses RDDEC, WRREC
Signal_Get
uses RDDEC, WRREC
Signal_Set
uses RDDEC, WRREC
Get_Features
uses RDDEC, WRREC
Set_Features
uses RDDEC, WRREC
USS communication
USS_Port_Scan
uses RDDEC, WRREC
MODBUS (RTU)
Modbus_Comm_Load
uses RDDEC, WRREC
Reference
You can find additional information on block parameter assignment in the STEP 7 online
help.
Summary of Contents for Simatic S7-1500H
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