Siemens SIMATIC ET 200pro - Page 58

Basics of program execution
6.2 Asynchronous instructions
CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
Operating Instructions, 11/2019, A5E35873416-AC
57
Table 6- 7 Lower-level instructions used for asynchronous instructions for MODBUS TCP
MODBUS TCP
CPU 1516pro-2 PN
MB_CLIENT
uses TSEND, TUSEND, TRCV, TURCV, TCON, TDISCON
MB_SERVER
uses TSEND, TUSEND, TRCV, TURCV, TCON, TDISCON
Table 6- 8 Maximum number of simultaneously running jobs for asynchronous instructions for S7
communication. The S7 communication instructions use a common pool of resources.
S7 communication
CPU 1516pro-2 PN
PUT
GET
USEND
URCV
BSEND
BRCV
384
Table 6- 9 Lower-level instructions used for asynchronous instructions for communication proces-
sors
Communications processors
CPU 1516pro-2 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
ET 200S serial interface
S_USSI
uses CREATE_DB
SIMATIC NET CP
FTP_CMD
uses TSEND, TRCV, TCON, TDISCON