Siemens SIMATIC NET S7-400 Equipment Manual

Application and functions
1.3 Requirements for use
CP 443-5 Extended
Equipment Manual, 01/2023, C79000-G8976-C162-10
17
Refer to the documentation of the program blocks in the online help of STEP 7 or in the
manual "/7/ (Page 51)".
Note
We recommend that you always use the latest block versions for all module types.
You will find information on the curr
ent block versions and the current blocks to download
from the Internet in our Customer Support at the following address:
Link: (
https://support.industry.siemens.com/cs/ww/en/ps/15677/pm)
With older module types, this recommendation assumes that you are using the latest
firmware version for the particular module type.
Program blocks for open communications services
Program block
Meaning
AG_SEND (FC5)
Send data
AG_RECV (FC6)
Receive data
AG_LSEND (FC50)
Send data
AG_LRECV (FC60)
Receive data
Program blocks for S7 communication
Program block
Meaning
USEND (SFB 8) / URCV (SFB 9)
Uncoordinated sending / receipt of data
BSEND (SFB 12) / BRCV (SFB 13)
Block-oriented sending / receipt of data
PUT (SFB 14) / GET (SFB 15) Write data to a remote CPU / read data from a
remote CPU
START (SFB 19) / STOP (SFB 20)
Run a warm restart / stop on a remote device.
RESUME (SFB 21)
Run a hot restart on a remote device.
STATUS (SFB 22)
Query the device status of a remote partner.
USTATUS (SFB 23)
Receive the status change of a remote device.
CONTROL (SFC 62)
Query the status of the connection belonging to
an SFB instance.
For more information on the program blocks for S7 communication, see also STEP 7 online
help or the manual /8/ (Page 51))

Siemens SIMATIC NET S7-400 Specifications

General

Brand	Siemens
Model	SIMATIC NET S7-400
Category	Conference System
Language	English