Siemens Simatic S7-1500 - Page 64

A5E33284667-AF Page 63
Extended instructions
Basic instructions
Technology
Communication
S7-300/400
S7-1200 S7-1500
Instruction
Logs
Property of
the data
transfer
Data package size
Application and
application example
✔
✔
✔
TSEND
/TRCV TCP or
ISO-on-TCP
Reliable with
acknowledgment
<= 64 KB
Exception S7-1200:
<= 8 KB
Exchange large data volumes with
acknowledgment. For example: Send
data block with measured value logs to
any network node.
✔
✔
TSEND_C/TRCV_C
(connection establishment
and
termination are integrated)
✔
✔
UDP
Fast,
without
acknowledgment
Distribute larger amounts of data without
acknowledgment. For example
: Distribute
position data quickly to many devices.
An exact calculation of the limits is
available in the controller manuals.
(✔)
✔
✔
TUSEND
/TURCV
(not S7
-300)
Integrated interface:
Max. 1472 bytes
CP on S7-300/400:
Max. 2048 bytes