Siemens CP 443-1 User Manual

2 Requirements for Use
B4A−13
CP 443-1 Advanced for Industrial Ethernet / Manual Part B4A
Release 01/2007
C79000-G8976-C193-06
Key to table 2-1 continued
1)
Caution:
The AG_LRECV call with long data (data > 240 bytes) occupies both a send and a receive resource. This
affects the configuration limits of the SEND/RECEIVE interface (AG_SEND) .
This means that if you use AG_LRECV calls with long data (data > 240 bytes), this reduces the number
of AG_SEND/AG_LSEND calls that can be sent at the same time, as follows:
Number of AG_SEND/AG_LSEND in total
= number of AG_SEND/AG_LSEND maximum − number of AG_LRECV with long data
Example:
This means, for example, at a maximum of 64 possible AG_SEND calls: At the absolute limit with 64
AG_RECV calls with long data sent at the same time, no calls with AG_SEND can be sent because the
available send resources are then occupied.
2)
Note
The maximum value shown here applies to the CPU being used; if several CPs are operated at the same
time, the maximum value applies unchanged to the total number of jobs issued by the CPU.
Example: If you use two CPs, via which a CPU 414-3 operates a total of 100 connections, only 24 jobs can
be processed directly at any one time.
3)
Note
When operating the CP as a PROFINET IO controller, multiprocessing is not supported; in other words,
only process image of the assigned CPU can be distributed over the CP. (Note: this does not affect
communication protocols operating alongside in multiprocessing mode).

Siemens CP 443-1 Specifications

General

Brand	Siemens
Model	CP 443-1
Category	Computer Hardware
Language	English