Copyright © Siemens AG 2016. All rights reserved
19
ERTEC 200P-2 Manual
Technical data subject to change
Version 1.0
1.3 ERTEC 200P Use Cases
The ERTEC 200P supports 2 use cases (
UC1, UC2
) that are shown in Figure 1:
Figure 1: ERTEC 200P use cases
1.3.1 Use Case 1 (UC1):
Operation with external host
At many devices the communication and the application (technology) are located on
separate controllers. This is represented at the ERTEC 200P by the UC1. Only the
PROFINET IO stack then runs on the ERTEC 200P. The parallel host interface (XHIF)
with 16 or 32 bits can be connected with the external host.
Figure 2 shows the application with an external host processor. At the ERTEC 200P a
SDRAM has to be connected to the memory interface (EMC) in which the PN stack is
loaded when the host is boosted.
The acyclic communication data and the configuration data are stored, for example, in
the integrated TCM (Tightly Coupled Memory) (256 kbytes) of the ARM926 and the
cyclic data in the IO-RAM of the PER-IF. Transfer of the cyclic data (Arrow 1 + 2) is
controlled by the PN-IP and by the host. The PN-IP transfers the data into the IO-RAM
of the PER-IF. The host then transfers the data from there to its application.
ERTEC 200P
FLASH
(PN-Stack,
Application)
XHIF/GPI
EMC
RAM
(PN-Stack,
Application)
RAM
Appl-Code
Peripherals
ERTEC 200P
UC 2
Standard IOs
ERTEC 200P
RAM/FLASH
(PN-Stack)
XHIF
EMC
Host (App.)
RAM
FLASH
UC 1
external Host-Controller
(e. g. Technology IO)
Digital-,
Analog-IOs
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