Ertec 200P Use Cases; Use Case 1 (Uc1): Operation With External Host; Figure 1: Ertec 200P Use Cases - Siemens ERTEC 200P-2 Manual

1.3 ERTEC 200P Use Cases

The ERTEC 200P supports 2 use cases (UC1, UC2) that are shown in Figure 1:
ERTEC 200P use cases.
external Host-Controller
RAM

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.
Copyright © Siemens AG 2016. All rights reserved
Technical data subject to change
UC 1
(e. g. Technology IO)
FLASH
Host (App.)
XHIF
ERTEC 200P
EMC
RAM/FLASH
(PN-Stack)
ERTEC 200P

Figure 1: ERTEC 200P use cases

Standard IOs
Digital-,
Analog-IOs
XHIF/GPI
ERTEC 200P
RAM
Appl-Code
EMC
19
UC 2
Peripherals
RAM
(PN-Stack,
Application)
FLASH
(PN-Stack,
Application)
ERTEC 200P-2 Manual
Version 1.0