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8.1.5 Configuration of the Profibus-DP Slave
In the easy mode the gateway uses a fixed I/O-configuration. If you use the GSD-file
select the module "Standardmodus".
If you configure the master without the GSD-file, select the identification byte
3F
(=63
).
hex
dec
For double masters you need this identification byte for each AS-i circuit.
8.2
Advanced Mode
The extended functionality of the advanced mode affords a more extensive configu-
ration of Profibus-DP. The I/O window can be adjusted optimally to the additional
transmitted data (AS-i parameters, user memory, AS-i Control Code). The length of
the I/O-window depends on the following factors:
• number of the AS-i slaves (number of input and output bytes)
• shall AS-i parameters be transmitted?
• shall AS-i Control code be transmitted?
• shall user memory be transmitted?
Size of the Window for the AS-i Input and Output Data
The size of the window for the AS-i input and output data is automatically adjusted to
the AS-i configuration that is transmitted in the Profibus parameter telegram (user-pa-
rameter).
However, you must pay attention to this when configuring the Profibus-DP slave (see
chapter 8.2.3).
Transmission of AS-i Parameters
For the transmission of AS-i parameters the DP-input and output data fields are en-
larged by two bytes each. The AS-i slave address and the AS-i parameters are en-
tered to these bytes. In the output data field, the DP master deposits the AS-i
parameters to be written; in the input data field, the gateway deposits the data read
during the AS-i parameterization.
The AS-i slaves are parameterized sequentially, i. e. only one slave can be parame-
terized in one Profibus cycle. The gateway signals errors of the parameterization by
setting the leftmost bit in the slave address.
Transmission of AS-i Control code
1. these are all devices that were delivered since September 1998; these devices have the following feature string:
„*B..Dc..***....." oder „*B..Dc2.***.....", * is a placeholder for various characters
(this string can be read with AS-i Control Tools with the command Master | Identity)
Subject to reasonable modifications due to technical advances.
Pepperl+Fuchs Group · Tel.: Germany (6 21) 7 76-0 · USA (3 30) 4 25 35 55 · Singapore 7 79 90 91 · Internet http://www.pepperl-fuchs.com
For AS-i/PROFIBUS Gateways with 2 AS-i Masters and/or the ad-
vanced AS-i diagnostics
mode instead of the older advanced mode.
AS-i/PROFIBUS Gateway
1
we recommend to use the professional
Copyright Pepperl+Fuchs, Printed in Germany
Profibus-DP
27
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