bihl+Wiedemann 1249 - Commissioning Tools and Accessories; Windows Software AS-i Control Tools

AS-i/PROFIBUS Gateway PROFIBUS-DP
Subject to reasonable modifications due to technical advances Copyright Bihl+Wiedemann, Printed in Germany
Bihl+Wiedemann GmbH · D-68199 Mannheim · Phone +49-621-339960 · Fax +49-621-3392239 · Internet http://www.bihl-wiedemann.de
issue date 7.1.2002
95
8.3.3.5 Restrictions
The SPC3 has available only just 1,5 KByte DP-Ram. Therefore the lengths of te-
legrams and the numbers of DP V1-connections to class 2 masters have to be re-
stricted.
8.3.4 Mailbox example
Command RD_7X_IN: Reading of analog input values
PROFIBUS-DP V0: cyclic data exchange
Used ID/module in the GSD file: 12 bytes management
Meaning of the bytes:
Resonse (if O ≡
≡ ≡
≡ 1)
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
17E
16
2T result
301234567
……
62425262728293031
Restrictions through the SPC3
MSC1
input data
output data
diagnosis
parameters
configuration
SetSlaveAddress
144 bytes
144 bytes
36 bytes
12 bytes
32 bytes
4 bytes
(8 advanced identities)
MSAC1
SAPs
PDU
1
42 bytes
MSAC2
SAPs
PDU
3
42 bytes
Request: RD_7X_IN
Byte 1 50
hex
(RD_7X_IN)
Byte 2 00
hex
(master 1, single master)
Byte 3 1D
hex
(slave address 29)
Byte 4 00
hex
……
Byte 12 00
hex