bihl+Wiedemann 1249 - Read Parameter (READ_PI)

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
65
AS-i master specification. The AS-i slave response is returned as a parameter
echo in the response data.
Meaning of bit B:
B = 0 Single AS-i slave or A-slave
B = 1 B-slave
8.3.2.7 Read Parameter (READ_PI)
This call returns the current parameter value (actual parameter) of an AS-i slave
sent by the AS-i/PROFIBUS Gateway.
This value must not be confused with the parameter echo that is supplied by the
AS-i slave as a response to the write_parameter job.
Meaning of bit B:
B = 0 Single AS-i slave or A-slave
B = 1 B-slave
Request
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
102
16
2T – circuit
3 – B slave address
4– parameter
Response
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
102
16
2T result
3 – slave response
Request
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
103
16
2T – circuit
3 – B slave address
Response
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
103
16
2T result
3– PI