Siemens CP 243-2 User Manual

Command Interface

5-27

SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02

With this call, the status register of the addressed AS-i slave can be read out.

Depending on the type of AS-i slave, the flags of the status register have the
following meaning:

Status
Bit

AS-i slave complying with standard 2.0

AS-i slave complying with standard
2.1

S 0

This flag is set
when the internal AS-i slave routine for permanent storage of the AS-i slave
address is active. This can take up to 15 ms and must not be interrupted by a
further addressing call.
when the AS-i internal slave address comparison recognizes that the stored
address is not the same as the entry in the address register.

S 1

This flag is set when the AS-i slave has
recognized a parity error in a received
frame since the last “read and delete
status” job.

An AS-i slave can set this flag when
it has detected and error (for
example wire break) in the attached
I/Os.

S 2

This flag is set when the AS-i slave has
recognized an end bit error in a frame
since the last “read and delete status” job.

reserved

S 3

This bit is set when the AS-i slave has detected a read error when reading the
non-volatile memory.

2

0

Command number: 0F 

H

2

1

AS-i slave address