No. 0D: Change_As-I-Slave_Address - Siemens SIMATIC ET 200SP Manual

Using the command interface
9.4 Description of the AS-i commands
9.4.14

No. 0D: Change_AS-i-Slave_Address

Meaning of the command
This command changes the AS-i slave address of an AS-i slave.
This command is used predominantly for adding a new AS-i slave with the default
address "0". In this case, the address is changed from "AS-i slave address, old" = 0 to
"AS-i slave address, new".
The change is only executed if the following conditions are met:
1. An AS-i slave with "AS-i slave address, old" must exist.
2. If "AS-i address, old" is not equal to "0", an AS-i slave with the address "0" must not be
connected at the same time.
3. "AS-i slave address, new" must have a valid value.
4. An AS-i slave with "AS-i slave address, new" must not already exist.
Note
When changing the AS-i slave address, the AS-i slave is not reset. The output data of the
AS-i slave are retained until the slave resets its data automatically by internal time
watchdog monitoring or the slave receives new data at the new address.
Today's AS-i slaves mostly feature watchdog monitoring that reset the internal I/O data of
the slave when cyclic communication with the AS-i master is interrupted. Check the
technical data of the slave to find out whether it features watchdog monitoring.
Structure of the job data in the send buffer
Table 9- 25 Structure of the job data in the send buffer
Byte Meaning
0 Command number: 0D
1 Slave address, old
2 Slave address, new
120
H
AS-Interface master CM AS-i Master ST (3RK7137-6SA00-0BC1)
Manual, 07/2017, A5E02655262020A/RS-AD/004