Write_Parameter_String - Siemens SIMATIC NET IE/AS-INTERFACE LINK PN IO Manual

8 Using the Data Record Interface
8.2.2.9

Write_Parameter_String

Meaning
With AS-i slaves with profile 7.4, this call can be used to send a parameter string to
the AS-i master that then forwards this to the specified AS-i slave address.
The call transfers a parameter string with a maximum of 220 bytes. The actual
number of parameter bytes to be sent to the AS-i slave is calculated by the AS-i
master from byte 2. The maximum number of parameter bytes is 220.
The remaining information in the string is not evaluated by the AS-i master and is
passed on to the AS-i slave transparently. As long as the string transfer is active,
there is no user/analog data exchange with the addressed AS-i slave.
Structure of the RecordDataWrite service − Index 28
Byte
Bit 7
0
1
2
3
4
...
221
222
IE/AS−INTERFACE LINK PN IO
160
Bit 6 Bit 5 Bit 4
Version_hi = 0x00
Version_lo = 0x00
Number of string bytes
String byte 219 (may be irrelevant)
String byte 220 (may be irrelevant)
as of hardware version 1, as of firmware version V2.0
Meaning
Bit 3 Bit 2
String byte 1
String byte 2
...
Bit 1 Bit 0
Release 08/2018
C79000−G8976−C216−03