Siemens SIMATIC TIWAY 1 - Manual (Page 93)

HOST COMMAND SET REFERENCE
UNILINK HOST ADAPTER 5–8
USER MANUAL
5.3.1 Send Network Data — 01
The SEND NETWORK DATA command sends a specified host Primitive to a
network secondary via the Network Manager. Once the Primitive has been
received by the secondary, the Network Manager polls the secondary for the
Primitive response and returns it to the issuing HIU. The HIU then forwards
the Primitive response to the attached host computer.
Command: 01 aa pppp...
Response: 01 aa pppp...
Usage: OPERATION
Modes: MHIU/EHA, HIU/EHA, MHIU, HIU
Parameters:
aa The secondary address to receive the Primitive data.
pppp The TIWAY I Primitive data (command or response). This
parameter begins with the length field of the Primitive.