Siemens SIMATIC TIWAY 1 - Manual (Page 147)

HOST COMMAND SET REFERENCE
UNILINK HOST ADAPTER 5–62
USER MANUAL
5.6.6 Report Network Manager Buffers Available — 35
The REPORT NETWORK MANAGER BUFFERS AVAILABLE command
returns the total number of Network Manager buffers and the number of
buffers available for allocation to HIUs.
Command: 35
Response: 35 bbbb cccc
Usage: PERFORMANCE
Modes: NM
Parameters:
bbbb The total number of Network Manager buffers.
cccc The number of buffers available for allocation to HIUs.