Siemens SIMATIC TIWAY 1 - Manual (Page 126)

HOST COMMAND SET REFERENCE
UNILINK HOST ADAPTER 5–41
USER MANUAL
ffff The number of times the HIU has been issued a SNRM by the
Network Manager.
gggg The number of times the HIU has been issued a DISC by the
Network Manager.
hh When set to 01, this parameter indicates that the Network
Manager has reinitialized the HIU with a different
configuration. This will happen whenever the Network Manager
is reset, causing it to reinitialize each HIU on the network. This
parameter will not be cleared by the ‘rr’ reset option.
ii This parameter indicates whether the HIU has been granted
permission to issue a DISC.
00 = DISC permission not granted.
01 = DISC permission granted.