Siemens SIMATIC TIWAY 1 - Manual (Page 103)

HOST COMMAND SET REFERENCE
UNILINK HOST ADAPTER 5–18
USER MANUAL
jjjj The number of valid RESET ADAPTER commands processed.
kkkk The number of polls transmitted to secondaries.
llll The number of TIWAY I HDLC I–Frames transmitted to
secondaries.
mmmm The number of network errors including CRC errors, timeouts,
aborts, and the loss of RS–232–C/RS–423–A control signals.
nnnn The number of TIWAY I HDLC I–Frames received.
oooo This value will always be zero.
pppp The number of TIWAY I HDLC errors including command rejects
(FRMR), invalid HDLC responses, and sequence errors.
qqqq This value will always be zero.
rrrr The number of times that secondaries have been initialized as
a direct request by the HIU.
ssssssss This value will always be zero.