TSAT 3000 - Telemetry and data transfer via SATellite
TSAT 3000 Configuration Parameter Description, January 2013 Page 72 of 124
3.10.5 NET_MAX_POLL_SECONDS
Default 120, Range 30…3600
HUB: Number of seconds the HUB will search for an RT (without being able to get in-lock),
before HUB is starting to poll the next RT. See
NET_{FIRST | START | LAST}_POLL_RT.
RT: Number of seconds the RT will search for the HUB (without being able to get in-lock), before
RT will RESET itself (or try to get in-lock to Backup-HUB when
PHL_TX_HUB_FREQUENCY_BKUP is different to zero).
The RT will also RESET itself (or try to get in-lock to Backup-HUB) when HUB is searching for
this
RT, the RT is in-lock to HUB, and it has returned POLL_ACK packets for
NET_MAX_POLL_SECONDS x 0.75 seconds to the HUB (which obviously cannot find the RT
carrier).
NET_MAX_POLL_SECONDS is one of the parameters that are controlling the CCU’s safety
mechanisms. If unit for some reason isn’t able to get in-lock, it will RESET itself. First time, it will
just shut down and restart the CCU software. If it still isn’t able to get in-lock, it will RESET Main-
Unit next time (Ver 30.0.0: Software reset – Ver >= 30.1.0: Hardware reset).
An RT will always first
try to get in-lock to Backup-HUB (when PHL_TX_HUB_FREQUENCY_BKUP
is different to zero) before it RESET itself.
The RT safety mechanisms are:
• RT has searched for HUB carrier
NET_MAX_POLL_SECONDS without getting in-lock.
• HUB has polled this RT for more than
NET_MAX_POLL_SECONDS x 0.75 seconds.
• RT has received more than
LCC_MAX_LINK_RETRIES LINK_RESET packets from HUB.
• RT has sent more than
LCC_MAX_LINK_RETRIES LINK_RESET packets to HUB.
• No OK packets have been received the last 20 minutes.
• Link hasn’t been Open the last 20 minutes (but not
when Link is DISCONNECTED or operating
in LISTEN-Mode enabled by bit 14 (0x4000 –
UTILITY_CCU_LISTEN_TO_CCU) in
UTL_UTILITY_MASK).
The HUB safety mechanisms are:
• HUB has searched for all RTs in
NET_{FIRST | START | LAST}_POLL_RT search range (each
RT
NET_MAX_POLL_SECONDS) without getting in-lock.
• No OK packets have been received the last 20 minutes.
You may disable these safety mechanisms (and also some other safety mechanisms) by setting
Bit 8 (0x100 –
UTILITY_TUT_OG_KJOR) in UTL_UTILITY_MASK.
RT Ver <= 31.4.0 – Known Errors
•
NET_MAX_POLL_SECONDS > 80 cannot be used. RT will not RESET (or try to search for
Backup-HUB) when value is larger than the time RT use to read & search 20 Spectrums. That
is minimum 80, typical 120…180 seconds.
• RT would RESET itself after 20 minutes inactivity, but not
try to search for Backup-HUB.
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