Setup guide

Setting Configuration Parameters
18
If the amount of time the power was off is
greater than the specified Power Fail Timeout,
DOs will be set to 0 (FALSE), and AOs will be
set to the "User Configured Output" value.
Power Fail Timeout is
set to 65,535 seconds.
AOs and DOs will be set to the last state they
were in prior to the power failure.
2
NOTE: In the event of a Watchdog failure (CPU failure, but power is not
lost), AOs will be set to the "User Configured Output". When the system
attempts to restart, and if the restart is completed before expiration of the
Power Fail Timeout, AOs will then be set to the last output they had prior
to the Watchdog failure.
Host Comm Loss
Timeout
The Host Comm Loss Timeout determines how certain outputs are
affected if the I/O Rack loses communications with its host
ControlWave controller. Enter a time in seconds.
If you enter a value of 0 for the "Host Comm Loss Timeout", outputs
will be left unchanged in the event communications are lost with the
host.
The table, below, describes how the length of time communications are
lost affects the outputs:
Length of Time Communication
was lost with the Host Controller
Affect on Outputs
If the communications were down
for less than or equal to the Host
Comm Loss Timeout…
Do not change outputs
If communications were down for
more than the Host Comm Loss
Timeout
DOs are set to 0 (FALSE), and
AOs are set to the "User
Configured Output" value.
IMPORTANT: The affect on outputs (see table above) via the Host Comm
Loss Timeout feature is suspended if “Serial Failover Enabled” is
checked, and
serial MODBUS communications are functioning. If
communications with the host are lost and
serial MODBUS
communications fail as well, and the Host Comm Loss Timeout has
expired, however, outputs will be set according to the table, above.