| First, it should be noted that drivers
have default values for these parameters. During development the
best combination of default values for these values is setup based
on our results from testing and our experience with all drivers. We
advise that the standard parameter entries are not altered from
their defaults unless otherwise advised by Citect support.
The parameter 'Timeout' specifies how many milliseconds the
driver will wait for a response to a request before regarding that
request as failed (and either doing a retry or returning an error
to Citect). The time should be long enough to avoid false errors.
But, if set too long then Citect will wait needlessly after an
error and this will increase the time taken to trigger a redundancy
swap over.
For a serial protocols the Timeout time is usually set to around
1000 mS (i.e. 1 seconds). However the value should be determined by
from experience with the protocol. Many drivers using network
protocols can support timeouts of less than 1 second.
|
