User manual

WI-GTWY-9-xxx Wireless Gateway V1.18
60
4.5.4 Real-Time
The block mapping message can be sent at a real-time by setting the “Period” value. In this
example, “period” is set to 6 minutes - the message will be sent every 6 minutes starting at the
beginning of each hour. That is, the message will be sent at XX:00, XX:06, XX:12, XX:18,
XX:24 …. XX:54 - where XX represents any hour of the day.
If “Period” was set to 1 minute, then the message would be sent every minute, on the minute.
The “Offset” value provides an offset to the specified time. In this example, if the “Offset” was
set to 10 seconds, then the messages will be sent 10 seconds later - at XX:00:10, XX:06:10,
XX:12:10 etc.
The reason for the offset is to stagger messages with the same time setting. For example, if you
configure 5 block mappings all to be sent at 10 minutes, then the WI-GTWY-9-xxx will try to
send these messages at the same time - some of the messages will have to wait until the earlier
messages have been sent. If you are sending Read messages as well as Write messages, then the
return messages could clash with outgoing messages.
To avoid this, you can delay some messages using the Offset feature. For example, if you have 5
mappings to be sent at 10 minutes, then the first could have zero offset, the second 3 sec offset,
the third 6 sec offset etc.
If you do not wish to have a real-time trigger, set “Period” to continuous.
If you want the block mapping to be sent only on real-time (and not on change as well), select
the “Disable” box in the bottom left hand corner - this disables change messages for this block
mapping.