User manual

Chapter 4 Configuration
Page 67 ©February 2009
4.6.4 Number of TX only transmissions
Under I/O mappings and Block mapping’s is an
option for the 105G to send messages as a
Transmit only. By default under each section all
messages will be acknowledged. Uncheck the
Acknowledge Message box to make the
transmission TX only.
In the unit details section a Configurable number
of TX only transmissions are available between
1 – 5.
As a Change of State occurs or Timed Update
expires each message will be sent this number of
times.
Note: If setting Number of TX only
transmissions to 1 ensure you have a good radio
path and/or use Output reset times at destination
to indicate comms fails.
4.6.5 Reset on Buffer Empty (Firmware version 1.83 and later)
The 105G has a series of internal buffers that are used for moving I/O between the Radio
Interface, I/O Database and Fieldbus Interfaces. There are a number of different buffers that the
105G uses and a list of these can be found in section 4.16 ‘Access to Message Buffer Count’.
The option of Reset Buffer on Empty will allow the 105G to be fully reset (clear its buffers) if it
every runs out of buffer space. By default this is disabled and can be used in applications of
when a 105G is used as a repeater where there is excessive traffic and also in marginal radio
paths. As each message is passed via a repeater it will buffer this message in a queue and then
forward on and wait for ACK before it clears the buffer. If system is experiencing high radio
message count and poor radio path creating number of retries, cases could exist that the buffers
will empty. Enabling the Reset on Buffer Empty feature will reset the module and then continue
to operate.