B.4 Data logger call-back
Call-back is the ability of a remote site to initiate a call to
LoggerNet
and have
LoggerNet
call back
to collect data. Call-back is supported in networks consisting of RF451/RF452s as the single
communications device.
In a mixed-communications devices network, for example, phone to RF451/RF452, the base site
makes the transition between communications types. Call-back is NOT supported when the base
RF451/RF452s Active Interface is configured as CS I/O ME Master. The RF451/RF452 Active
Interface is configured as CS I/O ME Master when the CS I/O port is used for direct connection to
an ME device such as a COM220 or MD485). The connection is done by using an A100.
In this example, the RF451/RF452s are set up as described in
RF451/RF452 radio communications
(p. 27). In the following program the data logger will send a
variable named
Callback
to
LoggerNet
(PakBus address 4094) when the
CallbackFlag
variable is true. After
LoggerNet
receives the variable
Callback
it will begin collecting data from
the data logger and store it into a file based on the data collection settings in the
LoggerNet
Setup screen. Note that the PakBus Port in the
LoggerNet
Setup screen must have PakBus Port
Always Open selected.
RF451/RF452 Spread Spectrum Radio
38
