Echelon FTXL - Manual (Page 235)

FTXL User’s Guide 223
6. In the Select Network Variable Type dialog, expand
C:\LonWorks\Types\STANDARD.FMT and select either SNVT_volt or
SNVT_volt_mil. Click OK to change the type and close the Select
Network Variable Type dialog.
Important: You can only change the type for a network variable if it is
not bound to the network. LonMaker implicitly binds network variables
when you enable monitoring from the LonMaker drawing (from the
drawing itself or from any connections to the functional blocks) or the
LonMaker Browser window. Thus, you must disable monitoring for both
the nviVolt and nvoVoltFb network variables.
To verify that the type changed successfully:
1. Within the LonMaker Browser window, select the row for the nviVolt
network variable.
2. Right-click the nviVolt network variable and select Properties to open the
Network Variable Properties dialog.
3. On the Description page of the Network Variable Properties dialog, the
Type name field displays the current type for the network variable. The
current type should be either SNVT_volt or SNVT_volt_mil.
The valid range for the value of the nviVolt and nvoVoltFb network variables
depends on its current type:
• For nviVolt as SNVT_volt: ± 1.6 V
• For nvoVoltFb as SNVT_volt: ± 3.2 V
• For nviVolt as SNVT_volt_mil: -1638.4 mV to +1638.3 mV
• For nviVolt as SNVT_volt_mil: -3276.8 mV to +3276.6 mV
Important: Be sure to change the type to either SNVT_volt or SNVT_volt_mil,
not to SNVT_vol, SNVT_vol_mil, or any other type. If you change the type to an
invalid type, the dynamic interface example application rejects the change and
disables the NodeObject and VoltAmplifier functional blocks. In this case, you
must re-enable the functional blocks:
1. Change the type for either the nviVolt or nvoVoltFb network variable to a
valid type, SNVT_volt or SNVT_volt_mil.
2. Within the LonMaker drawing, right-click the NodeObject functional
block and select Manage to open the LonMaker Device Manager dialog.
3. From the Functional Blocks tab of the LonMaker Device Manager dialog,
click Enable to re-enable the functional block. Click Test to verify that
the output for the functional block displays “Diabled: 0”, which signifies
that the functional block is not disabled.
Adding Dynamic Network Variables
To add a set of dynamic network variables to the FTXL device to demonstrate a
logical circuit as described in
The Dynamic Interface Example Application on
page 202:
1. Open the LonMaker drawing for the FTXL device.
2. Ensure that the FTXL device is properly configured and commissioned.