ONICON D-100 LonWorks - Manual (Page 12)

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D-100-LON Network Interface Installation Guide 05/14 - 0658-4 / 18342
Page 12
1.7.3 Input Network Variables
The D-100-LON Flow Display receives remote commands to reset totals from the network
using Standard Network Variable Types (SNVTs). The input network variables are in ASCII
format. They are used to zero the flow and auxiliary pulse totals transmitted in the output
variables listed in section 1.7.1.
The ASCII character reset input network variables are described in the table below.
Column 1 contains a brief description of the network variables. Column 2 contains the
network variable names. Column 3 contains the Lon SNVT used for each variable. Column
4 contains the ASCII single characters that must be transmitted to the meter along with a
description of what they indicate.
ASCII RESET INPUT NETWORK VARIABLES
Description Variable Name SNVT Name Valid Characters*
Reset Energy-1** nviResetBTU1a ANVT_char_ascii
Write an ASCII 1 (49) to reset the selected
total. Once the total has reset, change the
value to back to ASCII 0 (48).
Reset Volume-1 nviResetVol1a SNVT_char_ascii
Reset Energy-2** nviResetBTU2a SNVT_char_ascii
Reset Volume-2 nnviResetVol2a SNVT_char_ascii
Reset Auxin1 (Di3) nviResetAuxIn1a SNVT_char_ascii
*Systems that are not set to decode ASCII characters will use and display the decimal equivalent. These values
are shown in parentheses.
** These variables are present but not used by the standard D-100.
1.7.4 Node Object Network Variables
The D-100 LON Flow Display node object utilizes one output network variable and one
input network variable. These are described in the table below.
NODE OBJECT NETWORK VARIABLES
Description Variable Name SNVT Name
Node object control input nviRequest SNVT_obj_request
Node object response output nvoStatus SNVT_obj_status
1.7.4.1 nviRequest
Five input variable requests have been implemented. These are listed in the table
on the next page. Three of the requests are mandatory functions. They are
Normal, Update Mask and Report Mask. The other two are used to reset totals in
the Btu meter. They are Reset and Clear Reset.
The requests can be used on the node object or on selected function blocks. The
tables on the next page describe the requests and the function blocks associated
with totals in the display.