Operating Manual

Chapter 8 Serial Ports, Contact Inputs & Special Fcts Accu-Wave
8-18 TN Technologies
The party-line also behaves erratically when more than one device issues synch characters.
This can happen if there is more than one master on the link, or if synch characters are sent
from a terminal or PC.
Data streaming has to be explicitly turned off in the “Set up port 2 RS485 data
transmission” menu. Deselecting all measurements from data streaming will not inhibit
data streaming. Rather, the gauge will send a default update with all measurements, escape
string positioning, and the “For setup, ...” message. This default update is intended to
appear after a complete NVRAM erasure (i.e., performing a CMD 74), when data
streaming has not yet been configured. Also, the data formatting and update time menus
will not be available until at least one measurement is selected.
Contact Inputs
You can assign commands to be executed based on a user-provided contact input open or
close. The following menu items are available for each contact closure input installed in
your gauge.
Note: If you do not have a current I/O board installed, you will not see the
“Contact closure inputs” options.
“Assign Commands to Execute on Contact Open/Close” Menu
Display Comments
Do nothing command
executed by closing
switch 1. Use↓↓ Chg→→
Press → to scroll through the list of commands until
the one you want is displayed. Commands include,
hold current output at max/min, clear all alarms,
clear all holds, etc.
Do nothing command
executed by opening
switch 1. Use↓↓ Chg→→
Press → to scroll through the list of commands until
the one you want is displayed.Typically, select a
command to reverse the effect of the contact close
command.
Note: These items are repeated for all the contact closure inputs that are installed.