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Reference Manual
00809-0100-4444, Rev AC
Section 5: Advanced Configuration Functionality
January 2015
Advanced Configuration Functionality
Note
The totalizer value is stored in the non-volatile memory of the electronics every three seconds. If
power to the transmitter is interrupted, the totalizer value will start at the last saved value when
power is reapplied.
5.2.4 Discrete input/output
This configuration option is only available if the auxiliary output suite (option code AX) was
ordered. The auxiliary output suite provides two channels for control. The discrete input can
provide positive zero return (PZR) and net totalizer reset. The discrete output control function
can be configured to drive an external signal to indicate zero flow, reverse flow, empty pipe,
diagnostic status, flow limit, or transmitter status. A complete list and description of the
available auxiliary functions is provided below.
Discrete input options (Channel 1 only)
PZR (Positive Zero Return). When conditions are met to activate the input, the
transmitter will force the output to zero flow.
Net Total Reset - When conditions are met to activate the input, the transmitter will
reset the net total value to zero.
Discrete output options
Reverse Flow - The output will activate when the transmitter detects a reverse flow
condition.
Zero Flow - The output will activate when a no flow condition is detected.
Transmitter Fault - The output will activate when a transmitter fault condition is
detected.
Empty Pipe - The output will activate when the transmitter detects an empty pipe
condition.
Flow Limit 1 - The output will activate when the transmitter measures a flow rate that
meets the conditions established for the flow limit 1 alert.
Flow Limit 2 - The output will activate when the transmitter measures a flow rate that
meets the conditions established for the flow limit 2 alert.
Diagnostic Status Alert - The output will activate when the transmitter detects a
condition that meets the configured criteria of the diagnostic status alert.
Total Limit - The output will activate when the transmitter net total value meets the
conditions established for the total limit alert.
Channel 1
Channel 1 can be configured as either a discrete input (DI) or as a discrete output (DO).