Figure 8-10
Negative flow - channel 3 lags by 180°
8.2.6.5
Digital output
The status output can be used to show alarm status or to control the dosing and it can be
signaled on Signal Output or Relay Output.
Depending on the Alarm Mode setting, multiple alarms can be signaled on the output and
selected from the alarm class or the Individual alarms lists.
● Alarm Class: Alarm will be signaled if alarm within the selected alarm class occurs.
● Individual alarms: Alarm will be signaled if selected Individual alarms occurs. It is possible
to select more multiple alarms to be signaled.
Note
Alarm class
The alarm class options depend on the Alarm Mode setting, either NAMUR or Standard
(Siemens Standard), selected in menu item 2.8.11. Both NAMUR and Siemens Standard
alarms and their messages are described in more detail in Fault codes and corrective
The control output can be used for controlling discrete valve dosing and analog valve dosing as
described in Dosing (Page 145).
8.2.6.6
Input
If the input is activated with a logic signal (15 - 30 V DC), the meter carries out an activity
selected in the menu.
The following input options are available:
● Start dosing
● Hold / continue dosing
– When this function is activated, it will pause the dosing. When it is deactivated, the
dosing will continue
● Stop dosing
– Sets the digital output to "Off" and resets the dosing counter
● Zero adjust
– Starts the automatic zero point adjustment. This function employs the existing
configurations and presumes that the process conditions are prepared for the zero point
adjustment routine
Parameter assignment
8.2 Functions
SITRANS FC330
144
Operating Instructions, 01/2019, A5E44030648-AB