Configuration and Use Manual 55
Required Transmitter Configuration
Required Configuration Optional ConfigurationUsing the TransmitterFlowmeter Startup
The flow switch has a 5% hysteresis. For example, if the setpoint is 100 lb/min, the flow switch will
be triggered when the flow rate falls below 100 lb/min, but not turned off until a 5% (5 lb/min) change
occurs (i.e., the flow rate rises to 105 lb/min).
If Flow Switch is assigned to the discrete output, you must specify the flow variable that the switch
will represent, and you must configure the flow switch setpoint.
6.7.3 Fault action
If the transmitter encounters an internal fault condition, it can set the discrete output to either ON or
OFF. See Table 6-19.
Note: By default, the transmitter immediately reports a fault when a fault is encountered. You can
delay reporting faults by changing the fault timeout. See Section 8.9.
6.8 Configuring the discrete input
Note: This section is applicable only if Channel B has been configured as a discrete input. See
Section 6.3.
The discrete input is used to initiate a transmitter action from a remote input device.
If Channel B is configured as a discrete input, you must configure the parameters listed in Table 6-20.
Table 6-20 also shows the names used for each parameter by the display, ProLink II, and the
Communicator.
To configure the discrete input, see the menu flowcharts in Figure 6-11. For details on discrete input
parameters, see Sections 6.8.1 and 6.8.2.
Note: The ProLink II and Communicator menus described here are also used to assign actions to
events. To configure events, see Section 8.7.
Table 6-19 Discrete output fault actions
ProLink II Communicator Fault state
Discrete output voltage
Polarity = Active high Polarity = Active low
Upscale Upscale Fault ON (site-specific voltage) ON (0 V)
No fault Discrete output is controlled by its assignment
Downscale Downscale Fault OFF (0 V) OFF (ste-specific voltage)
No fault Discrete output is controlled by its assignment
None (default) None (default) Not applicable Discrete output is controlled by its assignment
Table 6-20 Discrete input configuration parameters
Parameter name
ProLink II Communicator Display
Assignment Discretes ACT
Polarity DI 1 polarity POLAR
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