Emerson Micro Motion 9739 MVD, Configuration And Use Manual

Page: 133 / 254

Integrate the meter with the control system
7.2.2 Configure
Frequency Output Maximum Pulse Width
Display Not available
ProLink II ProLink→Configuration→Frequency→Freq Pulse Width
Field Communicator Configure→Manual Setup→Inputs/Outputs→Frequency Output→FO Settings→Max Pulse Width
Frequency Output Maximum Pulse Width is used to ensure that the duration of the ON signal is great enough
for your frequency receiving device to detect.
The ON signal may be the high voltage or 0.0 V , depending on Frequency Output Polarity , as shown in
Table 7-5 .
Table 7-5 Interaction of
Frequency Output Maximum Pulse Width
and
Frequency Output Polarity
Polarity Pulse width
Active High
Active Low
Procedure
Set Frequency Output Maximum Pulse Width as desired.
The default value is 277 milliseconds. You can set Frequency Output Maximum Pulse Width to 0 milliseconds
or to a value between 0.5 milliseconds and 277.5 milliseconds. The transmitter automatically adjusts
the value to the nearest valid value.
Tip
Micro Motion recommends leaving Frequency Output Maximum Pulse Width at the default value. Contact
flow.support@emerson.com
before changing Frequency Output Maximum Pulse Width .
7.2.3 Configure
Frequency Output Polarity
Display OFF-LINE MAINT→OFF-LINE CONFG→IO→FO→POLAR
ProLink II
ProLink→Configuration→Frequency→Freq Output Polarity
Field Communicator Configure→Manual Setup→Inputs/Outputs→Frequency Output→FO Settings→FO Polarity
Frequency Output Polarity controls how the output indicates the ON (active) state. The default value,
Active High , is appropriate for most applications. Active Low may be required by applications that use
low-frequency signals.
Configuration and Use Manual
127