Dynalco AF-900PC Air/Fuel Ratio Controller - Manual (Page 38)

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Pickup Threshold (mV): Selects the speed input voltage sensitivity from the drop
down menu. A setting of 1000 mV will work for most applications. At this setting a
minimum pickup input voltage of 1.000 peak ( 0.707 VAC RMS) is required. Used
only when magnetic pickup is used for speed input.
RPM Selector: Selects which speed input source will be used to determine that the
engine is running. When clicked ON, the speed contact closure will be used to
signal a run condition.
NOTE: Engine RPM cannot be displayed when using the contact closure
speed input.
When clicked OFF the magnetic pickup speed input will be used to determine
engine speed.
Relay Action Configuration:
The three drop down menus in this section determine the control action for the
Alarm, Shutdown, and Auxiliary Relays. Select the desired control action for each
relay from the description below:
NE: The relay is normally energized and will de-energize while in the tripped state.
ND: The relay is normally de-energized and will energize while in the tripped state.
LNE: The relay is normally energized and will latch in the de-energized state when
a trip occurs. The latched relay trip condition may be cleared by pushing the front
panel RESET key.
LND: The relay is normally de-energized and will latch in the energized state when
a trip occurs. The latched relay trip condition may be cleared by pushing the front
panel RESET key.
10.4 Communication Settings Dialog
This dialog (Fig. 18) is displayed when you click on the communication settings
label in the control panel.
The AF900PC is configured by default with the settings shown in Figure 18. The
settings can be recalled at any time by pressing the Defaults button.
Use this screen to change the COM port number to match the serial port being
used by your computer.
NOTE: All other parameters are fixed by the AF900PC firmware and changing
them will cause a communication failure.