4-8 Operating the Drive 590 Series DC Digital Drive
Microtach/Encoder Feedback Option Board
The option board assumes a 1000 lines per rev encoder is being used. Speed is set directly by the ENCODER RPM parameter. If you are using an
alternative lines per rev encoder, you must set the ENCODER LINES parameter on the MMI later in the Operating Instructions.
Selecting Speed Feedback
AUXILIARY POWER ONLY IS CONNECTED AT THIS STAGE
Connect the auxiliary power supply to power terminals D7 and D8 (but do not connect the main 3-phase power supply at this
stage). Check that the correct voltage appears between terminals D7 and D8.
The MMI will now display the Welcome screen, and the Health and Overcurrent Trip MMI LEDs will be illuminated
(assuming that the Converter’s control terminals are wired as shown in Figure 3-5, Minimum Connection Requirements).
Use a digital voltmeter to check for the following:
+24V rail at terminal C9, +10V rail at terminal B3, -10V rail at terminal B4
Using the MMI, select the correct speed feedback option. The default is ARM VOLTS FBK.
The selections are ARM VOLTS FBK, ANALOG TACH, ENCODER and ENCODER/ANALOG.
NOTE Refer to Chapter 3: “Optional Equipment” - Speed Feedback Option Boards for further information.
MMI Menu Ma
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