National Instruments MID-7654 User Manual And Specifications

Also see for NI MID-7652: Overview User guide

National Instruments MID-7654 User Manual And Specifications Manual pdf 8 page image

© National Instruments Corporation 7 MID-7654/7652 Servo Power Motor Drive User GuideBoth the AC POWER and ENABLE switches can inhibit the servo amplifiers. However, as long as theAC POWER switch is on, only the servo amplifier output stages are disabled. The remaining circuitryremains active, including the quadrature encoder circuit.Caution You must change the MID-7654/7652 main input fuse on the rear panel if you changethe line voltage from the factory setting. Refer to the Specifications section of this guide for fusespecifications. Refer to the Modifying the Power Entry Module section for more information onhandling the power entry module.Host Bus Interlock CircuitThe MID-7654/7652 has a host bus interlock circuit that monitors the presence of +5 V from the hostcomputer and disables the MID-7654/7652 when the voltage is not present or falls out of tolerance. Thiscircuit shuts down the servo amplifiers for all axes by activating the inhibit when the host computer isdisconnected from the MID-7654/7652 or inadvertently shut down. Activation of the host bus interlockcircuitry illuminates the yellow LEDs (middle row) of the LED status array for all axes. See the FrontPanel LEDs section of this guide for more information.Front Panel LEDsThe front panel LEDs consist of a single green LED to indicate if the main 5 V power is active. If theDC power supplies are active, the green power LED illuminates. If this LED fails to illuminate, checkthe power cord and the main input fuse on the front panel.An LED status array of 3 rows by 4 columns on the MID-7654 or 3 rows by 2 columns on the MID-7652provides a variety of status information. Refer to Figure 1 for the location of the front panel LEDs. TheLED status array is arranged by motor axes. Each of the four columns represents an axis, and each ofthe three rows represents a particular status. Table 1 summarizes the axes and statuses to which thedifferent LEDs in the 3 × 4 or 3 × 2 array correspond.Amplifier Fault Output LEDsThe top row of the LED status array indicates the status of the amplifiers. A red LED indicates anovercurrent condition, a short circuit condition, an over temperature condition, or a problem with themotor bus voltage on that axis.Amplifier Inhibit LEDsThe middle row of the LED status array indicates if a motor axis is inhibited. An axis is inhibited andthe LED illuminates yellow if the host bus interlock circuitry is activated from the back panel, if theENABLE switch on the front panel is in the inhibit position, if the motion controller’s inhibit signal islow, or if the per-axis inhibit input is actively driven. You can select the polarity of the per-axis inhibitinput from the front panel DIP switches. See the Front Panel DIP Switch Settings section of this guidefor more information.Table 1. Front Panel LED IndicatorsStatus Motor AxisAmplifier Fault Output (red) 1 2 3* 4*Amplifier Inhibit (yellow) 1 2 3* 4*Limit Status (green) 1 2 3* 4** These LEDs only appear on the MID-7654.