3/10/2023 0 Comments Uniplayer wont workThe speed reference is able to be applied in several methods. There could be an issue with the speed reference to the drive if the display shows Run but the motor isn’t turning. The drive still may not run if the digital inputs and the drive sequencer are each working properly. This decimal value can be converted to a binary value.To see the function that will be carried out, you can reference the binary value to the chart below. The drive will now accept a decimal value from 0 to 32767 at #6.42. ![]() When #6.43 = 1 the control word is enabled. To control the start/stop functions, the drive does not have to use the digital inputs. Check the digital input configuration in menu 8 if menu 6 isn’t changing and the voltage is. The DC voltage should change between 0VDC and 24VDC when a command is given. The voltage on the corresponding digital inputs should be measured if the parameters in menu 6 aren’t changing state accordingly. #6.29 = 1 = Hardware Enable (Pin 31 is activated) #6.43 = 1 = Control word disabled, Set to 1 for Field Buss Control The digital inputs may be configured wrong or inactive if the parameters are not going to a 1 with the corresponding commands. When the drive is not running, there are several additional parameters in menu 6 that can assess the issue. The drive should operate as seen above if the digital inputs are activated correctly. The digital inputs will select the enable, run, and preset selections. The speed reference will come in on an analog input if you choose a terminal code. Then, the keypad can be used to control the drive and to set the speed reference. You will only need to close the enable signal if it is set to pad. This will tell the drive where to search for run commands and speed references. Parameter #0.05 sets up the Reference Select. When the drive is in the terminal mode the following sequence occurs under default conditions: Unidrive SP: Inh = Drive disabled = Connect pins 22-31 drive should go to rdy Rdy = Drive enabled = Connect pins 22-26 drive should go to run Run = Drive is enabled and ready to run when a speed reference is applied The Unidrive SP can be enabled to run in numerous ways. The +24VDC can be supplied by the drive or externally. When the drive is in positive logic you will need to inject +24VDC to activate the digital inputs. The Unidrive SP defaults to positive logic. The logic type is set up at #8.29 in the Control Techniques Unidrive SP. The drive can be programmed to use positive or negative logic. The drive will display inh, rdy, or run depending on the given commands. ![]() The drive can use digital inputs, keypad, or a field buss networks to give the OK to run. The Unidrive SP can be enabled to run in several ways. Updated August 2019: Click here to view Unidrive fault codes. Emerson Industrial Automation: Unidrive SP Troubleshooting
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