If, for example, the Absolute target is set to 600, and the Offset to 200, the channel will move to 400.Continuous monitoring of arterial hemoglobin oxygen saturation by pulse oximetry has been a standard of care in the operating room since 1990 and in the recovery room since 1992.* Despite universal agreement on the importance of pulse oximetry monitoring, little progress has been made in reducing the incidence of failure to display valid data. The channel uses this value to set the reference point for the next move operation. Use this to set a Home position for Move operations set to Absolute Position This turns Off after the values have been read.ġ - Currently in motion ( function cannot be performed during acceleration or deceleration) Note that the resolution of velocity is according to the units set in the PTO Configuration Use these as a reference for Move functions Use this to ascertain the current position. Stops motion according to the rate of deceleration set in the PTO Configuration. Intended to cause an immediate, emergency stop with no regard for position or any other parameter (requires parameter reset) The Move velocity must be greater than the Start/Stop velocityģ - Channel not initialized, or Vision outputs do not support functionĤ - Absolute Movement cannot be performedĥ - Currently in motion ( function cannot be performed during acceleration or deceleration) Here the movement is relative to the current position. This causes movement to the exact position requested, without considering the current position. In this function you determine the parameters of movement. Legal values are from 1 to 16, where 1=trapezoidal curve and 16 =perfect S.Ģ - Currently in motion ( function cannot be performed during acceleration or deceleration)Ĥ - PTO Configuration block does not exist Note that the resolution of velocity is according to the units set in the PTO Configuration.Ĭontrolling for jerk influences the shape of your motion curve. These parameters determine the limits of the motion profile for the channel. Note the minimum and maximum ranges for your motion profile. Use Set Profile to define the motion profile for a particular Channel in the configuration. Note - To control your output using straight frequency, set 1 pulse = 1 unit.Ĭalculate Frequency to Units according to the followingĢ - VisiLogic/OS mismatch this OS versionģ - Vision outputs do not support functionĦ - Unit or Pulse per Unit exceed limits (1-1000)Ĩ - Currently in motion ( function cannot be performed during acceleration or deceleration) Note that neither values for Unit nor Pulses per Unit may exceed 1000 This is where you determine the number of pulses per Unit. This can be helpful to fix cases where the output wiring is reversed. Switch reverses the tasks of the PTO outputs that are assigned to the channel in modes Pulse + Direction or CW/CCW.
The tables in the previous section give all possible combinations and output assignments, based on model. Those not available are disabled.Ī Channel comprises the inputs used to carry out the PTO function, and determines their function In this function you select a Vision model, which determines the available Channels and Modes.
These are located on the Ladder toolbar, under the Utils menu. The following table shows all of the possible PTO mode combinations for this model. It is the user's responsibility to implement those safeguards required by his system, such as override and/or emergency stop mechanism. These functions are based on programming logic, and therefore do not have the safeguards generally provided by electro-mechanical controls. When an Output is not being used in a channel, it may be used as a general-purpose output (not high-speed) The following tables show the possible combinations, according to Vision model. The number of channels, the possible modes, and the outputs used to implement them vary from model to model. Uses 2 high-speed outputs, one for clockwise, the other for counter-clockwiseĪ Channel comprises the outputs that are required to implement a Mode. Uses 2 high-speed outputs, one for the pulse, and the second to control direction Note that the PTO control functions are open-loop, and do not rely on positional feedback. In this way you can, for example, build speed profiles that are appropriate for stepper motors. You can implement motor control by controlling the high-speed outputs of certain Vision controllers, and the EXF-RC15 Remote I/O, using PTO functions, controlling up to three independent axes. PTO Functions: Simple Motion Control PTO Functions: Simple Motion Control