Parker LVD1 - Positioner

Parker Hannifin S.p.A. - Divisione S.B.C. LVD User’s Manual
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Pr62:63 Reserved.
Pr64:65 Reserved.
Pr66:67 Reserved.
Pr68:69 Reserved.
b70.0 Start profile. When set to 1 the programmed profile will be executed. Remember to
set b40.2=1 to effectively transmit the speed reference to the control loop.
b70.1 Manual forward speed. If set to 1 with b70.0=0 and b40.2=1 the axis will move at
the speed programmed in Pr50.
b70.2 Manual reverse speed. If set to 1 with b70.0=0 and b40.2=1 the axis will move at he
speed programmed in Pr50, but with the opposite sign.
b70.3 Wiring test. When this command is transmitted the drive performs a test routine and
returns the result in an ERROR CODE which can be displayed using the two
parameters Pr56 and Pr57. Before transmitting this command make sure that the
motor is disconnected from all loads, including pure inertia loads. Ensure also that
b40.9=0 and b40.2=1.
b70.4 Reserved.
b70.5 Vibration test. If none of the above functions are active, when this bit is set to 1 the
degree of vibration of the motor shaft is evaluated increasing parameter Pr64 by a
value proportional to the level of vibration. The technician is provided with the
facility to read and reset Pr64 if and when necessary.
b70.6 Reserved.
b70.7 Reserved.
b70.8 Reserved.
3.10 Positioner
Operating mode 9 executes a simple trapezoidal profile. For this profile the user must
define acceleration with Pr51, steady speed time with Pr52 and displacement using the double
word format parameters Pr64:Pr65. At each profile execution command, b70.8, the motor
executes Pr64:65 steps (one motor revolution is equivalent to 4096 steps). In the block
diagram note the four different reset types, the availability of servo-error indication and the
possibility of using space control with or without feed forward. The incremental position must
always be positive and if it is not, the absolute value is assumed automatically; movement
direction must be selected with bit parameter b70.4 (b70.4=0 for clockwise rotation).
Displacement can be defined using the drive frequency input. If b70.1=0, feedback is provided
by the resolver, if b70.1=1 feedback is provided by an encoder (X5). Additional features are
available using the internal PLC.
Note that the profile execution command (b70.8) is not performed in a constant time
interval (profile calculation can take anything up to 40 ms). During profile execution, as
indicated by bit b70.7=1, the profile parameters can be modified and the profile can be pre-
calculated by means of b70.15; after this procedure command b70.13 provides profile
execution without jitter caused by the calculation. If command b70.13 is repeated, the last
calculated profile is repeated. Don’t change any profile parameter during calculation
(b70.15=1).