Entering acquisition parameters for an incremental encoder

(Original Document)

Role

This operation defines the adjustment parameters linked with the .

Preliminary conditions

This operation requires an incremental encoder to have been defined during .

Procedure

The following table describes the operations to be performed:

Step	Action
1	In the browser, double-click on Acquisition. Result:
2	Enter the Axis parameters. The parameters that are displayed depend on the reading format chosen in the configuration: Type 1: number of pulses per cycle (minimum value 256 and maximum value 32767). Type 2: number of pulses per cycle (minimum value 256 and maximum value 32767) and number of cycles (minimum value 1 and maximum value 32767) Type 3: number of pulses per cycle = 32 767. The value that is displayed cannot be modified. It indicates the counting capacity.
3	Enter the axis play value. This value is used to compensate for the position error caused by changing the direction of rotation, if there is mechanical play between the drive and the axis (encoder). If recalibration of the axis is done in the direction of rotation: forward, declare a negative correction value. The correction will be made on reverse movements, reverse, declare a positive correction value. The correction will be made on forward movements. A value of 0 corresponds to no correction. The values are between -(No. of pulses/cycle) /2 and +(No. of pulses/cycle) /2. The correction value cannot exceed 1023 pulses. Note: this correction modifies the switching position of all the cams according to the declared value. Whatever the value of the play entered, the position and captures values sent to the PLC are current values (no corrections).
4	Enter the recalibration value: value of the angle, value of the number of cycles (for type 2 reading format only). The recalibration value is loaded in the position counter on the recalibration command. The values are between 0 and + No. of pulses/cycle

The recipe groups together the data required for the module to control the machine for a series of parts. The recipe can be modified or completely changed by the PLC application. All this information is contained in the PLC %MW words in the memory zone reserved for the module.

Pulse generator with 2 signals offset by 90°. These are produced according to the movement of the axis and are counted by the module.

The configuration gathers together the data which characterizes the machine (invariant) and which is necessary for the TSX CCY 1128 module to operate.

All this information is stored in the PLC %KW constants zone. The PLC application cannot modify them.

These are all the external elements that control the movements of the machine (reducer, encoder…).

This is the number of pulses delivered by the axis per cycle.

Position sensor accepted by the module It can be incremental, SSI absolute or parallel (via Telefast ABE 7CPA11).

This is the module function which is used to adjust the axis in relation to the machine zero or to synchronize the axis in relation to the arrival of a part.

Recalibration forces the position reading to a value which is predefined by the "recalibration value" parameter (included in the pulse field of the cycle).

The module allows recalibration to be carried out systematically for each cycle or for only one cycle. This recalibration is always conditioned to the IREC input.

Logic state which switches to 1 when an angular value in the cycle is overshot and which resets to 0 according to the type of cam.

A cam is systematically associated to one and only one track. Several cams can be associated to one track.

A module function that is used to sample the position value of the axis on detection of a precise event (input Icapt0 and/or Icapt1). The capture has no impact on the values of the axis nor on the cam processor.

The implementation of this function allows the application to manage the process better, for example: in monitoring the number of pulses sent by the encoder, the size of the parts, the axis slip, the angle of arrival of the parts.