Operation of the electronic Cam Module

(Original Document)

Introduction

The module calculates the position’s reading from an absolute or connected to its inputs. The module controls its outputs depending on this position and on the transferred ().

Illustration

The following diagram illustrates the operation of the cam module.

Description

Position: the module calculates the position’s reading (angular and number of turns) according to the parameters provided by the position .

: defines when the switch from 1 to 0 according to the and acceptance parameters transmitted by the PLC processor.

: control the outputs of the module according to the status of the cams associated with them.

PLC interface: this enables:

the transfer of the configuration and acceptance parameters to the module,
hardware faults to be recognized
in the sequential program: the management of the machine operating modes and the extension of the module functions by acting directly on the outputs.

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

This is all the internal data that defines the activation of the outputs according to the position reading of the axis. The cam program represents the most important part of the recipe.

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.

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

This is the part of the module that directly controls the outputs according to the angle reading and according to the cam program supplied with 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.

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.

This is the logic state which can be applied to the physical output. The maximum number of tracks is 32.