Parametrizing the confirmation condition associated with a cam

Role

This is used to associate an enable condition with a cam, using an enable bit or via the parts counter.

Enable Bit

A group has 8 control bits which are contained in words ENAB_GROUPi_BITS (where i = group no. 0 to 3) and can be accessed by the PLC program. When an enable bit is associated with a cam, if this bit is at:

1, the cam is enabled,
0, the logic state of the cam remains at 0 whatever the angular position.

Examples of use:

controlling the cams in one group by assigning them the same enable bit.
managing the operating modes

Parts counter

The cam can also be controlled by the state of the parts counter. The cam is only enabled when the parts counter reaches the limit value.

Procedure

The following table describes the operations to be performed:

Step	Action
1	Access the recipe screen for the cam which has to have its parameters entered.
2	Select the enable type in the Enable condition box: Cam continuously enabled: no condition is assigned, and the cam is always enabled. Conditioned by an enable bit: a bit is associated with the cam: choose the bit number (from 0 to 7) in the Enable bit number field. Example: if bit 5 is chosen for a cam in group 0, it is bit ENAB_GROUP0_BITS.5 which enables the cam when it is at 1. When the parts counter is full.

Step

Action

Access the for the cam which has to have its parameters entered.

Select the enable type in the Enable condition box:

Cam continuously enabled: no condition is assigned, and the cam is always enabled.
Conditioned by an enable bit: a bit is associated with the cam: choose the bit number (from 0 to 7) in the Enable bit number field.

Example: if bit 5 is chosen for a cam in group 0, it is bit ENAB_GROUP0_BITS.5 which enables the cam when it is at 1.
When the parts counter is full.

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.