State-controlled inputs for the second parallel muting sensor pair.
Data type: BOOL
Initial value: FALSE
Connection: Connect these inputs to the muting sensors 3 and 4 connected to the Safety Logic Controller. Constant TRUE or FALSE values are not allowed.
Depending on the result of the risk analysis, optical, mechanical or inductive sensors such as reflection light sensors, mechanical or inductive switches can be used as muting sensors. Optical sensors serve as examples in the help information.
The functional significance of the inputs differs according to the material flow direction:
For a material flow direction from left to right, both of these sensors are positioned behind the safety-related equipment.
In this case, the status at the MutingSwitch21 and MutingSwitch22 inputs can stop the muting operation.
For a material flow direction from right to left, both of these sensors are positioned before the safety-related equipment.
In this case, the status at the MutingSwitch21 and MutingSwitch22 input can start the muting operation and activate muting.
Also refer to the detailed description and the example muting operation procedure shown in the functional description for this function block.
If the function block is activated (input Activate = TRUE), the possible values at these inputs lead to the following function block behavior:
|
Value |
Description |
|---|---|
|
TRUE |
The light beam of the connected muting sensor is interrupted (i.e., there is an object inside the detection area of the sensor).
NOTE:
Once the first input of the sensor pair has switched to TRUE, the second input must follow within the time set at DiscTime21_22. Otherwise this will be recognized as an error (refer also to the DiscTime21_22 description). |
|
FALSE |
The light beam of the connected muting sensor is not interrupted (i.e., there is no object inside the detection area of the sensor). |
Irrespective of whether there is a single-channel or two-channel connection between the muting sensors and the Safety Logic Controller, inputs MutingSwitch21 and MutingSwitch22 are only connected to one signal.
If a two-channel muting sensor is used, either the input channels of the safety-related input device must be parameterized accordingly or the SF_Equivalent or SF_Antivalent function blocks must be connected upstream in order to evaluate or monitor the two-channel signal.