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4. Functioning principles

4.8.2 Types of managed restart

NOTICE: it is the responsibility of the machinery manufacturer to assess if automatic restart prevention can

guarantee the same level of safety as manual restart (as defined in standard EN ISO 13849-1:2015, section

5.2.2).

For each detection field independently, the system manages three types of restart prevention:

Type Conditions for enabling machinery restart

Safety working mode

allowed

Automatic The time interval set through the Inxpect Safety application

(Restart timeout) has passed since the last motion detection*.

All

Manual The Restart signal was received correctly** (see "Restart signal"

on page97).

Always access

detection

Safe manual 1. The time interval set through the Inxpect Safety application

(Restart timeout) has passed since the last motion

detection* and

2. the status of the restart signal indicates that the restart is

now possible (see "Restart signal" on page97).

Both (default) and

Always restart

prevention

Note *: machinery restart is enabled if no motion is detected up to 35 cm (13.8 in) beyond the detection field.

Note **: (for all types of restart) other dangerous system statuses may prevent the restart of the machinery (e.g.

diagnostic fault, sensor masking, etc.)

4.8.3 Precautions for preventing unexpected restarting

To prevent unexpected restarting, if the sensor is installed at a height of less than 30 cm (11.8 in) from the

ground, a minimum distance of 50 cm (20 in) from the sensor must be guaranteed.

Note: if the sensor is installed at a height of less than 30 cm (11.8 in) from the ground, an option is to enable the

masking function to generate a system error if a person stands in front of the sensor.

4.8.4 Configure the restart prevention function

Type Procedure

Automatic 1. In the Inxpect Safety application in Settings > Restart parameters, select

Automatic.

2. In the Inxpect Safety application, in Configuration for each detection field in use with

automatic restart, select the desired Safety working mode and set the Restart

timeout (or the T

OFF

parameter, if present).

Manual 1. In the Inxpect Safety application in Settings > Restart parameters, select Manual.

2. If there is a digital input configured as Restart signal (Settings > Digital Input-

Output), connect the machinery button for the restart signal as convenient, see

"Electrical connections" on page84.

3. To use the Fieldbus communication for the restart signal, make sure that no digital

input is configured as Restart signal (Settings > Digital Input-Output). See the

Fieldbus protocol for details.

4. In the Inxpect Safety application, in Configuration for each detection field in use with

manual restart, set the T

OFF

parameter value.

Note: the Safety working mode is automatically set to Always access detection for all the

detection fields in use with manual restart.

Safe manual 1. In the Inxpect Safety application in Settings > Restart parameters, select Safe

manual.