Mitsubishi MELSEC-WS series, User Manual

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Chapter 4
45
Connecting devices
4
Connecting devices
This chapter describes the connection of safety sensors and actuators to the
MELSEC-WS safety controller and provides configuration information for the selected
functions.
The MELSEC-WS safety controller supports applications up to Performance Level
(PL) e (in accordance with EN/ISO 13849-1) and up to Safety Integrity Level SILCL3
(in accordance with IEC 62061).
The degree of safety actually attained depends on the external circuitry, the realization
of the wiring, the parameter configuration, the choice of the safety sensors and how
they are mounted on the machine. Take and evaluate these using e.g. a failure
analysis (FMEA).
For further information that has to be taken into consideration during the electrical
installation see Chapter 7.
Loss of the safety function through an incorrect configuration!

Plan and carry out configuration carefully!
The configuration of safety applications must be carried out with the greatest
accuracy and must match the status and the condition of the machine or
system to be monitored.
 Check whether the configured safety application monitors the machine or system as
planned and whether the safety of a configured application is ensured at all times.
This must be ensured in each operating mode and partial application. Document
the result of this check!
 In each case, observe the instructions for commissioning and daily checking in the
manuals of the protective devices integrated into the safety application!
 Note the warnings and function descriptions of protective devices connected to the
MELSEC-WS safety controller! Contact the respective manufacturer of the
protective device if in doubt!
 Take into account that the minimum switch-off time of the connected sensors must
be greater than the execution time of the logic (see the chapter about the logic
editor in the Safety Controller Setting and Monitoring Tool Operating Manual and
the logic editor in the Setting and Monitoring Tool) so that it is ensured that the
MELSEC-WS safety controller can detect the switching of the sensors. The
minimum switch-off time of sensors is usually specified in the technical data of the
sensors.
 If an odd-numbered test output is used, odd-numbered inputs have to be used. If an
even-numbered test output is used, even-numbered inputs have to be used.
 You have to use the test outputs of the module to which the device to be tested is
connected.
ATTENTION
Note