Pilz PNOZ ms4p speedcontrol - Manual (Page 11)

Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: [email protected]
3-1
3.1 Intended use
3 Safety
3 3000 Safety Safety 3- 3.1 Intended use 3100 Intended use 3-
The expansion module monitors standstill, speed and direction of rota-
tion in accordance with EN ISO 13849-1 up to PL e and EN IEC 62061
up to SIL CL 3.
The expansion module may only be connected to a base unit from the
PNOZmulti modular safety system.
The PNOZmulti modular safety system is used for the safety-related in-
terruption of safety circuits and is designed for use on:
` Emergency stop equipment
` Safety circuits in accordance with VDE 0113 Part 1 and EN 60204-1
WARNING!
Users must take appropriate measures to detect or exclude
errors (e.g. slippage or broken shearpin) which cause the fre-
quency of the encoder signal to no longer be proportional to the
monitored speed.
Appropriate measures are:
` Using the monitored encoder to also control the drive
` Mechanical solutions
WARNING!
Encoder errors are detected and signalled via a diagnostic bit.
This does does notbring the relevant axis to a safe condition.
To maintain safety (Category 3), the diagnostic bit (diagnostic bit
10) in the user program must be evaluated in such a way that a
shutdown occurs if the axis is in operation (see examples in
Chapter 9).
CAUTION!
If there are frequency differences between tracks A and B of the
incremental encoder, the track with the higher frequency will be
evaluated. Different directions of rotation will no longer be
detected. The outputs Clockwise and Anti-clockwise switch
to a safe condition. The safe condition is cleared again as soon
as the error is remedied. Hazards that can arise through an auto-
matic restart must be excluded within the user program.