Speed Control Type Function Blocks; Warning Concerning Safety - Reer MOSAIC Master M1 Installation And Use Manual


An external error or malfunction deriving from encoder/proximity or its wiring, does
not necessarily involve a change of safety status of the normal output
the function block. Failures or malfunctions of encoder/proximity switch or its wiring
are then recognized by the module, managed and specified via the diagnostic bit on
every function block

To ensure the safety features the diagnostic bit has to be used in the configuration
program created by the user to cause a possible deactivation of the outputs if the
axis is working. In absence of encoder/proximity external anomalies,
equal to 0 (zero).

In presence of encoder/proximity external anomalies, error_out bit will be equal
to 1 (one):
- Absence of encoder or proximity.
- Absence of one or more wiring from encoder/proximity.
- Absence of encoder power supply (only model with TTL external power supply).
- Error of congruence frequencies between signals from encoder/proximity.
- Phase error between signals from the encoder or duty cycle error of a single phase.
Figure 54 – Example of speed control functional block with Error Out enabled
98
MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC
8540780 • 30/03/2016 • Rev.26
of
bit will be