Pilz PNOZ m EF 2MM - Manual (Page 10)

Function description
Operating Manual PNOZ m EF 2MM
1003107­EN­01 10
4 Function description
4.1 Operation
The motion monitoring module PNOZ m EF 2MM can monitor two axes independently. The
motion monitoring module signals the status of the monitored values to the base unit.
Depending on the implemented safety circuit, the values may be transferred from the base
unit to an output on the control system. Proximity switches are used to record the values.
The configuration of the motion monitoring module is described in detail in the PNOZmulti
Configurator's online help.
The relay conforms to the following safety criteria:
} The circuit is redundant with built­in self­monitoring.
} The safety function remains effective in the case of a component failure.
4.2 Block diagram
X3
A22 B22 S22 GND
X4
A12 B12 S12 GND
X12 X22
Mini-IO Mini-IO
4.3 Monitoring functions
Safe speed monitoring
The "Safe speed monitoring" function (SSM) monitors whether the current speed exceeds a
limit value.
If the configured limit value is exceeded, the output switches off. As soon as the value falls
below the limit value (plus hysteresis), the output switches off again.
8 limit values can be configured per axis in the PNOZmulti Configurator.
A tolerance range may also be set for the limit values used to monitor the speed. This toler­
ance range modifies the set limit values. As a result, one­off or periodic overshoots that ex­
ceed the limit values can be tolerated.
The following values can be configured for the tolerance range: