Operation And Use; Obligations Of The Operator; Maintenance And Care; Protective Functions - Festo CMMP-AS M0 Series Manual

Operation and use

6 Operation and use
6.1

Obligations of the operator

The functionality of the safety device must be tested at appropriate intervals. It is the responsibility
of the operator to choose the type and frequency of the checks within the specified time period.
The manner in which the test is conducted must make it possible to verify that the safety device is
functioning perfectly in interaction with all components.
6.2

Maintenance and care

The motor controller CMMP-AS-...-M0 with integrated safety function is maintenance-free.
6.3

Protective functions

6.3.1

Voltage monitoring

The input voltages at STO-A and STO-B are monitored. If the input voltage at STO-A or STO-B is too
low or too high, the driver supply for the power semiconductors of the motor controller is switched off
safely. This switches off the power output stage (PWM).
6.3.2

Overvoltage and reverse polarity protection

The STO-A and STO-B control inputs are protected against overvoltage and reverse polarity of the
control voltage è 8.1.3 Electrical data [X40], è Tab. 19 Technical data: electrical data of the STO-A and
STO-B inputs.
The 24 V DC supply voltage of the motor controller connected to [X40] is short-circuit proof.
6.4

Diagnostics and fault clearance

6.4.1

Status display

Display on the motor controller
Display Description
"H": the motor controller is in the "safe status".
This does not have the same meaning as the information on the status of the STO
safety function (Safe Torque Off ).
There is no special display for the "unsafe status"; the normal status indicators of
the motor controller are displayed.
Tab. 13: 7-segment display on the motor controller
6.4.2

Error messages

When an error occurs, the motor controller shows an error message cyclically in the 7-segment display
on the front of the motor controller. The error message consists of an "E" (for Error), a main index (xx)
and a subindex (y), e.g.: E 5 1 0.
Warnings have the same number as an error message. The difference is that a warning is displayed
with a prefixed and suffixed hyphen, e.g. - 1 7 0 -.
The error messages relevant for the functional safety in connection with the STO safety function are
listed in the following tables.
Festo — CMMP-AS-...-M0 — 2022-07c 31