Festo CMMT-ST-C8-1C-S0 Series Operating Instructions Manual page 8

Recommendation:
– Insert a suitable fuse for line protection. The rated current of the fuse must be
less than or equal to the permissible current rating of the selected conductor
cross section.
– The number of devices that can be cross-wired depends on the current con-
sumption of the devices.
7.8 STO installation
Inputs and outputs for the safety sub-function STO
The 2-channel request for the safety sub-function is made via the digital inputs
#STO-A and #STO-B. The digital input #STO-A must not be connected to the digital
input #STO-B. Make sure that no bridges or the like can be used parallel to the
safety sub-function.
The diagnostic contact STA indicates whether the safe state has been reached for
the safety sub-function STO.
[X1A] Pin Type
X1A.2 Digital input
X1A.3
X1A.4 Contact
X1A.5
Tab. 31: Inputs and outputs for the safety sub-function STO
The motor controller cannot detect a cross circuit in the input circuit by itself.
1. Find out if detection of shorts across contacts is needed for the input circuit
and diagnostic contact wiring in the application.
2. If required, use a safety relay unit with detection of shorts across contacts.
Information on using EC and stepper motors
When using stepper motors with a safety classification of SIL 3, cat. 3, Pl e and
EC motors with a safety classification of SIL 2, cat. 3, Pl d, it is not mandatory to
have a safety relay unit or to evaluate the feedback signal STA. The following com-
ponents can be connected to the control inputs #STO-A and #STO-B to request the
safety sub-function STO:
– Safe semiconductor outputs (electronic safety relay units, active safety sen-
sors, e.g. light curtains with OSSD signals; OSSD = "Output Signal Switching
Device")
– Switch contacts (safety relay units with relay outputs, passive safety sensors,
e.g. forced position switches)
When using EC motors that require a safety classification of SIL 3, cat. 3, Pl e, it is
necessary to have a safety relay unit and to evaluate the feedback signal STA via
the diagnostic contact STA. It is not permitted to connect safe sensors directly.
7.9 SS1-t installation
Inputs and outputs for the safety sub-function SS1-t
The safety sub-function SS1-t is wired like the safety sub-function STO but is
supplemented by an emergency stop request (either directly by wiring CTRL-EN
or indirectly via another functional controller) so that the braking ramp can be
activated by the safety relay unit.
7.10 Installation for operation without safety function
For operation without the safety subfunction, wire inputs X1A.2 to X1A.5 as
follows:
[X1A] Pin Type
X1A.2 Digital input
X1A.3
X1A.4 Contact
X1A.5
Tab. 32: Circuitry of inputs and outputs without safety sub-function
8 Commissioning
8.1 Safety
WARNING
Severe, irreversible injuries from accidental movements of the connected
actuator technology.
Unintentional movements of the connected actuator technology can result from
exchanging the connecting cables of a servo drive or between servo drives.
• Before commissioning: All cables must be correctly assigned and connected.
NOTICE
During commissioning: Keep the range of movement of the connected actuators
clear, so that no persons are endangered.
NOTICE
Unauthorised Access to the Device Can Cause Damage or Malfunction.
• When connecting the device to a network, protect the network from unauthor-
ised access.
Standards for security in information technology can be used for network
protection measures, e.g. IEC 62443, ISO/IEC 27001.
Identifier Function
#STO-A Safe torque off,
channel A
#STO-B Safe torque off,
channel B
STA-C1 Safe torque off
acknowledge, diag-
STA-C2
nostic contact
Identifier Function
#STO-A Supplies each one with 24 V
#STO-B
STA-C1 Do not connect
STA-C2
Use of safety functions
NOTICE
The safety sub-function STO is already available on the servo drive on delivery
without the need for any additional parameterisation. Prior to initial commis-
sioning, wire the safety sub-function STO as a minimum.
1. Make sure that each safety function of the system is analysed and validated.
It is the responsibility of the operator to determine and verify the required
safety classification (safety integrity level, performance level and category) of
the system.
2. Put the servo drive into operation and validate its behaviour in a test run.
During integration of the PDS, observe the measures stipulated by standard
EN ISO 13849-1, Chapter G.4:
– Functional test
– Project management
– Documentation
– Performance of a black-box test
8.2 Preparation for commissioning
For initial commissioning, you will need to have the Festo Automation Suite
software installed along with the CMMT-ST plug-in è www.festo.com/spè .
Prepare for commissioning as follows:
1. Check wiring of the CMMT-ST.
2. Install Festo Automation Suite plus CMMT-ST plug-in on the PC.
3. Create project and add CMMT-ST device.
4. Establish connection to the CMMT-ST and set network configuration.
5. Identify the technical data of the components that is required for configura-
tion.
8.3 Commissioning steps
NOTICE
Unwanted drive movements or damage to components.
Incorrect parameterisation may result in unwanted drive movements or overload
when the closed-loop controller is enabled or may lead to connected components
becoming overloaded or damaged.
• Do not enable the closed-loop controller until the configured components
(servo drive, motor, axis, etc.) match those that are connected exactly.
During initial commissioning with the Festo Automation Suite with the CMMT-ST
plug-in installed, the following steps must be performed, for example:
1. Perform configuration and parameterisation with the CMMT-ST plug-in (hard-
ware configuration, critical limits and parameters).
2. If the safety function is being used, check functioning of the safety function
è Manual Safety sub-function STO.
3. Check signal behaviour of the digital inputs/outputs (e.g. limit/reference
switch).
4. Provide required control signals.
5. Check direction of rotation/direction of travel of the electromechanical drive
(e.g. in jog operation).
6. Carry out homing.
7. Test positioning behaviour (test mode, è help for the CMMT-ST plug-in).
8. If necessary, optimise controller setting (optional, è help for the CMMT-ST
plug-in).
9. Perform fieldbus configuration and test control profile (è description of the
device profile used).
10. Complete commissioning (e.g. save project with Festo Automation Suite and
archive project).
9 Operation
Check the safety functions at adequate intervals for proper functioning. 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 interac-
tion with all components. Time period for cyclical test (PTI) è 14.1 Technical data,
safety engineering.
After the safety sub-function STO has been requested and the request completed,
the functional controller enable must be reactivated.
Have qualified personnel regularly check and document the function of the diag-
nostic contact. The machine manufacturer must specify the exact interval, based
on their application.
The CMMT-ST is maintenance-free during its period of use and specified service
life.
The machine manufacturer must ensure the device is protected against restart
according to the EN ISO 14118 standard "Safety of machinery – Prevention of
unexpected start-up".
With suspended axes, additional measures must be put in place to protect against
falling loads. The device does not feature a safety sub-function SBC (Safe brake
control).
Measures must be put in place to protect against loads that are coasting down.
We recommend decelerating the drive to a standstill before applying a brake. See
information on implementing the safety function SS1-t.
10 Maintenance and care
If used as intended, the product is maintenance-free.