3 safety functions, Safety functions, Integration into the application of the controller – Lenze E94AYAD - SM300 User Manual
Page 23: Safety engineering
Safety engineering
Safety functions
Integration into the application of the controller
1
1.3
1.3.1
1.3-1
EDS94AYAD EN 2.2
1.3
Safety functions
1.3.1
Integration into the application of the controller
For the use of the functions, certain settings in the controller are required.
Here, the Lenze PC software »Engineer« supports and guides you.
When a safety function is required, the safety technology activates the
corresponding safe monitoring function. However, the standstill function is
only directly executed with the ”safe torque off” (STO) function. Other safety
functions in which a controller action is required will need to be safely
monitored.
The actions of the drive (e.g. braking, braking to standstill, keeping the
standstill position) must be implemented in the basic device.
Depending on the design of the basic device, the user applications are
created by means of programming according to IEC 61131 or parameter
setting. For this purpose the system block InterfaceSafetyModule or the
control word SM_dwControl must be implemented into the control
configuration of the controller.
The connection to a user application serves to achieve the following:
1. Activation of the safety function in the safety module, e.g. SS1 the
monitoring starts.
2. The safety module transmits the information to the basic device that
the function has been activated using the corresponding bit in the
control word SM_dwControl.
3. The application must evaluate the control word and start the motion
sequence, e.g. braking etc.
Safety module and basic device communicate via an internal interface.
The request for a safety function is contained within the control word, the
information of which must be processed by the application.
Informatio
n
Offset
Bit
Byte
7
6
5
4
3
2
1
0
SM_
dwControl
4
SDIp
-
-
-
-
-
SS1
STO
5
-
-
-
-
-
-
-
SDIn
6
-
-
-
-
-
-
-
-
7
-
-
-
-
-
-
-
-
SM_
wState
8
-
-
-
EC_S1
EC_S0
-
-
STO
9
-
-
-
-
-
-
-
-
SM_wIo_
State
10
-
AIE
-
-
SD-In4
-
SD-In2 SD-In1
11
-
-
-
-
-
-
-
-
Tab. 1.3-1
Communication telegram from the safety module to the basic device.
Internal communication