Safety Integrated - Industry - Siemens

Ex. No.
12
.
Attention
When using a contactor, its design must allow for this.
In this example a contactor K2 was used for testing
without connection to a load circuit.
Determining speed with count module (method 2)
ET 200S contains a standard count module which is connected
with the SBM2 module (from module identification
0x95FF / EEPROM version 1.06) of MASTERDRIVES. The
SBM2module evaluates the signals of the optical sin-/cos encoders.
Operating mode "safe speed" (SG)
The operating mode "safe speed" (SG) can only be activated
following drive standstill.
Attention
Depending on danger analysis and risk level assessment
of the discussed machine, the drive can, in "safe
speed" (SG) mode, also be operated with an open
safety door.
366 Functional Example No. AS-FE-I-012-V10-EN
Further preconditions for the operating mode "safe speed"
(SG):
■ Emergency stop button unlocked
■ Mode switch set to SG
■ DMS (Dead Man Switch) remains continuously pressed.
■ Actual speed value of "safe speed" remains below limit
value N_SG
Signals of the mode switch and DMS are read into an F-DI.
Emergency stop
Emergency stop is read into the F-DI and when pressed
switches off the drive via the OUT3 parameter of the
MASTERDRIVES (fast stop) and option K80 (pulse blocking).
If a readback error occurs at option K80, the contactor (K2) additionally
disconnects the drive from the network.
Safety door monitoring
The safety door is always monitored with a two channel safety
door contact to show that
■ during normal operation and opening of the safety door
the drive is safely switched off,
■ in "safe speed" (SG) mode an opening of the simulated
safety door does not cause the drive to be switched off.
Attention
This example is not a complete solution of a safety
door monitoring. For a respective solution please refer
to Safety Function examples no. 2, 3 and 4.