Signal Interconnection
6.7 Application 7
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
6-19
Interconnection of the NCU 7x0 component
● "Infeed Ready" (connection between SLM terminal X21.1 and NCU terminal X122.1)
After activating the infeed, given correct operation, the "Infeed operation" state will be
attained and all axes (BI: p0864) will be enabled. This status must also be forwarded to
the NX components (NX terminal: X122.1).
● "2. OFF3" for all axes (NCU terminal X122.2)
The "2. OFF3" will be forwarded to all axes of the NCU. The input is hard-wired with the
24 VDC.
Interconnection to the NX component
● "2. OFF3" for all axes (NCU terminal X122.2)
The "2. OFF3" will be forwarded to all axes of the NX. The input is hard-wired with the 24
VDC.
Smart Line Module operation
The Smart Line Module without DRIVE-CLiQ interface is not switched on/off using a Drive
Object of the NCU. The control is performed exclusively using terminals on the Smart Line
Module, for example, from a PLC or hardware controller.
Interconnection of the PLC input signals
● "Infeed Ready" (SLM terminal X21.1)
Infeed operational
● "Infeed PreWarning" (SLM terminal X21.2)
Overtemperature prewarning
Interconnection of the PLC output signals
● "Infeed Reset" (SLM terminal X22.3)
Reset of a pending fault
Realization of the safety control
The system/drive-integrated safety function that is an integrated part of the system performs
this task. External safety relays or safety controllers are thus no longer required. The
terminal control of the SH/SBC using NCU/NX functions and Motor Modules is no longer
essential because this function is controlled by the system.
The SINAMICS ("Safe Standstill" and "Safe Brake Control") safety functions satisfy the
requirement for safety integrity level 2 (SIL2) in accordance with IEC 61508. This
corresponds to the control category 3 in accordance with DIN EN 954-1 and DIN VDE 0801.
The "Safe Standstill" function prevents an unwanted starting from standstill of the motor
connected to the drive device.
The need for a line contactor for the safe separation of the energy supply to the motor is no
longer assured.
When servicing work is performed, power must be removed and possibly the main power
switch turned off.
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