Signal Interconnection
6.3 Application 3
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
6-7
Interconnection of the PLC input signals
● "Infeed Ready" (SLM terminal X21.1)
The infeed is operating when the "1" signal is on.
Interconnection of the PLC output signals
● "2. OFF3" for all axes (NCU terminal X122.2)
The "2. OFF3" will be forwarded to all axes of the NCU. The additional interconnection to
the individual NX components (NX terminal X122.2) means these axes also receive the
"2. OFF3" signal. The enable does not need to be made from a PLC. A fixed protective
circuit with 24 VDC is also possible.
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).
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.
Line contactor control
The line contactor must be controlled from an external PLC or hardware controller. An
internal line contactor control using a Drive Object by the NCU is not possible.
The following activation/deactivation conditions must be observed for the control (also see
the "Line Contactor Control" chapter):
PLC input signal
● "Line contactor feedback"
Query the switching state of the line contactor
PLC output signal
● "Line contactor control"
Control the line contactor using the input/output condition
Caution
If the named conditions are not observed, the line contactor and the infeed can be
damaged.
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