Electrical installation: input / output 63
Using a digital input as a drive enable input (optional)
A general purpose digital input can be configured as a ‘drive enable input’. This input
must be activated to allow the drive to operate. This provides an additional method for
stopping the drive using a hardware switch or external PLC/controller (e.g.
NextMove e100), although it does not provide any of the formal safety features of the
Safe Torque Off inputs (page 64). The optional drive enable input is configured using
the Digital I/O tool in Mint WorkBench.
Using a digital input as a home switch input (optional)
If homing is being handled locally by the MicroFlex e150, the axis home switch (if
present) must be wired directly to the home input on the MicroFlex e150, otherwise it
will not be able to complete its internal homing routines. The home switch input is
configured using the Digital I/O tool in Mint WorkBench, or by using the Mint
HOMEINPUT keyword. Other HOME… keywords define the homing sequence.
If homing is being handled by an EtherCAT master over Ethernet, and the master is
profiling the motion, there are two options. The choice depends on the accuracy
required for the homing and the EtherCAT cycle-time:
• The axis home switch can be wired to an input on the MicroFlex e150, and then
mapped back to the master over EtherCAT;
• The home switch can be wired directly to the EtherCAT master.
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