32 HEIDENHAIN Technical Manual iTNC 530 HSCI
• If there is more than one handwheel without display (HR 410 and earlier
versions), this type of handwheel must be activated via the PLC
program (e.g. through evaluation of the permissive buttons). PLC
Module 9036 was expanded accordingly.
• If the PLC program wants to prevent an HR 420 from withdrawing
control from an HR 410, the Marker 4680 (Disable HR 420 activation)
must be set.
• Software version 60642x-03 supports only one HR 550 wireless
handwheel in the system.
The PLC program must ensure that only one of the operating units
(handwheels, machine operating panels) is active at any one time so as to
avoid danger to the operator.
Please note that it may be necessary for the operator to confirm which
operating unit is active before it can actually be used. The risk assessment
of your machine must show whether this is necessary. Such a requirement
could be realized, for example, by pressing the permissive button of the
respective operating unit. Then the operating unit that should be active
according to the PLC program cannot be used for any machine functions
until the permissive button of this operating unit has been pressed.
The emergency stop function of the individual operating stations must
always be active, however!
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