Detailed Description
2.3 Feedrate control
Feeds (V1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-31
Effectivity
Interface signals "Rapid traverse and feedrate override" (DB21, ... DBB6) and "Axis-specific
override active" (DB31, ... DBX1.7) do not apply to the programmable feedrate override. The
programmable feedrate override remains active when these signals are deactivated.
The active override is calculated from the product of the programmable feedrate override
and the feedrate override from the machine control panel.
The default setting is 100%. It is active if no feedrate override has been programmed or
following a RESET, if machine data:
MD22410 F_VALUES_ACTIVE_AFTER_RESET (F function active via RESET)
is not set.
OVR is not active with G33,G34,G35.
2.3.5 Dry run feedrate
Application
The dry run feedrate is used when testing part programs without machining the workpiece in
order to allow the program or program sections to execute with an increased path feedrate,
for example.
"Dry run feedrate selected" DB21, .... DBX24.6
The dry run feedrate can be activated from the PLC or operator panel.
When activated from the operator panel, interface signal "Dry run feedrate selected"
(DB21, ... DBX24.6) is set and transferred by the PLC basic program to interface signal
"Activate dry run feedrate" (DB21, ... DBX0.6).
When selected on the PLC, the "Activate dry run feedrate" interface signal is required to be
set by the PLC user program.
The execution of the program is triggered with G94.
The dry run feedrate also takes precedence over the feedrates for G93,G95 and
G33,G34,G35.
The programmed feedrate is compared with the dry run feedrate in:
SD42100 DRY_RUN_FEED
and then the higher of the two feedrates is applied during travel.
Dry run feedrate change
The dry run feedrate (SD42100 DRY_RUN_FEED) can be changed via the operator panel in
the operating area "Parameters".
No changes can be made once the program has started up.
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