V1: Feedrates
17.4 Feedrate control
Basic Functions
1398 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
17.4.6 Multiple feedrate values in one block
Application
The functionality described in the following is used primarily for grinding, but is not restricted to it.
References:
• Function Manual, Extended Functions; Grinding (W4)
• Function Manual, Expanded Functions; Oscillation (P5)
Functionality
The function "Multiple feedrates in one block" can be used to activate 6 different feedrate values of an NC block,
a dwell time or a retraction motion synchronously, depending on the external digital and/or analog inputs.
Retraction
Retraction by the programmed amount is initiated in the IPO cycle.
Signals
The HW input signals are combined in one input byte for the function "Multiple feedrate in one block". A
permanent functional assignment applies within the byte:
Priorities
The signals are scanned in ascending order starting at I0.
Therefore, the retraction motion (SR) has the highest priority and the feedrate F7 the lowest priority.
SR and ST end the feedrate motions that were activated with F2 - F7.
SR also ends ST, i.e. the complete function.
The highest-priority signal determines the current feedrate.
Machine data:
MD21230 MULTFEED_STORE_MASK
(store input signals for the "Multiple feedrates in one block" function)
can be used to define the response on loss of the highest-priority input in each case (F2 - F7).
Table 17-1 Input byte for "Multiple feedrates in one block"
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Input no.
I7 I6 I5 I4 I3 I2 I1 I0
Feedrate address
F7 F6 F5 F4 F3 F2 ST SR
I7 to I2
Activation of feedrates F7 to F2
I1
Activation of dwell time ST (in seconds)
I0
Activation of retraction motion SR
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