Method A And B In The Nc-Internal Solution - Siemens SINUMERIK 840C Installation Instructions Manual

10 Axis and Spindle Installation
10.5.3 Positioning mode, M19, M19 through several revolutions
10.5.3.4

Method A and B in the NC-internal solution

With the NC-internal solution there are two methods (method A and method B) by which
the oriented spindle stop can be integrated into the block sequence of the NC program.
Method A (M19 without axis motion):
With method A, the spindle stop is handled in a separate part program block and a block
change is only initiated after the function has terminated. Axis motions are not possible at the
same time as spindle positioning.
Method B (M19 with axis motion):
In method B, M19 is modal even across several blocks. While the spindle is positioning or is
held in the position control, it is possible to move the axes, continue the program or even
perform a tool change (NC MD 520*, bit 5).
The following applies to both methods (A and B):
• M19 S... must be programmed in a separate block without axis motions.
• The orientation is performed in the specified direction of rotation (M03/M04)
• M19 is possible from rest (shortest path)
• The oriented spindle stop is started at the beginning of the block
• M19 is cancelled and terminated by
– Emergency stop (alarm 2000)
– Reset (machine data dependent)
– End of program (M02/M30)(machine data dependent)
– Spindle disable (DB 31 DW
– Servo loop error of spindle or axis
– Error that causes all axes to stop
– Cancellation of NCBB2
– Acknowledge M19 + PLC spindle control (DB 31 DW
• in "MDI AUTO", "jog" or "AUTOMATIC". M19 can also be selected by overstoring.
• M19 is output at the PLC interface as an auxiliary function.
Characteristics peculiar to method A (NC MD 520*, bit 5 = 0)
• Block change is only performed after the M19 function has terminated (acknowledge M19)
• Simultaneous traversing of the axes is not possible.
Characteristics peculiar to method B (NC MD 520*, bit 5 = 1)
• M19 is modal even across several blocks.
• The block change is performed after a delay of one PLC cycle.
• In the following blocks axes can be moved or a tool change performed parallel to
positioning or position control.
• While positioning is running (M19) the direction of rotation must not be reversed
(M03/M04). Otherwise positioning is performed in an undefined direction.
• During M19 it is possible to switch to jog, incremental or repositioning. The position control
loop remains closed and the axes can be traversed.
10–62
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K+3
K+2
© Siemens AG 1992 All Rights Reserved
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6FC5197- AA50
SINUMERIK 840C (IA)
09.95