Siemens SINUMERIK 840D sl Series Diagnostics Manual page 369

08/2005
%3 = Block number
Definitions: When DECODING SINGLE BLOCK has been selected and there is a chain of thread
blocks, then machining pauses occur at the block limits until the next block is executed
with the new NC Start.
In normal single block mode, the program is stopped by a higher-level logic only at the
block boundaries at which no contour distortions or contour errors can occur. With
chained thread blocks, this is the last thread block!
Reactions: - Alarm display.
Remedy: If only one thread block has been programmed, the alarm message can be ignored.
If there are several consecutive thread blocks, this machining section must not be exe-
cuted in the automatic DECODING SINGLE BLOCK mode.
Program Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
22270
Channel %1 block %2 maximum velocity of thread axis at position %3 reached
Parameters: %1 = Channel number
%2 = Block number, label
%3 = Position
Definitions: The axis velocity is too high for thread cutting. The maximum feedrate was reached at the
axis position indicated. The velocity of the thread axis depends on:
• The programmed thread pitch
• The programmed thread lead change (G34)
• The thread length (G34)
• The defined spindle speed (part program, FC18, synchronized action)
• The spindle override (path and individual axis overrides are ineffective)
Reactions: - Alarm display.
Remedy: Reduce the velocity for at least one of the above factors.
Program Con- Clear alarm with the Delete key or NC START.
tinuation:
22275
Channel %1 block %2 zero velocity of thread axis at position %3 reached
Parameters: %1 = Channel number
%2 = Block number, label
%3 = Position
Definitions: An axis standstill was reached at the specified position during thread cutting with G35 due
to the linear decrease in the thread lead. The standstill position of the thread axis
depends on:
• Programmed thread lead decrease
• Thread length
Reactions: - Alarm display.
Remedy: Change at least one of the above factors.
Program Con- Clear alarm with the Delete key or NC START.
tinuation:
22280
Channel %1 in block %2: Prog. acceleration path too short %3, %4 required
Parameters: %1 = Channel number
%2 = Block number, label
%3 = Prog. acceleration path
%4 = Required acceleration path
Definitions: In order to stay within the programmed acceleration path, the acceleration caused an
overload on the thread axis. In order to accelerate the axis with the programmed dynamic
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Overview of Alarms
2-369