Siemens SINUMERIK 840D sl Series Diagnostics Manual page 42

Overview of Alarms
Remedy: Please inform the authorized personnel/service department. 3 MD identifiers are output,
depending on the type of error.
1. $MA_INDEX_AX_ASSIGN_TAB (axis-specific MD 30500: The error is due to multiple
assignment of a position table (NCK MD 10910/10930 INDEX_AX_POS_TAB_n) to axes
with different types (linear/rotary axis).
2. $MN_INDEX_AX_POS_TAB_n (NCK MD 10910/10930): The contents of the displayed
table n contain an error.
• The entered positions must be arranged in increasing size.
• A particular position must not be set more than once.
• If the table is assigned to one or several modulo axes, then the contents must be within
the 0 to < 360 degree range.
3. $MN_INDEX_AX_LENGTH_POS_TAB_n (NCK MD 10900/10920): The length of the
displayed position table n was specified with 0.
Program Con- Clear alarm with the RESET key. Restart part program
tinuation:
4090
Too many errors during power-up
Definitions: More than <n> errors occurred during control power-up.
Reactions: - NC Start disable in this channel.
- Alarm display.
Remedy: Set the machine data correctly.
Program Con- Switch control OFF - ON.
tinuation:
4100
System cycle time/scan time divider corrected for digital drive
Definitions: The machine data 10050 SYSCLOCK_CYCLE_TIME (system clock cycle time) and/or
MD 10080 SYSCLOCK_SAMPL_TIME_RATIO (dividing factor of the position control
cycle for actual value acquisition) have been corrected. If this requirement cannot be sat-
isfied with the entered values (e.g. because the system clock cycle time is not a multiple
of 31.25 ms), then the system clock cycle time is automatically expanded until the drive
clock cycle time lies within the 31.25 ms grid.
The modifications were so made that, due to the selection of the system clock cycle time
in MD 10050 SYSCLOCK_CYCLE_TIME, the programmable hardware divider 1 was
readjusted in such a way that the selected time and the basic drive cycle result in a 31.25
ms grid. If this requirement is unfeasible (e.g. because the system clock cycle is not a
multiple of 31.25 ms), the system clock cycle is automatically increased until the basic
drive cycle is in a 31.25 ms grid.
The new value of the SYSCLOCK_CYCLE_TIME can be obtained from the MD 10050.
The position control cycle can be set with the following gradations:
• up to 4 ms: 125 µs step
• up to 8 ms: 250 µs step
• up to 16 ms: 0.5 ms step
• up to 32 ms: 1 ms step
Reactions: - Alarm display.
Remedy: No remedial measures are required. The alarm display can be canceled with Reset.
Program Con- Clear alarm with the Delete key or NC START.
tinuation:
4101
Position control cycle for digital drive reduced to %1 ms
Parameters: %1 = String (time in ms)
Definitions: The position control clock divisor in the NCK MD 10060
POSCTRL_SYSCLOCK_TIME_RATIO was set such that a position control cycle time of
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005