Siemens SINUMERIK 840D Diagnostics Manual page 552

1 Alarms
Reactions:
Remedy:
Program Continuation:
1-552
• Accurate diagnostics via error code MD 1023 $MD_ENC_ABS_DIAGNOSIS_MOTOR
(diagnostics for measuring system absolute track) on motor measuring systems or MD
1033 $MD_ENC_ABS_DIAGNOSIS_DIRECT (diagnostics for direct measuring system
absolute track) for direct measuring systems:
• Overview of bit nos., significance, note:
• Bit 0 Lighting failed
• Bit 1 Signal amplitude too small
• Bit 2 Code connection error
• Bit 3 Overvoltage
• Bit 4 Undervoltage
• Bit 5 Overcurrent
• Bit 6 Battery change necessary
• Bit 7 CRC error (evaluate bit 13) see below, SW 4.2 and higher, synchronous linear
motor
• Bit 8 Encoder cannot be used, Assignment of absolute track to incremental track not
allowed, SW 4.2 and higher, synchronous linear motor
• Bit 9 C/D track for ERN1387 encoder incorrect (see below) or EQN encoder connected
• Bit 10 Log cannot be aborted
• Bit 11 SSI level detected in data cable
• Bit 12 TIMEOUT while reading measured value
• Bit 13 CRC error
• Bit 14 Wrong IPU submodule for direct measuring signal, only with 611D expansion
• Bit 15 Encoder defective
• CRC error bit 7 and bit 13:
• Bit 7: 0, bit 13: 1 CRC error from SIDA-ASIC
• Bit 7: 1, bit 13: 0 Control check byte error
• Bit 7: 1, bit 13: 1 Error on correction of absolute track by incremental track
• Bits 12 and 15: Zero level monitoring SSI
• Bits 14 and 15: Idle level monitoring SSI
• Note on bit 9:
• Incorrect parameterization (e.g. not on EQN MD 1011:
$MD_ACTUAL_VALUE_CONFIG (actual value sensing configuration IM) or MD 1030:
$MD_ACTUAL_VALUE_CONFIG (actual value sensing configuration IM)
• or old hardware (not suitable for EQN)
• or no encoder connected
• or incorrect encoder cable (for ERN instead of EQN)
- Mode group not ready.
- The NC switches to follow-up mode.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
- Channel not ready.
• Check encoders, encoder lines and connectors between drive motor and 611D module.
Check for temporary interruptions (loose contact) caused, for example, by movements in
trailing cable. If necessary, replace the motor cable.
• Incorrect cable type
• Closed-loop control module defective or not suitable for EnDat interface (e.g. closed-
loop control module with EPROM)
Switch control OFF - ON.
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA), 10.04 Edition
10.04