Overview of Alarms 08/2005
2-902
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: The configuration of the motor measuring system for an SSI encoder is incorrect:
MD_1022 $MD_ENC_ABS_RESOL_MOTOR must not be 0.
Reactions: - Mode group not ready.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
Remedy: • Set MD_1022 $MD_ENC_ABS_RESOL_MOTOR to the correct value:
• Rotary encoder: Singleturn resolution (increments per revolution).
• Linear encoder: Resolution of an increment (in nanometers).
Program Con-
tinuation:
Switch control OFF - ON.
301711 Axis %1 drive %2 transmission length SSI motor measuring system invalid
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: The configuration of the motor measuring system for an SSI encoder is incorrect:
MD_1028 $MD_NO_TRANSMISSION_BITS (SSI transmission length) is less than the
number of all parameterized bits in MD_1021 $MD_ENC_ABS_TURNS_MOTOR (multi-
turn), MD_1022 $MD_ENC_ABS_RESOL_MOTOR (singleturn) and MD_1027
$MD_ENC_CONFIG bit 14 (alarm bit) and MD_1027 $MD_ENC_CONFIG bit 12 (parity
bit).
Reactions: - Mode group not ready.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
Remedy: • Set parameters correctly for all associated machine data:
• MD_1028 $MD_NO_TRANSMISSION_BITS (SSI transmission length): number of bits
in an SSI protocol, including all bits, such as alarm bit/parity bit
• MD_1021 $MD_ENC_ABS_TURNS_MOTOR (multiturn): number of resolvable revolu-
tions
• MD_1022 $MD_ENC_ABS_RESOL_MOTOR (singleturn): number of increments per
revolution.
• MD_1027.Bit 12 $MD_ENC_CONFIG.Bit 12: parity bit
• MD_1027.Bit 14 $MD_ENC_CONFIG.Bit 14: alarm bit
• Example:
• SSI encoder with 25 bits transmission length, 12 bits multiturn, 12 bits singleturn, one
alarm bit:
• $MD_NO_TRANSMISSION_BITS = 25
• $MD_ENC_ABS_TURNS_MOTOR = 4096
• $MD_ENC_ABS_RESOL_MOTOR = 4096
• $MD_ENC_CONFIG.Bit 14 = 1
• $MD_ENC_CONFIG.Bit 12 = 0
Program Con-
tinuation:
Switch control OFF - ON.
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