Siemens Sinumerik 840C Diagnostics Manual page 212

1 Alarms
1.5.1 Alarm description
300741 Upper limit violated MD
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
Explanation
During ramp-up control detects that machine data has violated input limits. This occurs with parameters with mo-
tor-dependent limits if the motor maximum speed is reduced and maintained after booting. Another cause might be
the switching off of the input limits (P–90, bit 0). Alter parameter and switch on input limits again.
Additional information:
Number of incorrect machine data
S
Remedy
Correct parameter
S
Check all parameters with motor-dependent limits
S
Save BOOT drive
S
Repeat ramp-up
Note
Applies as from SW 3
300742 Lower limit violated MD
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
Explanation
During ramp-up control detects that machine data has violated input limits. This occurs with parameters with mo-
tor-dependent limits if the motor maximum speed is reduced and maintained after booting. Another cause might be
the switching off of the input limits (P–90, bit 0). Alter parameter and switch on input limits again.
Additional information:
Number of incorrect machine data
S
Remedy
Correct parameter
S
Check all parameters with motor-dependent limits
S
Save BOOT drive
S
Repeat ramp-up
Note
Applies for SW 3 only
300742 Converter frequency U/f
Scan
Power On
Effect
Drive only ramps up to ramp-up state 2
Explanation
In V/f mode (selection via MD 1014), only converter frequencies (MD 1100) of 4 kHz and 8 kHz are permissible.
Remedy
Eliminate error during input of converter frequency MD 1100 or by deselecting V/f mode MD 1014.
Note
Applies as from SW 5.1
300743 Error on saving FEPROM
Scan
POWER ON
Effect
Drive only ramps up to ramp-up state 2
Explanation
Error occurred when last saved; data from last save operation are used.
Additional information: none
S
Remedy
Check parameters and save BOOT again
Note
Applies for SW 3 only
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Siemens AG 2001 All rights reserved 6FC5198–jAB40
SINUMERIK 840C / SIMODRIVE 611–D (DA)
08/96 04/96
POWER ON
POWER ON
POWER ON
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