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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 101134 - MDx407 SPEEDCTRL_GAIN_1 could not be calculated
Alarm 101134 indicates the drive system cannot automatically calculate the speed controller gain parameter MD1407 SPEEDCTRL_GAIN_1 during commissioning or optimization. This typically occurs when required motor or drive identification data is missing, incorrect, or when the automatic optimization routine lacks sufficient mechanical/electrical system information to derive proper control loop parameters.
101134
Siemens 840D 101134 - MDx407 SPEEDCTRL_GAIN_1 could not be calculated
MDx407 SPEEDCTRL_GAIN_1 could not be calculated
Siemens SINUMERIK operator message 101134: MDx407 SPEEDCTRL_GAIN_1 could not be calculated. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
Alarm 101134 indicates the drive system cannot automatically calculate the speed controller gain parameter MD1407 SPEEDCTRL_GAIN_1 during commissioning or optimization. This typically occurs when required motor or drive identification data is missing, incorrect, or when the automatic optimization routine lacks sufficient mechanical/electrical system information to derive proper control loop parameters.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Verify motor data parameters MD1101-MD1119 are correctly entered from motor nameplate (rated current, voltage, speed, power).
- 2
Check MD1152 (motor moment of inertia) has a valid non-zero value. If unknown, perform motor data identification using commissioning tool.
- 3
Execute motor identification routine via drive commissioning (MD1600=1 for rotating measurement or MD1600=3 for standstill measurement).
Ensure motor shaft can rotate freely and is uncoupled from machine during rotating identification.
- 4
After successful motor identification, reset the alarm and allow system to recalculate MD1407 automatically.
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Always verify with your machine manual or a certified technician before performing service procedures.