Siemens 300736 fault code meaning
Siemens / 300736
Series: SIMODRIVE 611D
Lh characteristic invalid
servo drive
Meaning: The value in MD 1143: $MD_LH_CURVE_UPPER_SPEED (LH curve upper speed) is less than or equal to the value in MD 1142: $MD_FIELD_WEAKENING_SPEED (threshold speed for field weakening) or the value in MD 1144: $MD_LH_CURVE_GAIN (LH curve gain) is less than 100.
Possible causes
Source: SINUMERIK 840D/840Di/810D Diagnostics Manual 11/2006 (EN, Siemens official site) 2.3 SIMODRIVE ALARMS