Siemens F7442 fault code meaning

Series: V90

LR: Multi-turn and modulo range mismatch

servo drive

Meaning: The ratio of the multi-turn resolution to the modulo range (p29246) is not an integer. This delays adjustment because the actual position value cannot be reproduced after power-off/power-on. Set the ratio of the multi-turn resolution to the modulo range to an integer. The ratio v is calculated as follows: Encoders without position tracking (p29243 = 0): For multi-turn encoders: v = (4096 * p29247 * p29248) / (p29249 * p29246). For single-turn encoders: v = (p29247 * p29248)/(p29249 * p29246). Encoders with position tracking (p29243 = 1): v = (p29244 * 29247)/p29246

Possible causes

Source: SINAMICS V90 PROFINET, SIMOTICS S-1FL6 Operating Instructions P372