The ratio between multi-turn resolution and modulo range is not an integer, causing position adjustment to reset. The manual's first action is: “Make the ratio between the multi-turn resolution and the modulo range an integer number. The ratio v is calculated as follows: • Motor encoder without position tracking (p29243 = 0); - For multi-turn encoders: v = (4096 * p29247 * p29248)/(p29249 * p29246) - For single-turn encoders: v = (p29247 * p29248)/(p29249 * p29246) • Motor encoder with position tracking (p29243 = 1); v = (p29244 * p29247)/p29246”
- Model
- Siemens SINAMICS V90, SIMOTICS S-1FL6
- Display shows
- LR: multi-turn does not match the modulo range (F7442)
- Type
- Fault code
- Source
- Manual p. 292
What F7442 means
LR: multi-turn does not match the modulo range p. 292
Common causes
- The ratio between the multi-turn resolution and the modulo range (p29246) is not an integer number. This results in the adjustment being set back, as the position actual value cannot be reproduced after power-off/power-on. p. 292
What to do
- Make the ratio between the multi-turn resolution and the modulo range an integer number. The ratio v is calculated as follows: • Motor encoder without position tracking (p29243 = 0); - For multi-turn encoders: v = (4096 * p29247 * p29248)/(p29249 * p29246) - For single-turn encoders: v = (p29247 * p29248)/(p29249 * p29246) • Motor encoder with position tracking (p29243 = 1); v = (p29244 * p29247)/p29246 p. 292
Before you service the product, read the safety instructions in the manual p. 2.
If F7442 is still not resolved
- Contact service / dealer for assistance p. 2 “Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions.”
- Contact service / dealer for assistance p. 13 “NOTICE Property damage due to loose power connections Insufficient tightening torques or vibration can result in loose power connections. This can result in damage due to fire, device defects or malfunctions.”
This page summarises what the manufacturer’s manual says about F7442; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.