Study to Determine the Onset of Action of Indacaterol in Patients With Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD)

Inclusion Criteria: * Male and female adults aged ≥40 years, who have signed an Informed Consent Form prior to initiation of any study-related procedure * Patients with a diagnosis of Chronic Obstructive Pulmonary Disease (COPD) (moderate-to-severe as classified by the GOLD Guidelines, 2006) and: * Smoking history of at least 20 pack years * Post-bronchodilator Forced Expiratory Volume in 1 Second (FEV1) \<80% and ≥30% of the predicted normal value. * Post-bronchodilator FEV1/Forced Vital Capacity (FVC) \< 70%, where FVC is forced vital capacity ('Post-' refers to 15-30 minutes after inhalation of 400 μg of salbutamol at Visit 2) Exclusion Criteria: * Pregnant / nursing women or women of child-bearing potential * Long term oxygen therapy (more than 15 hours per day) on a daily basis for chronic hypoxemia * Patients hospitalized for COPD exacerbation in 6 weeks prior to Visit 2 and up to Visit 3 * Respiratory tract infection within 6 weeks prior to Visit 2 and up to Visit 3 * Concomitant pulmonary disease, pulmonary tuberculosis (unless chest x-ray confirms no longer active) or clinically significant bronchiectasis * Any history of asthma, including: blood eosinophil count \>400/mm3; onset of asthma symptoms prior to age 40 years * History of long QT syndrome or whose QTc (Bazett's) measured at Visit 2 or Visit 3 is prolonged (\>450ms for males or \>470ms for females) * Clinically relevant lab abnormalities / conditions such as (but not limited to) unstable ischemic heart disease, arrhythmia (excluding stable AF), uncontrolled hypertension, uncontrolled hypo- and hyperthyroidism, hypokalemia, hyperadrenergic state or any condition which in the investigator's opinion might compromise patient safety or compliance, interfere with evaluation, or preclude completion of the study * Uncontrolled Type I / Type II Diabetes or blood glucose outside normal or HbA1c \>8.0% of total hemoglobin measured at Visit 2 * Any patient with lung cancer or any active cancer or a history of cancer with less than 5 years disease-free survival time * History of hypersensitivity to any of the study drugs * Irregular day/night, waking/sleeping cycles e.g. shift workers * Live attenuated vaccinations within 30 days prior to Visit 2 * Investigational drug within 30 days prior to Visit 2 * Known history of non-compliance or not able to use devices or perform spirometry Other protocol-defined inclusion/exclusion criteria may apply