SIPOS SEVEN 2SA7 - Torque Curve; General Information

Operation instructions
SIPOS SEVEN: PROFITRON, HiMod
Page 98 Y070.302/EN
10 Torque curve
10
Torque curve
10 Torque curve
This chapter does not apply to 2SG7 and 2SQ7.
Preventive valve monitoring is possible by comparing up to three torque curves recorded at differ-
ent times which the actuator is in operation.
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Prerequisite for the recording of the torque curves is a valid end position setting.
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Realistic comparison of the recorded torque curves is only possible for identical actuator set-
tings during recording.
10�1 General information
The recording of the torque curves can be performed:
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Directly at the actuator via
– display using the Drive Controller. This method is described in the following,
– The COM-SIPOS PC parameterization software (actuator must be in LOCAL mode);
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From the DCS via PROFIBUS DP-V1 (actuator must be in REMOTE mode, ‘Ready‘).
The travel is scanned in 1 % steps. Each curve can be overwritten.
There are different methods to determine the torques recorded in a torque curve.
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Calculation using the DC link converter current
The torque values may differ from the actual torque, especially in the end positions and for speed
variations during operation.
Thisversionisautomaticallyusedifnotorquemeasurementangeisprogrammed.
Or
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Measurementwittorquemeasurementange
Prerequisiteisthatatorquemeasurementangeisavailableandthe‘Torquemeasurement
ange’parameterissettoanaloginputAI1/AI2.
Ifthisparameterisset,thevalueofthetorquemeasurementangeisautomaticallyusedforthe
torque curve.
For actuators with linear thrust units and part-turn gearboxes, the displayed curve is proportional to
the actual force curve of the linear actuator or the torque curve of the part-turn actuator.
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When recording the torque curves, the actuator operates the valve at least twice across the
complete travel.
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The procedure can be aborted at any time: Press Drive Controller.
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Faults during recording (blockage of the travel, cancelation by the operator, failure of the power
supply etc.) are shown in the display. Acknowledge signal.
The actuator changes to the "Record torque curve“ initial state. The aborted recording or curve
is not saved.
The recorded torque curves can be viewed via the COM-SIPOS parameterization program or PRO-
FIBUS DP (e.g. SIMATIC PDM, DTM).