Matching Response Time and Refresh Rate to the Control Cycle
Definitions of response time and refresh rate, how to match them to the control cycle, and the refresh behaviour of fieldbus types.
Germanjet news, technical articles and resources

Definitions of response time and refresh rate, how to match them to the control cycle, and the refresh behaviour of fieldbus types.

From node address, PDO/SDO and baud rate to multi-magnet reading — the practical essentials of connecting magnetostrictive displacement sensors to CANopen / EtherCAT, plus on-site pitfalls to avoid.

Magnetostrictive sensors heat themselves after power-up and reach thermal equilibrium in about 30 minutes; this explains the real magnitude of warm-up drift and steady-state temperature effects, and when temperature compensation is genuinely needed.

Where the measuring dead zone comes from, figures for Series 16 / 17 / 19F, and how to keep clear of dead zones when mounting. Do not estimate about 30 mm at each end.

The difference between absolute and incremental position, why magnetostrictive absolute output needs no re-homing after power loss, and what that means in practice.

Clarifies the difference between resolution, repeatability and non-linearity in magnetostrictive displacement sensors and what each means for selection, with on-site pitfalls.

From magnet coaxiality and zero-point calibration to signal cable shielding and grounding — the key steps in installing and commissioning magnetostrictive displacement sensors, plus what to watch when mounting inside hydraulic cylinders.

Organised by symptom, cause and remedy — on-site troubleshooting for no output, fluctuating values, measurement deviation and fieldbus data loss in magnetostrictive displacement sensors.

Starting from the high-temperature, high-pressure, oil-contaminated, long-stroke conditions of hydraulic cylinders, this explains how to choose between cylinder-integrated and external magnetostrictive types and why they run maintenance-free.

An objective comparison of magnetostrictive, LVDT and potentiometer displacement technologies across accuracy, service life, stroke, environment and cost, with selection recommendations.

Explains how magnetostrictive displacement sensors measure position, distinguishes the magnetostrictive effect from the Wiedemann effect, and shows why torsion-wave timing and non-contact operation give such long service life.

Compares analog (4-20 mA / 0-10 V) and fieldbus (CANopen / Profibus / EtherCAT / Profinet) outputs for magnetostrictive displacement sensors — pros and cons, suitable applications and protection considerations.