Echelle Spectrograph for Rocky Exoplanets and Stable Spectroscopic Observations (ESPRESSO) is the latest instrument installed at the European Southern Observatory (ESO)-Very Large Telescope (VLT) site in Chile. To fulfill its scientific requirements, ESPRESSO can operate both in 1-UT mode (using any of the four VLT unit telescopes) and in 4-UT mode. In 4-UT mode, the light of the four 8-m telescopes is combined in an incoherent focus to form a 16-m equivalent telescope, thus providing the largest collecting area ever at optical-NIR wavelengths. In ESPRESSO, dedicated front end units (FEUs) allow collection of the light coming from the telescope tunnels conveying it through fibers to the spectrograph. All the functionalities of the FEUs are managed by the instrument control electronics (ICE) and software. We aim to provide the detailed description of the realization of this ICE, based on Beckhoff programmable logic controllers. In particular, we show ESPRESSO ICE functions distribution, the motion control characteristics, and the main validation tests performed during the European and Chilean integration phase, which led to technical acceptance of ESPRESSO by ESO before its first light achieved at the end of 2017.

中文翻译：

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ESO-VLT ESPRESSO仪表控制电子设备的实现

用于岩石系外行星和稳定光谱观测的埃歇尔光谱仪（ESPRESSO）是安装在智利欧洲南部天文台（ESO）-超大型望远镜（VLT）站点的最新仪器。为了满足其科学要求，ESPRESSO可以在1-UT模式（使用四个VLT单位望远镜中的任何一个）和4-UT模式下运行。在4-UT模式下，四个8米望远镜的光在一个非相干焦点中组合在一起，形成一个16米等效望远镜，因此在光学近红外波长下提供了有史以来最大的收集面积。在ESPRESSO中，专用的前端单元（FEU）可以收集来自望远镜隧道的光，并将其通过光纤传输到光谱仪。FEU的所有功能都由仪器控制电子设备（ICE）和软件进行管理。我们旨在提供基于Beckhoff可编程逻辑控制器的ICE实现的详细描述。特别是，我们展示了ESPRESSO ICE的功能分布，运动控制特性以及在欧洲和智利整合阶段进行的主要验证测试，这导致ESO在ESPRESSO于2017年底首次亮相之前就获得了技术认可。