JAN-FEB 2019

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INTECH JANUARY/FEBRUARY 2019 19 FACTORY AUTOMATION FAST FORWARD l Many HMIs can be remotely accessed via a web browser or an app running on a smartphone or tablet. l Remote access to a PLC is often one- way only, from the PLC to remote devices, to prevent tampering with real-time control. l Remote access via VPNs has a very high degree of security, and hosted VPN solutions simplify setup, use, and maintenance. There are several ways to remotely monitor PLCs and HMIs, but VPN connections are most secure Figure 1. HMI remote access: This C-more HMI touch panel provides remote access functionality, as well as local control and monitoring.

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