Before you start, familiarize yourself with some basic concepts of the FP-I4C unit.
- Service control interface
All services (FTPC, MQTT, data logger, etc.) use a so-called service control interface to poll the control and status flags/registers of connected devices. This service control interface is configured using the FP‑I4C unit's Web interface.
INTERN refers to the addressable internal memory areas of the FP‑I4C unit which is accessible via Modbus/TCP or the script function. If the unit is used as a stand-alone FTP or SMTP client (no PLC connected), select INTERN as service control interface.
- Port redirections
Via TCP listening ports and port redirections, all interfaces are also available to external clients, such as Control FPWIN Pro7 or SCADA systems. Port redirections can be configured in the Web interface.
- Data logger
The data logger can collect data from all interfaces, allowing you to connect multiple sensors. The log function can be controlled by time trigger or by PLC via the service control interface.
