SIEMENS 3GL  is an advanced HMI development framework for SINUMERIK controllers, enabling developers to build fully featured, professional-grade custom operator systems using structured programming languages. FMI uses SIEMENS 3GL to develop complete branded HMI systems for customers' machine tools — from brand identity on the home page to machining parameters, measurement, and diagnostics — all running natively within the SINUMERIK controller without any external devices.

Case Study: FMI has developed a complete 3GL HMI system (Dawn3GL HMI) for DAWN MACHINERY Co., Ltd.'s cylindrical grinding machine series, covering multiple machine models including vertical cylindrical grinders, profile grinding machines, and multi-station combined machine tools.

System Screen Functions

▸ Home / Brand Page

Custom branded home page integrating company logo, product series menu, and QR code — combining brand identity with operational navigation.

▸ Process Home

Real-time display of X/Z/C three-axis machine coordinates, absolute coordinates, and distance-to-go; simultaneous monitoring of work spindle and wheel spindle current and speed; standby position settings.

▸ Grind Setting (O.D. / Face)

Complete grinding parameter setup: grinding mode selection (OD, face, etc.), target diameter, safety diameter, infeed amount, left/right position, rough/fine speed, and dwell time.

▸ Grind Condition / Wheel Condition

Detailed grinding process conditions and grinding wheel specification management.

▸ Work Setting (G54 Coordinate System)

G54 workpiece coordinate system setup with multiple coordinate group switching and graphical position confirmation.

▸ Dress Setting / Manual Dress

Dressing coordinate setup, Current Count and Dress Count management, with separate settings for OD and face dressing plus custom dressing modes.

▸ Dress Parameters

Detailed dressing feed rate and path parameter configuration.

▸ Process List

Machining process management with program selection and full-reset functions.

▸ Offset List

Tool/wheel offset value management including full-retract amount settings.

▸ Measure Setting (O.D. / L.Side)

OD measurement and left-face measurement process configuration for different probe configurations.

▸ Save / Load

Machining program read, write, and delete management interface.

▸ Current Protection

Work spindle and wheel spindle overload current protection threshold settings to prevent spindle damage.

▸ Current / Speed Monitor

Real-time spindle current and speed numerical display.

▸ Diagnosis

3GL system version information (version number, build date) and individual feature enable status parameters for maintenance and debugging.

Technical Highlights

• SIEMENS 3GL structured language development, runs natively on SINUMERIK controller
• Full brand customization: logo, color scheme, and menu structure designed to customer specifications
• Complete workflow coverage: machining, dressing, measurement, offset, and diagnostics
• Multi-axis (X/Z/C) real-time coordinate display for at-a-glance machine status
• Multiple G54 workpiece coordinate group switching support
• Complete program storage management and diagnostic functions
• Applicable to cylindrical grinders, profile grinders, and various grinding machine types