SimScaleSics - Industrial Scale & MT-SICS Terminal Emulator

SimScaleSics is a lightweight, zero-dependency software emulator for industrial weighing terminals communicating over TCP/IP sockets. It implements the standard MT-SICS (Mettler Toledo Standard Interface Command Set) and MMR (Multi-Range / Multi-Platform) application block protocols, specifically engineered to test, debug, and validate dispensing recipes, dosing workflows, and Electronic Batch Records (EBR) within MES platforms (such as Rockwell PharmaSuite, Werum PAS-X, or custom Java/C# drivers).

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Screenshots

Compact Operator Terminal

Extended Engineering Dashboard

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Key Features

• Dual Display Mode (Operator & Engineering):
  • Compact View: High-contrast LCD terminal front-panel featuring gross/net indication, live status flags, load slider, and membrane keypads (ZERO, TARE, CLEAR TARE).
  • Extended View: Full engineering dashboard with network interface binding, TCP port selection, decimal resolution, engineering units, scale capacity, and live bidirectional socket traffic logging.
• Comprehensive Industrial Protocol Support:
  • Instant response to stable and immediate weight requests (S, SI).
  • Dedicated zeroing and taring functions (Z, T, TAC).
  • Manual Tare (TA <value>): Allows the MES to preset a known container/tare value remotely.
  • Multi-Platform Handshake: Handles platform status queries and scale selection blocks (AR 010 -> AB 1 and SNS 1 -> SNS A).
• Metrology & High Resolution:
  • Configurable resolution up to 5 decimal places (0.00001).
  • Selectable engineering units (g, kg, mg, lb).
  • Toggleable dynamic/stable states and simulated overload/over-range conditions (+ / OVERLOAD).
• Low Latency: Sockets operate with TCP_NODELAY enabled to prevent packet batching (Nagle's algorithm) and ensure immediate telegram round-trip times.

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Supported MT-SICS & MMR Commands

Command	Description	Simulated Response
S	Request stable net weight	S S <10-char value> <uom>\r\n
SI	Request immediate / dynamic weight	S D <10-char value> <uom>\r\n
Z	Zero the scale	Z A\r\n
T	Tare the current load	T S <10-char value> <uom>\r\n
TAC	Clear tare	TAC A\r\n
TA <val>	Preset manual tare from MES	TA A <10-char value> <uom>\r\n
AR 010	MMR query platform / application block	AB 1\r\n
SNS 1	Select scale / platform 1	SNS A\r\n
I2 / I4	Instrument serial number and info query	Identification string response

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Quick Start

Requires Java 11 or higher (no build tools or third-party dependencies required).

Direct Source Execution (Single-File Source Code)

java SimScaleSics.java