Mitsubishi GT1155-QSBD Human-Machine Interface

Estado: Interrumpido. Order acceptance stopped in 2016; factory repair support ended in Oct 2023.

✅ Definición del código del modelo

GT11: GT11 series, entry-level economical GOT

55: 5.7-inch display

q: Q-Bus interface (direct connection to mitsubishi Q-series SOCIEDAD ANÓNIMA bus)

S: Equipped with RS232 + RS422 serial ports

BD: Fuente de alimentación CC24V

📌 Especificaciones principales de hardware

Mostrar: 5.7-inch STN color LCD, 320×240 (QVGA), 256 bandera

Iluminar desde el fondo: CCFL cold cathode lamp (non-replaceable separately; vida útil aprox.. 75,000h @ 25℃)

Pantalla táctil: Matrix resistive touch, supports two-point simultaneous touch

Fuente de alimentación: CC 24 V (20.4~26,4V), typical power consumption 4.32W / 180mamá

Onboard memory: 3MB Flash (project storage), 512KB SRAM (alarmas / recetas)

Real-time clock: Maintained by lithium battery GT11-50BAT for clock and SRAM data

Interfaces:

RS422 (D-Sub9 female, communication with Mitsubishi PLC programming port)

RS232 (D-Sub9 male, for barcode scanners, PC project download)

USB Device (Mini-B, project upload/download, transparent transmission)

Ranura para tarjeta CF (legacy CF card, not SD card)

Maximum screen count: 4096 screens

📡 Communication Capabilities

1. Q-Bus direct connection to Mitsubishi Q-series PLC (core feature of this model)
2. Serial RS422/RS232: Compatible with FX, q, L series; also supports Modbus RTU, Omrón, Delta and other third-party PLCs
3. USB transparent transmission, PC can directly pass through to access downstream PLC

Nota: Sin puerto Ethernet incorporado; direct Ethernet communication is not supported.

🛠️ Programming Software

GT Works2 / GT Obras3 (compatible; select GT1155-QSBD when creating new projects)

Subir & download methods: Cable USB, RS232, tarjeta CF

🔁 Opciones de reemplazo (Factory Recommended)

GT2505-VTBD (Privilegiado)

5.7-pulgada, 65536-color TFT, analog resistive touch (two-point touch is no longer supported)

Panel cutout is largely compatible, but housing is 1.5~2mm larger on top and bottom; cabinet cutout verification required; CF card replaced by SD card

Puerto Ethernet incorporado, mayor rendimiento; projects can be converted and migrated via GT Works3, minor scripts and special functions require modification

Alternativa: GT2705-VTBD (especificación más alta)

⚠️ Common Faults & Puntos de solución de problemas

1. Dim backlight / black screen with responsive touch: CCFL backlight aging, the most frequent failure. No original factory backlight spare parts available; most repairs involve retrofitting LED backlights.
2. Fallo de comunicación: Verify baud rate and station number; do not mix Q-Bus mode and serial mode; avoid reversed A/B wiring for RS422.
3. Pérdida de tiempo / recipe reset: Built-in lithium battery GT11-50BAT depleted; replace battery directly.
4. CF card not recognized: Only standard legacy CF cards are supported. High-speed CF cards and CF-to-SD adapters are often unstable.
5. Touch drift / local touch failure: Wear of matrix resistive film; replace touch panel.

📏 Installation & Calificación ambiental

Montaje: Embedded panel mount with snap fasteners

Entorno operativo: 0~50 ℃, IP65 on front face (with installed sealing gasket), IP20 on rear side

1. Separar & Dimensiones generales (GT1155-QSBD)

Unidad: milímetros, standard landscape installation

Recorte del panel: 153 (W.) × 121 (h), tolerance +0~+1mm, cabinet plate thickness recommended 1.6~5mm

Dimensión general: 164 (W.) × 135 (h) × 55 (D)

Espacio libre de instalación: Reserve ≥10mm space top and bottom for snap disassembly; install factory gasket in sealing groove to maintain front IP65 rating

⚠️ GT2505-VTBD cutout: 156 × 124, 3mm wider and taller than the original. Original cutout will be undersized. On-site solutions:

1. Enlarge cutout (privilegiado); 2. Install adapter flange plate; 3. Switch to GT2705-VTBD (cutout fully compatible with original 153×121)
2. Q-Bus Wiring for Direct Q-CPU Connection

The Q-Bus of GT1155-QSBD is not a DB9 serial port. It is an onboard dedicated Q-Bus interface, using GT01-C30R2-6P flat bus cable plugged directly into the front bus port of Q-CPU. It cannot be made with ordinary RS422 cables.

Communication mode setting: Select Q CPU (Direct Bus Connection) in the GOT connection target, not RS422

Important restrictions:

Q-Bus only supports Q-series CPU (Q00/Q01/Q02/Q03UD/Q04UDH, etc.), not L/R/FX series

Bus channel and rear DB9 RS422 serial port are independent; do not use both simultaneously

Max cable length: 3metro; no station number required for bus communication, direct CPU access

Matching cable part numbers: GT01-C10R2-6P (1metro) / GT01-C30R2-6P (3metro)

【Alternative serial connection to Q PLC】Using DB9 RS422, seleccionar “Q CPU Serial Connection”. Standard Mitsubishi RS422 DB9 pin definition:

Shield single-ended grounding only at PLC side; grounding at both ends causes circulating interference current.

3. Full Migration Checklist: GT11 Project → GT2505-VTBD (GT Obras3)

Requisito previo: GT Works3 V1.115 or newer. Older versions have many conversion bugs for legacy GT11 projects.

Paso 1: Backup Original Project

1. Open GT1155-QSBD project in GT Works2 / GT Obras3
2. Save a separate original copy (.G11). Do not convert directly on the original file.
3. Upload project from HMI first (tarjeta CF / USB) to avoid inconsistency between source file and program inside HMI.

Paso 2: Model Conversion

1. Menú: Project → Change Model
2. Source model: GT1155-QSBD; modelo objetivo: GT2505-VTBD
3. Conversion options: Check screen conversion, comments, alarmas, recetas; uncheck legacy GT11 exclusive OS functions

Critical resolution note: GT11=320×240; GT2505=640×480. Screens scale 2× automatically, component positions shift. Every screen must be adjusted manually!

Paso 3: Communication Verification (Critical for Q-Bus Version)

✅ Major risk: GT25 series has NO onboard Q-Bus interface!!

This is the biggest pitfall for GT1155-QSBD replacement. The native Q-Bus direct link is removed on GT25. Two retrofit options:

Opción A (Recomendado): Add QJ71E71-100 Ethernet module to Q PLC, GT25 communicates via SLMP over Ethernet TCP

Opción B: Abandon bus, use RS422 serial to connect Q CPU programming port, set connection target to 【Q CPU Serial】 and replace with RS422 cable

❗ Original GT01-C30R2-6P flat bus cable CANNOT be reused; the hardware interface no longer exists.

Paso 4: Functional Inspection Checklist

Screens: Botones, lámparas, numeric input, bar graphs, text; fix overflow and overlapping elements after scaling

Scripts / Macros: Legacy GT11 C scripts and bitwise functions may be incompatible; rewrite scripts with errors

Alarm records: Verify alarm trigger conditions, pop-up windows and alarm reset logic

Recipes: Migrate GT11 SRAM recipes to GT25 Flash / SD storage; check D register offset addresses

Real-time clock: GT11 uses GT11-50BAT; GT2000 uses different battery model

Transparent transmission: Reconfigure USB transparent and serial transparent channels for GT25

CF card functions: Legacy CF on GT11 replaced by SD on GT25; modify file paths for log/recipe export in scripts

Third-party communication (Modbus etc.): Velocidad de baudios, parity and station numbers are generally compatible, frame timing requires testing

Paso 5: Descargar & Power-On Test Procedure

1. Después de la conversión, compile and resolve all errors and warnings before download
2. Download to GT25; do not hot-swap on site directly. Test communication on bench first.
3. Register verification: Randomly read/write X/Y/M/D registers and cross-check with PLC online monitor
4. Touch test: GT11 supports two-point touch, GT25 analog resistive is single-point only. Any logic relying on simultaneous dual-touch must be modified
5. Verify backlight, buzzer and screen switching speed
6. Piezas de repuesto & Consumables List

Batería: GT11-50BAT (original for GT1155-QSBD, 3V lithium, clock and SRAM recipe backup)

Sealing gasket: GT1155-QSBD dedicated gasket; front IP65 rating fails once aged

tarjeta CF: Only standard legacy CF (≤2GB). High-speed CF and CF-to-SD adapters have poor compatibility

Communication cables: GT01-C10R2-6P / GT01-C30R2-6P (Q-Bus flat cable)

5. Supplementary Quick Troubleshooting for Q-Bus
6. Communication error alarm: Confirm connection target set to 【Q Bus】 not RS422; bent pins and loose plugs on flat cable are common faults
7. Bus connected but register read failure: Verify accessible soft element range of Q-CPU; some special registers are restricted under bus mode
8. Intermittent disconnection: Flat cable damage from repeated bending; separate bus cable from power cables and add ferrite core.

GT1155-QSBD Replacement & Engineering Change Implementation Plan

Core constraint: Q-Bus is exclusive to the old model. GT25/GT27 have no such hardware interface. Communication architecture modification is mandatory; it is not a simple panel swap and program download.

Two replacement routes:

Route A: GT2505-VTBD (rentable, cutout mismatch, SLMP Ethernet / RS422 serial)

Route B: GT2705-VTBD (original 153×121 cutout compatible, less cabinet modification, Ethernet)

7 work modules: ECN Engineering Change Notice, BOM Update, Electrical Drawing Update, HMI Project Migration & Update, PLC Side Modification, Operation Document Update, On-Site Validation & File Archiving

1. ECN Engineering Change Notice (Formal Approval Document for Purchasing / Producción / Aftersales / Customer)

Required contents in ECN:

1. Change reason: GT1155-QSBD discontinued, factory spare part supply terminated
2. Old part: GT1155-QSBD; New part: GT2505-VTBD / GT2705-VTBD
3. Communication change (llave):

Original: Q-Bus flat cable GT01-CxxR2-6P direct to Q-CPU

New two options:

✅ Opción 1 (Privilegiado): Add QJ71E71-100 Ethernet module to Q PLC, HMI SLMP over Ethernet TCP

✅ Option2: Remove bus, use RS422 serial to PLC programming port

4. Scope of impact: lista de materiales, electrical schematic, cabinet cutout, alambrado, HMI project, PLC network parameters, spare part list, operation manual
5. Rollout timing: New orders fully switch over; field replacement for breakdown maintenance on demand
6. Risk items: Screen scaling offset, dual-touch logic invalid, CF changed to SD, dedicated bus cable obsolete
7. Approval signature: Eléctrico, software, proceso, adquisitivo, customer (if end-user equipment)

Attachments: Comparison table, communication topology drawing, cutout comparison, informe de prueba

2. BOM Update
3. Remove items: GT1155-QSBD, GT01-C10R2/30R2-6P Q-Bus flat cable, GT11-50BAT battery, GT11 dedicated gasket, legacy CF card
4. Add items (per selected scheme):

HMI unit: GT2505-VTBD or GT2705-VTBD

Ethernet scheme: QJ71E71-100, Cat5e cable, RJ45 connector, cambiar (if needed)

Serial scheme: Mitsubishi RS422 communication cable (D-Sub9)

Consumables: GT2000 series gasket, industrial SD card, GT2000 battery

3. BOM remark: Replaces GT1155-QSBD, communication changed from Q-Bus to SLMP Ethernet / RS422, see drawing for cutout difference
4. Slow-moving material control: Mark legacy bus cable and GT11 battery separately, no longer bundled for new machines
5. Electrical Drawing Update (CAD / EPLAN)

1) Schematic

Delete Q-Bus interface and bus cable loop

Agregar:

Ethernet scheme: QJ71E71-100 power supply, network wiring, IP allocation table

Serial scheme: HMI RS422 DB9 wiring (A/B/SG)

Power circuit remains DC24V generally; verify power rating and add remark on drawing

Add network topology drawing: IP table for PLC, HMI, SCADA, cambiar (SLMP requires unified IP & station planning)

2) Cabinet Cutout & Panel Machining Drawing

Route A (GT2505-VTBD): Original 153×121 → New 156×124

Drawing note: Enlarge cutout by 3mm or use adapter flange

Route B (GT2705-VTBD): 153×121 compatible, only update model marking

Front panel nameplate: Update model

3) Terminal Diagram & Cabinet Layout Drawing

Remove original bus connector location; update routing for network / serial cable; mark shield grounding specification

4. HMI Project Migration & Version Update (Core Work)

Recommended software: GT Works3 V1.115 or newer

1. Source archive: Separate backup of original .G11 project + HMI upload backup (tarjeta CF). Keep legacy archive, do not overwrite.
2. Model conversion: Project → Change Model, GT1155-QSBD → GT2505/GT2705-VTBD
3. Screen adjustment (320×240 →640×480 auto 2× zoom):

Correct overflow, overlapping text, trend and alarm window on each screen

Crítico: Dual simultaneous touch function no longer works. If interlock logic relies on dual press, migrate logic to PLC or rewrite HMI script

4. Reconfigure communication target (major risk point)

Delete old 【Q CPU (Direct Bus Connection)】

Ethernet SLMP: New connection target → QCPU (Ethernet SLMP), fill IP, network No., station No.

Serial scheme: New 【Q CPU Serial Connection】, match baud rate and parity with PLC

5. Functional revision

CF export for logs/recipes: Change all file paths to SD in scripts

Legacy GT11 macros / C scripts: Rewrite incompatible functions and test

Recipe: SRAM recipe migrated to Flash / DAKOTA DEL SUR, verify D register offset

Alarma / history log: Export medium changed from CF to SD

Transparent transmission: Reconfigure USB and serial transparent channels

6. Compilar, clear warnings, generate new .G2S project, upgrade version number (Vx.x, remark: GT1155-QSBD replacement)
7. Download test: Bench communication test first, then online with PLC, spot check M/D register read/write consistency
8. PLC Program & Parameter Update (Q Series)
9. Ethernet scheme (QJ71E71-100):

Configure Ethernet module parameters in GX Works2: IP, subnet mask, station No., enable SLMP service

Enable MELSOFT connection, allow GOT access to soft elements

Verify access permission for special registers and latch memory

2. Serial scheme: Match PLC programming port serial parameters, avoid conflict with other SCADA
3. PLC ladder logic usually unchanged, unless dual-touch interlock logic exists on HMI; move such logic into PLC
4. Upgrade PLC project version, add change log note: Adapted for HMI replacement
5. Manual de operación, Maintenance Document & Aftersales Material Update
6. Operation manual:

Update HMI model, download method (USB/SD/Ethernet; remove CF and Q-Bus chapters)

Add IP table and SLMP communication troubleshooting section

Delete two-point touch operation description

2. Mantenimiento & fault manual:

Remove GT01 bus cable troubleshooting and CCFL backlight content

Add new items: Ethernet offline, SLMP communication error, SD log export, GT2000 battery replacement

3. Spare part manual: Replace all part numbers, remove discontinued SKUs
4. Validación, Prueba & Document Archiving (Closed-Loop Control)

Test Checklist

Encendido, iluminar desde el fondo, buzzer and touch function for all screens

Communication stability: Continuous run ≥2h, no packet loss or cyclic disconnection

Botón, lamp, numeric value, bar graph and trend operation

Alarm trigger, reset and history log storage (DAKOTA DEL SUR)

Recipe read/write and power-off retention

RTC retention and battery drop-out test

Screen switching speed comparison

EMC interference test under same cabinet environment with power cables

Archive Package (Complete Change File Set)

1. ECN notice + approval sheet
2. Viejo & new BOM comparison
3. Updated electrical drawing (PDF + source)
4. Legacy GT11 project backup + new GOT2000 project
5. PLC program and parameter backup
6. Validation test report
7. Revised operation & maintenance manual

Suplemento: Field Breakdown Replacement (Not for New Production Units)

For on-site repair replacement of failed old panels, not new machine BOM:

1. Evaluate if customer accepts cutout enlargement / flange adapter and Ethernet module addition
2. If modification scope is restricted: Adopt RS422 serial scheme without adding QJ71E71, minimal modification with slower communication speed
3. Issue field change form, commissioning record and version remark separately for site retrofit log.
4. Full GT11 Series Model List (GT115□ 5.7 pulgada, All Discontinued)

1) Standard Panel Mount (GT1155 / GT1150)

① GT1155 (Color 256-color, 320×240 QVGA)

STN Type (Same series as QSBD)

1. GT1155-QSBD (Estándar, Q-Bus, flagship model)
2. GT1155-QSBDQ (Q-Bus, early CF hardware version)
3. GT1155-QSBDA (A-Bus version for A-series legacy PLC)

TFT High-Bright Color

4. GT1155-QTBD (color, Q-Bus)
5. GT1155-QTBDQ (Q-Bus + early CF interface)
6. GT1155-QTBDA (A-Bus version)

② GT1150 (Monochrome 16-level grayscale STN)

7. GT1150-QLBD (Q-Bus monochrome)
8. GT1150-QLBDQ (Q-Bus + early CF interface)
9. GT1150-QLBDA (A-Bus version)

2) Handy Portable GOT

10. GT1155HS-QSBD (Handheld STN color, Q-Bus, same hardware as GT1155-QSBD)
11. GT1150HS-QLBD (Handheld grayscale, Q-Bus)

3) China-Specific Suffix (-do, No Built-In Battery)

GT1155-QSBD-C

GT1155-QTBD-C

GT1150-QLBD-C

2. Suffix Definition
3. q: Built-in Q-Bus interface for direct Q-CPU connection (key feature of this model)
4. SBD: STN color LCD (GT1155-QSBD)
5. TBD: LCD TFT en color (higher brightness)
6. LBD: Monochrome grayscale screen (GT1150 series)
7. Trailing Q: Early CF hardware revision
8. Trailing A: A-Bus for legacy A-series PLC
9. SA: Handy handheld GOT
10. GT11 Series Accessory List

1) Q-Bus Communication Cables

GT01-C10R2-6P (1metro)

GT01-C30R2-6P (3metro, commonly used on site)

2) Consumables & Guardado

Batería: GT11-50BAT (3V lithium, RTC and SRAM recipe backup, compatible across series)

Memory card: Legacy standard CF only (max 2GB; CF-to-SD adapters unstable)

Sealing gasket: GT1155 dedicated gasket for front IP65

3) Option Boards

GT11-50FNB: CF card expansion board

GT11-70PSCB: Printer interface board

4. Replacement Mapping (GT11 → GT2000)

5. Discontinuation Note (For BOM Remark)

Production discontinued: Oct 2016

Repair support terminated: Oct 2023, no new original factory stock available