I. Basic Specifications

Model: JANCD-GMM11 / GMM12 / GMM22 (collectively referred to as GMM)

Type: Main CPU + Program / Data Memory Composite Board

Compatible Systems: YASNAC 2000G, 3000G (GMM22 compatible with 3000G high-end version)

Power Supply: DC5V (direct supply from the back panel, power consumption approximately 25–35W)

Form: Full-length industrial board card, gold finger slots (same slot position as GMR/GRT)

Temperature: Working range 0℃~+55℃; Storage range -25℃~+85℃

Humidity: 30%~95% RH (no condensation)

Chip: 32-bit dedicated CNC processor; GMM11 = Basic version, GMM12 = Medium configuration, GMM22 = High configuration (larger cache / stronger computing power)

II. Interfaces and Indicators

CN1: System Bus (connects GMR22/GMR24 graphics board, GRT01 display IO board)

CN2: Axis Control Bus (connects servo amplifier / axis card)

CN3: MDI / Panel Interface (buttons / data display interaction)

CN4: Serial Port (DNC transmission, baud rate 1200–9600)

Indicators:

PWR: Power normal (always on)

RUN: System running (flashes)

ALM: System alarm (always on / fast flashing)

MEM: Memory read/write (flashes)

III. Core Functions

Program Execution: G-code / M-code parsing, interpolation calculation, trajectory planning (controls up to 8-axis linkage)

Memory Management: Program storage (GMM11 = 256KB, GMM12 = 512KB, GMM22 = 1MB), tool compensation / parameters / macro program storage

Display Control: Sends display data to GMR22/GMR24, drives CRT coordinates / program / alarm interface

IO Scheduling: Interacts with GRT01, handles machine emergency stop, limit switch, relay output, etc. (switching quantities)

Communication: DNC serial port transmission, external device data interaction, system diagnosis and monitoring

IV. Version Differences (GMM11 vs GMM12 vs GMM22)

GMM11: Basic model, 256KB memory, 4-axis linkage, compatible with 2000G standard model

GMM12: Medium configuration model, 512KB memory, 6-axis linkage, compatible with 2000G/3000G general model

GMM22: High configuration model, 1MB memory, 8-axis linkage, enhanced computing power / anti-interference, compatible with 3000G high-end / complex processing

V. Installation and Maintenance

Installation: Main slot on the back panel of the control cabinet (usually Slot1), push vertically and lock, align the gold fingers

Wiring: DC5V power supply on the back panel; CN1–CN4 away from power lines / frequency converters to avoid interference

Maintenance: Regular dust cleaning, clean gold fingers; Back up parameters / programs (to prevent memory loss)

Faults:

No display: GMM not started / CN1 bus loose / power supply abnormal

Program loss: GMM memory battery failure (replace with CR2032)

Axis not moving: CN2 axis control bus failure / servo communication abnormal

High alarm frequency: GMM chip aging / cache error / version incompatibility