I. Basic Information

Model: JANCD-GSC01 / GSC01B / GSC02 (Commonly three types)

Brand: Yaskawa (Yaskawa)

Origin: Japan

Type: Built-in PLC / Sequence Control PCB (Sequence Control PCB)

Compatible System: YASNAC 2000G / 3000G CNC (PLC core for machine side)

Main Control: GMM11/GMM12/GMM22 (Must be paired with GMM)

Board Form: Full-length industrial board, Slot 4 slot position (GMM = Slot 1, GMR/GRT = Slot 2, GRS = Slot 3)

Original Part Number:

GSC01: DF7000066

GSC02: DE6428681

Status: Discontinued (OUT OF STOCK), only second-hand / refurbished items are available for circulation 

II. Core Functions (Differentiating GMR/GRS/GRT)

✅ Built-in PLC operation: Executes machine tool ladder diagram programs (M/S/T codes, interlocks, safety circuits)

✅ I/O logic transfer: 16 input / 16 output signals from GRS01 are processed by GSC logic and then transmitted to GMM

✅ Panel signal analysis: Logic operations of operation panel / MDI keys, mode switching (automatic / manual / MDI)

✅ Alarm and diagnosis: PLC-side alarms (such as emergency stop, limit stop, door opening) generated and displayed

✅ Spindle / Cooling control: Spindle start/stop, speed ratio, cooling pump / lubrication pump logic

❌ No graphics / display: Not responsible for CRT/VGA display (GMR/GRT is responsible)

❌ No motion control: No interpolation, no servo drive (GMM + servo unit is responsible)

III. Hardware Specifications (GSC01/GSC02)

Power supply: Backplane DC5V, approximately 12W

CPU: GSC01 = 16-bit; GSC02 = 32-bit (faster operation)

Program memory: GSC01 = 64KB; GSC02 = 128KB (ladder diagram capacity)

Scan cycle: GSC01 ≈ 8ms; GSC02≈2ms

Temperature: Working range 0℃ to +55℃; Storage range **−25℃ to +85℃**

Weight: Approximately 0.8kg

IV. Interface Definitions (CN1 to CN3)

CN1: System bus → Connects to GMM main controller (data + power supply)

CN2: I/O bus → Connects to GRS01 (16 input / 16 output signals)

CN3: Panel bus → Connects to GRT01 (CRT panel) or directly operates the panel Indicator light

PWR: Normal power supply (always on)

RUN: PLC is running (1Hz flashing)

ALM: PLC is alarmed (always on, such as ladder diagram errors, I/O failures)

VII. Model Differences (GSC01 vs GSC01B vs GSC02)

GSC01 (Basic Version): 16-bit CPU, 64KB, 8ms scanning, compatible with GMM11 (4 axes)

GSC01B (Improved Version): Same as GSC01, optimized for anti-interference, compatible with GMM11/GMM12

GSC02 (High Performance Version): 32-bit CPU, 128KB, 2ms scanning, compatible with GMM22 (8 axes)

VI. Pairing Rules (Strict)

✅ GMM11 + GMR22 + GRS01 + GSC01B: 2000G standard configuration

✅ GMM12 + GMR22 + GRS01 + GSC01B: 3000G basic configuration

✅ GMM22 + GMR24 + GRS01 + GSC02: 3000G high-end configuration (8 axes + 3D)

❌ Mix GSC with GRT: Slot2 can only be inserted with GMR or GRT, GSC is fixed in Slot4

VII. Core Differences from GMM/GMR/GRS/GRT

GMM: Main control / motion control, Slot1, core board

GMR22/24: Graphic display, Slot2, VGA/3D

GRT01: CRT display + panel, Slot2, old-fashioned CRT

GRS01: I/O + communication, Slot3, 16 inputs / 16 outputs + RS232

GSC01/02: PLC / sequence control, Slot4, ladder diagram / logic

VIII. Common Faults

PLC does not run: PWR does not light up (backplane 5V abnormal), RUN does not flash (CN1 loose, ladder diagram damaged)

Panel has no response: CN3 contact failure, mismatch between GSC and GRT versions

Frequent ALM: Ladder diagram logic error, external I/O short circuit, GSC aging

Program loss: Backup battery failure (board-level lithium battery, life approximately 5 years)