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The official installation guide (2001 version) for SINUMERIK 840C with SIMODRIVE 611-D driver covers all software versions of SW 1-6, with installation prerequisites, overall cleaning and standard startup, PLC installation, MMC diagnosis, machine data configuration, servo debugging, axis/spindle debugging, data backup, and functional explanation as the core process. It clarifies mandatory specifications such as EMC grounding, module anti-static, resolution setting, memory allocation, etc. It provides flowcharts, diagnostic methods, parameter tables, and checklists to guide the entire process of system power on, configuration, debugging, and acceptance, ensuring reliable operation of the CNC system and driver.
Installation prerequisite and appearance inspection (mandatory requirement)
Prerequisites
Mechanical/electrical installation completed, shaft movable
PLC program debugging completed, measurement system wiring is correct
Grounding follows star shaped single point grounding and complies with DIN VDE 0160
inspection items
Module anti-static: MOS chips require grounding discharge operation
Shielding: Single ended grounding of cable shielding layer
Encoder: installation gap, wiring, shielding compliance
Cable: Separate power and signal wiring, no grounding loop
System version: Distinguish between standard version and export version (CE), export version does not have 5D interpolation or IKA extension
General clearance and standard initiation process
1. General Reset mode
Function: Factory reset, clear erroneous data, initialize NCK/PLC/driver
Operation: Diagnosis → Start → General Clear Mode
Executable:
FORCEDBOOT: Forced boot system
PLC GEN. RESET: Clear PLC and load ANW-PROG
DRIVE GEN. RESET: Clear 611D driver configuration
Format NCK AWS: Format User Data
2. Memory configuration (SW3 and above)
Typical Range Description of Memory Types
DRAM 4MB/8MB component program UMS、IKA、 Block buffer
SRAM 64KB tool compensation, R parameters
IKA Memory 0~1024KB Table Compensation/Temperature Compensation
Block buffer 0-5026KB pre read buffer
3. Standard startup steps
Set the startup switch to Startup
Loading system software, date and time
Memory configuration → Load machine data
Exit the main clearing → System starts normally

PLC installation and diagnosis
PLC model
PLC 135 WB2 (SW ≤ 2): EPROM loading program
PLC 135 WD (SW ≥ 3): Hard disk loading program
Debugging process
Connect PG7 programmer → Load user program → PLC overall cleaning
Automatically load hard disk ANW-PROG
diagnostic methods
LED hardware malfunction light
USTACK detailed error code
PLC status: I/Q/F/DB/T/C monitoring
Timeout analysis: disable bus buffer to locate faults
MMC regional diagnosis (human-machine interface)
core functionality
Password protection: MMC/NCK independent password, default 1111
Language switching (SW ≥ 5): System/WOP/Simulation/PG
Screen printing: TIFF/PCX compression format
Alarm log: sorted by time/priority
data backup
VALITEK tape backup full data
Hard disk storage: NC/PLC/driver/IKA data
CPU replacement: restore backup → reboot
Machine tool data and parameter configuration
data classification
NC MD: axis, channel, spindle, resolution
PLC MD: System, Function Blocks, User Positions
Drive MD: 611D servo parameters
Set data SD and loop data
key parameters
Position resolution: 0.0005mm/0.001mm
Servo gain KV: NC MD 252*
Acceleration: NC MD 276*
Monitoring: contour monitoring, tracking error monitoring
Servo debugging and axis/spindle optimization
Servo loop debugging
Current loop → velocity loop → position loop
Function Generator: Signal Excitation Test
SERVO trace (SW ≥ 4): oscilloscope monitoring
Quadrant error compensation QEC
Conventional QEC and Neural Network QEC (SW ≥ 4)
Roundness testing optimizes contour accuracy
Shaft/Spindle Installation
Zero return method: Normal/distance encoding reference point
Spindle mode: open-loop, oscillation, positioning (M19), C-axis
Gear shifting, speed limit, drift compensation
Advanced Function Description
Gear interpolation GI
Master slave axis synchronization, gantry axis, and gear hobbing applications
Speed/position coupling, fault synchronization maintenance
IKA compensation
Table compensation, temperature compensation, gap compensation
Collision monitoring (SW ≥ 6)
Protection area definition, feed reduction, alarm shutdown
Other functions
Parameter group switching, absolute encoder, ESR emergency tool return, UPS power-off protection
Acceptance and Installation Checklist
Must be tested items
Voltage test: 230V AC, 24V DC normal
Axis motion: 10mm command=10mm actual
The spindle speed, positioning, and gear shifting are normal
Safety functions: emergency stop, limit, hardware enable
data backup
All NC/PLC/driver/loop/IKA/QEC data are archived
Installation checklist signing and archiving
Key issues
Question 1: What is the purpose of performing a General Reset on 840C, and what key data will be cleared after execution?
Answer: Zongqing is used for system initialization, data error recovery, and resetting after hardware replacement; It will clear NCK user data, PLC user program, 611D driver configuration, tool compensation, R parameters, zero offset, and restore default machine data, and reload the ANW-PROG PLC program on the hard drive.
Question 2: What steps should be taken to troubleshoot the stop fault of the 840C PLC?
Answer: 1 Check the PLC CPU LED to determine hardware failure; 2. Enter diagnosis to view detailed USTACK error codes; 3. Check I/O enable, emergency stop, and bus communication; 4. Verify PLC programs, machine data, and timeout parameters; 5. Re execute the PLC overall cleaning and recovery program.
Question 3: How to set the axis resolution of 840C and what impact does it have on machining?
Answer: Set the position/input resolution through NC MD 1800 *, 5002, 524 *, commonly 0.0005mm/0.001mm; The higher the resolution, the higher the positioning accuracy, but it will affect the maximum speed, zeroing stability, and computational load, which must be matched with the number of encoder lines.

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