A20B-8100-0770 | FANUC Fast Data Server PCB A — ATA Flash Storage / 15i / 16i / 18i / 21i / 0i Model B / High-Speed Programme Storage
What the Fast Data Server Does
Before the Fast Data Server was introduced, FANUC CNC systems running large part programmes faced a hard constraint: the programme had to fit entirely within the CNC's internal memory before it could execute. For complex aerospace components, multi-surface die and mould cavities, or long thread-milling programmes, this memory limit was reached regularly. The alternatives — breaking the programme into sections, compressing it, or using DNC streaming over RS-232C — added complexity and constrained feedrate.
The Fast Data Server addresses this directly. It stores large programmes on an ATA flash card installed in the server, and streams them at high speed to the CNC's execution buffer as the programme runs. The CNC sees a continuously fed stream of G-code blocks — the programme appears to the CNC as if it fits in memory, while the Fast Data Server handles the storage and feed-ahead management transparently.
Key Specifications
| Parameter |
Value |
| Part Number |
A20B-8100-0770 |
| Function |
Fast Data Server (local high-speed storage) |
| Compatible |
15i, 16i, 18i, 21i, 0i Model B |
| Storage |
ATA flash card via CNH6 connector |
| Companion |
A20B-2002-0960 (ATA adapter) |
| Cable |
A660-2040-T010 |
| Weight |
0.1 kg |
Fast Data Server vs Standard DNC — Key Differences
Both the Fast Data Server and standard DNC (Direct Numerical Control via Ethernet or RS-232C) allow the CNC to run programmes from external storage. The difference is in speed, reliability, and independence:
DNC over network/serial: Depends on network connectivity and server availability. Network latency introduces timing variability. At high feedrates, network delay can cause the CNC's execution buffer to empty momentarily — forcing deceleration. This limits the maximum feedrate achievable during network DNC.
Fast Data Server: Stores the programme locally on the ATA flash card in the CNC cabinet. No network dependency. High-speed transfer from flash to the CNC execution buffer maintains a full buffer even at high feedrates. The CNC runs at its maximum programmed feed without network-induced hesitation.
For high-speed contouring applications — where maintaining constant feedrate is critical for surface finish — the Fast Data Server's local, high-speed storage is the correct solution.
Application Scenarios
Fast Data Server board failure: A high-speed machining centre with Fast Data Server develops a board fault — the CNC can no longer access its locally stored large programmes. The A20B-8100-0770 is identified as the failed board. Replacement (with the software option confirmed active) restores Fast Data Server functionality.
High-speed mould machining setup: A mould machining centre requires Fast Data Server to run multi-surface contouring programmes at maximum feedrate. The A20B-8100-0770 and its companion adapter board provide the local high-speed storage that keeps the execution buffer full at 40,000 mm/min feedrate.
FAQ
Q1: What ATA flash card capacity is supported by the A20B-8100-0770?
The ATA flash card capacity supported by the Fast Data Server depends on the FANUC software version and system configuration. FANUC's Fast Data Server documentation specifies the range of supported ATA card sizes for each system generation. Confirm from the FANUC maintenance manual for the specific CNC model before selecting a flash card.
Q2: Can the A20B-8100-0770 be installed in any option slot on the CNC main board?
No. The Fast Data Server has slot restrictions. The FANUC connection manual for the specific i-series CNC lists the slots where the Fast Data Server may and may not be installed. Incorrect slot placement can result in the board not functioning or causing conflicts with other option boards in adjacent slots.
Q3: If the A20B-8100-0770 fails, does the ATA flash card data need to be re-written?
The ATA flash card data (stored programmes) resides on the card itself, not on the A20B-8100-0770 PCB. If the card is undamaged, the stored programmes remain intact and can be accessed immediately after fitting a replacement A20B-8100-0770. The card is the storage medium; the PCB provides the interface and control logic only.
Q4: Is the A20B-8100-0770 suitable for DNC streaming over Ethernet instead of local flash?
No. The A20B-8100-0770 Fast Data Server is specifically for local ATA flash card storage and streaming. It does not provide Ethernet DNC functionality. Ethernet DNC is handled through the CNC's built-in Ethernet port (available on 0i-D and newer platforms as standard) or through a separate Ethernet board option. The two functions are independent.
Q5: What maintenance does the ATA flash card require over time?
ATA flash cards have a finite write endurance — each memory cell can be written a limited number of times before reliability degrades. For a Fast Data Server that receives frequent programme transfers (writing new programmes to the card), the card's write endurance is a consideration. Periodically check the card's status if the CNC provides diagnostic information about the Fast Data Server storage. Some facilities maintain a spare card pre-loaded with the production programme library to enable rapid swap on card failure.
PAYMENT INFO:
ESCROW / PAYPAL are only for the goods value 500$ or less.
Bank Transfer / Western Union are ok for any goods.
Handling charge ESCROW: 5-5.1%; Paypal: 3.9-4.4%
SHIPPING INFO:
*** Pls inform us, once you transfer payment by ny form, for us follow up in time.
*** Items are typically sent out 3-5 Working Days, after payment has been received.
Will ship worldwide (Please ask us first if you do not see an exact price for shipping for your country)
* FREE Shipping is not AVAILABLE for the buyers who are from some certain coutires DHL / Fedex are not avaiable for, Pls contact us for the detailed SHIPPING Cost.
Cross-border buyers are responsible for any CUSTOMS DUTY, TAX, etc. imposed by the buyer's home country.
************************************************************************************
PLEASE NOTIFY US WITHIN 10 DAYS, IF YOU HAVE NOT RECEIVED GOODS
&
PLEASE NOTIFY US AT THE SAME/ NEXT DAY, IF GOODS ARRIVE DAMAGED / NOT COMPLETE / NOT DESCRIBED
************************************************************************************
We DO COMBINE SHIPPING on multiple purchases!
Local Pickup Available
WARRANTY & RETURN:
** THREE Months WARRANTY for the Used goods**
** SIX Months WARRANTY for the New / Unused goods**
** Buyer Pays the Return Shipping Cost of Warranty **
*** We Accept RETURNS if goods arrive DAMAGED / NOT DESCRIBED / NOT COMPLETE.
*** We Accept RETURNS if goods are NOT WORKABLE in 4 Days After Goods Arrive.
.*** We do not offer Warranty, if after buyer collect goods, it become Physically Damaged or Improper Operated.
*** We do not accept RETURNS because the Wrong item was purchased or the buyer has changed their Mind.
***The Return goods must be in Original Same as we Sent with the Warranty Label On.
QUESTIONS
Please feel free to send us any question you may have, we are happy to answer!
Special arrangements will be made for bulk orders / pick-ups, please ask!
*If you do not see it listed, ASK US, we can list it for you!
BUSINESS HOURS
We are normally here between 9:00 A.M. and 5 P.M. Mon-Fri.
FEEDBACK
Feedback is left for buyers as soon as payment is received.
We ask that you leave us 5 star feedback once you get your item (s) in satisfactory condition.
If there is any problem, please notify us before you leave any feedback!
We always strive to resolve any issue.
Our customers are very important to us!
We Appreciate Your Business!!
Your message must be between 20-3,000 characters!
