PC834-001-N brushless servo driver

Description

PC834-001-N brushless servo driver

PC834-001-N brushless servo driver

There can be cause for concern when this p-p number exceeds 40% of the drive’s or motor’s current rating. The motor current should be monitored using Dac Monitors on J2-4 to insure actual ripple current, with ARF0/ARF1 filtering, is not excessive. Motor current ripple can often be reduced by lowering the ARF0, ARF1 low-pass filter break frequencies. This benefit is limited by velocity loop bandwidth and stability constraints. Velocity feedback ripple, and hence motor current ripple, can also be reduced by specifying a higher accuracy resolver.

Setting KVFF equal to 100% can result in position overshoot. Somewhat lower values may be required if this is a problem. KVFF set to 70%-80% typically achieves the fastest step response with no overshoot. However, setting KVFF to less than 100% will give steady state following error when running at constant speed.

The equipment described herein has been developed, produced, tested and documented in accordance with the corresponding standards. During use conforming with requirements, the equipment is not dangerous for people or equipment. Use conforming with requirements means that the safety recommendations and warnings detailed in this manual are complied with and that the applicable regulations for safety (machine directives, etc.) and noise suppression (EMC Directives) are observed while operating the drive. At the end of its lifetime, dispose of or recycle the drive according to the regulations applicable at that time.

Communication process description: The communication process specifically involves reading process data from the serial interface of the PLC device through different protocol devices into various “virtual” Slots in FTA, and then writing the data into the Image DataBase of APM through SI IOP. APM reads these data into the corresponding SI Array Point of the group state within a certain period of time (corresponding to the assigned address).

Communication process:
The process data that needs to participate in communication in the PLC is configured in the communication register, with the bit number corresponding to the address. The serial communication data block with the format (configuration address+process value+check bit) is sent to FTA through the serial communication line, and the address and process data are separated from the format data block. Reference the Array Point address corresponding to the Slot configured in the APM of DCS, and transfer the data to the correct Array Point. In Modbus FTA, data is scanned at a speed of 19.2Kbaud, while in Allen Bradley FTA, each Array Point can choose a different scanning method: A, free running (user-defined time scanning); B. Periodic (fixed period scanning); C. Report by exception (event triggered scanning RBE); In APM, there are three speeds for scanning data from Image DataBase (1/4 second, 1/2 second, and 1 second).

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