FB1.USERBYTE0 to FB1.USERBYTE7

Description

FB1.USERBYTE, FB1.USERWORD, and FB1.USERDWORD share two 32 bit words in an EnDat or HIPERFACE feedback device A process whereby some proportion of the output signal of a system is passed (fed back) to the input. In automation, a device coupled to each motor to provide indication of the motor's shaft angle, for use in commutating the motor and controlling its speed and position. These three parameters offer different ways to store and access the data stored in these two 32 bit words. The table below defines each parameter function. The values are automatically stored non-volatile in the feedback device.

The parameters overlap each other in the following way:

For example, if BYTE1 is modified, WORD0 and DWORD0 are modified as well.

Example

-->FB1.USERDWORD1 65536

-->FB1.USERBYTE1

-->FB1.USERBYTE2

-->FB1.USERBYTE3

-->FB1.USERBYTE3 1 (write to the highest byte of FB1.USERDWORD0)

-->FB1.USERDWORD0

16842752

-->FB1.USERWORD0

-->FB1.USERWORD1

257

General Information

Fieldbus A Fieldbus is an industrial network system for real-time distributed control (e.g. CAN or Profibus). It is a way of connecting instruments in a plant design	Index/Subindex		Object Start Version
EtherCAT ***EtherCAT is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT was to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs COE and CANopen	34B2h/1	FB1.USERBYTE1	M_01-00-00-000
	34B2h/2	FB1.USERBYTE2
	34B2h/3	FB1.USERBYTE3
	34B2h/4	FB1.USERBYTE4
	34B2h/5	FB1.USERBYTE5
	34B2h/6	FB1.USERBYTE6
	34B2h/7	FB1.USERBYTE7
	34B2h/8	FB1.USERBYTE8