FB#.INITSIGNED

Description

FB#.INITSIGNED configures the use of the sign bit for multiturn feedback devices, and determines the initial sign of the 64-bit position feedback (FB#.P) at power-up. The initial position needs to be treated as signed or unsigned, depending on the application.

FB#.INITSIGNED takes effect when the 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 is initialized, for example when it is first selected or later reset. FB#.INITSIGNED does not change the feedback position after the device has been initialized.

• 
  
• Linear encoders are not supported.

Usage

• Setting FB#.INITSIGNED to 0 treats the initial position feedback as an unsigned value. FB#.P will always be set to a non-negative value at initialization.
• Setting FB#.INITSIGNED to 1 treats the initial position feedback as a signed value. If the most significant bit of the multiturn bits from the feedback is 1, FB#.P will be sign extended to a 64-bit negative value.

Context

See Feedback # View.

Versions

Action	Version	Notes
Implemented	02-07-00-000

General Information

Type	Read/Write
Units	N/A
Range	0, 1
Default Value	1
Data Type	Integer
Stored in Non-Volatile Memory	Yes

Variants Supported

All variants are supported.

Fieldbus Information

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

Command	Index	SubIndex	Data Type	Units	Float Scale	Access	PDO PDO is a type of protocol frame used in some fieldbuses. A PDO contains one or more object dictionary entries, which define the application data transferred between devices. Mappable
FB1.INITSIGNED	3500h	11h	Unsigned8	-	-	Read/Write	No
FB2.INITSIGNED	3501h	11h	Unsigned8	-	-	Read/Write	No
FB3.INITSIGNED	3502h	11h	Unsigned8	-	-	Read/Write	No
FB4.INITSIGNED	3503h	11h	Unsigned8	-	-	Read/Write	No
FB5.INITSIGNED	3504h	11h	Unsigned8	-	-	Read/Write	No

EtherNet/IP

Name	ID	Hex	Data Type	Access	Units
FB1.INITSIGNED	30540	774C	Unsigned8	Read/Write	-
FB2.INITSIGNED	30541	774D	Unsigned8	Read/Write	-
FB3.INITSIGNED	30542	774E	Unsigned8	Read/Write	-
FB4.INITSIGNED	30543	774F	Unsigned8	Read/Write	-
FB5.INITSIGNED	30544	7750	Unsigned8	Read/Write	-

PROFINET

Parameter	PNU	Data Type	Access	Units
FB1.INITSIGNED	30540	Unsigned8	Read/Write	-
FB2.INITSIGNED	30541	Unsigned8	Read/Write	-
FB3.INITSIGNED	30542	Unsigned8	Read/Write	-
FB4.INITSIGNED	30543	Unsigned8	Read/Write	-
FB5.INITSIGNED	30544	Unsigned8	Read/Write	-