Emerson E300 Series Design Manual page 356

Safety Product Mechanical
information information installation
is initialized at power-up and each time the encoder is subsequently initialized with the absolute position including the revolution count if a multi-turn
absolute rotary encoder is used, or the pole pitch count if an absolute linear encoder is used.
The position interface parameter descriptions cover rotary and linear applications, but the revolutions or pole pitches are always referred to as turns.
J53 Drive Encoder Position
Mode RFC-A, RFC-S
Minimum 0
Default
Type 16 Bit Power Down Save
Display Format Standard
Coding RO, ND, NC, PT, BU
See Drive Encoder Revolutions (J52).
J54 Drive Encoder Fine Position
Mode RFC-A, RFC-S
Minimum 0
Default
Type 16 Bit Volatile
Display Format Standard
Coding RO, ND, NC, PT, BU
See Drive Encoder Revolutions (J52).
J55 Sensorless Mode Position
Mode RFC-A, RFC-S
Minimum -2147483648
Default
Type 32 Bit Volatile
Display Format Standard
Coding RO, ND, NC, PT
Whether the drive is operating with or without position feedback Sensorless Mode Position (J55) gives the motor position where the least significant
16 bits represent a movement equivalent to one pole of the motor. The most significant 16 bits represent turns where one turn is the movement
associate with one pole. For example in a rotary application with a 4 pole motor, the movement associated with one pole is a mechanical movement
of 180°. In RFC-A mode Sensorless Mode Position (J55) is aligned with the motor flux and voltages, but this has no fixed relationship to the
mechanical position of the rotor.
J56 Maximum Distance Error
Mode RFC-A, RFC-S
Minimum 0
Default
Type 16 Bit Volatile
Display Format Standard
Coding RO, ND, NC, PT
This sets the maximum distance error threshold in mm. The error is calculated from the integral of Profile Speed (J39) – Actual Speed (J40). Trip 63
(Distance err) is generated when the calculated error is > Maximum Distance Error Threshold (H16) for 1 s continuously.
If Maximum Distance Error Threshold (H16) = 0 then Trip 63 (Distance err) is disabled. Maximum Distance Error (J56) shows the maximum distance
error for the current travel. It is reset when a new travel begins.
J57 Maximum Speed Error
Mode RFC-A, RFC-S
Minimum 0
Default
Type 16 Bit Volatile
Display Format Standard
Coding RO,ND, NC, PT
In closed loop, this sets the maximum speed error threshold in mm/s. The error is calculated from Profile Speed (J39) – Actual Speed (J40). Trip 62
(Speed err) is generated when the calculated error is > Maximum Speed Error Threshold (H15) for 1 s continuously.
356
Electrical Getting
User Menu A Commissioning
installation started
Advanced
Diagnostics Optimization CT MODBUS RTU Technical Data
Parameters
Maximum 65535
Units
Update Rate 4 ms write
Decimal Places 0
Maximum 65535
Units
Update Rate 4 ms write
Decimal Places 0
Maximum 2147483647
Units
Update Rate 4 ms write
Decimal Places 0
Maximum 10000
Units
Update Rate Background
Decimal Places 0
Maximum 10000
Units mm / s
Update Rate Background
Decimal Places 0
E300 Design Guide
Issue Number: 1