Table 7-4 Restrictions Of Drive Encoder Lines Per Revolution With Software Version V01.06.01 And Later - Emerson Digitax ST User Manual

Safety Product Mechanical
Information information installation
Absolute SSI communications only encoder, or
Absolute Sincos encoder with SSI
Encoder type
Encoder power supply voltage
Encoder number of lines per
revolution. (SC.SSI only)
SSI binary format select
Encoder turn bits
Encoder single turn comms resolution
Encoder comms baud rate
Encoder error detection level
UVW commutation signal only encoders*
Encoder type
Encoder power supply voltage
Encoder number of lines per
revolution
Encoder error detection level
* This feedback device provides very low resolution feedback and should not be used for applications requiring a high level of performance.
7.3.3 Restriction of encoder number of lines per revolution
Although Pr 3.34 can be set to any value from 0 to 50,000 there are restrictions on the values actually used by the drive. These restrictions are
dependent on the software version as follows:
Software version V01.06.01 and later

Table 7-4 Restrictions of drive encoder lines per revolution with software version V01.06.01 and later

Position feedback device
Ab, Fd, Fr, Ab.SErVO, Fd.SErVO,
Fr.SerVO, SC
SC.HiPEr, SC.EndAt, SC.SSI
(rotary encoders)
SC.HiPEr, SC.EndAt, SC.SSI
(linear encoders
At power-up Pr 3.48 is initially zero, but is set to one when the drive encoder and any encoders connected to any Solutions Modules have been
initialized. The drive cannot be enabled until this parameter is one.
Encoder initialization will occur as follows:
• At drive power-up
• When requested by the user via Pr 3.47
• When trips PS.24V, Enc1 to Enc8, or Enc11 to Enc17 trips are reset
• The encoder number of lines per revolution (Pr 3.34) or the number of motor poles (Pr 5.11 and Pr 21.11) are changed (software version
V01.08.00 and later).
Initialization causes an encoder with communications to be re-initialized and auto-configuration to be performed if selected. After initialization
Ab.SErVO, Fd.SErVO and Fr.SErVO encoders will use the UVW commutations signals to give position feedback for the first 120° (electrical) of
rotation when the motor is restarted.
Digitax ST User Guide
Issue: 3
Electrical Getting Basic
installation started parameters
SSI (10) for a SSI communications only encoder
Pr 3.38
SC.SSI (11) for a Sincos encoder with SSI
5V (0), 8V (1) or 15V (2)
Pr 3.36
NOTE
If Ab encoder voltage is greater than 5V, then the termination resistors must be disabled Pr 3.39 to 0
Pr 3.34 Set to the number of sine waves per revolution of the encoder.
Pr 3.41 OFF (0) for gray code, or On (1) for binary format SSI encoders
Pr 3.33 Set to the number of turn bits for the encoder (this is usually 12bits for a SSI encoder)
Pr 3.35 Set to the single turn comms resolution for the encoder (this is usually 13bits for a SSI encoder)
Pr 3.37 100 = 100k, 200 = 200k, 300 = 300k, 500 = 500k, 1000 = 1M, 1500 = 1.5M, or 2000 = 2M
0 = Error detection disabled
1 = Wire break detection on Sin and Cos inputs (SC.SSI only)
2 = Phase error detection (SC.SSI only)
3 = Wire break detection and phase error detection (SC.SSI only)
Pr 3.40
4 = SSI power supply bit monitor
5 = SSI power supply bit monitor and wire break detection (SC.SSI only)
6 = SSI power supply bit monitor and phase error detection (SC.SSI only)
7 = SSI power supply bit monitor, wire break detection and phase error detection (SC.SSI only)
Pr 3.38 Ab.servo
Pr 3.36 5V (0), 8V (1) or 15V (2)
Pr 3.34 Set to zero
Pr 3.40 Set to zero to disable wire break detection
The drive uses the value in Pr 3.34.
If Pr 3.34 ≤1, the drive uses the value of 1.
If 1< Pr 3.34 <32,768, the drive uses the value in Pr 3.34 rounded down to nearest value that is a power of 2.
If Pr 3.34 ≥32,768, the drive uses the value of 32,768.
The drive uses the value in Pr 3.34.
www.controltechniques.com
Running the SMARTCARD
Optimization
motor Operation
Equivalent Lines per revolution used by the drive
Onboard Advanced Technical
Diagnostics
PLC parameters Data
UL listing
information
65