Parameter
structure
Keypad and
display
Parameter x.00
Parameter description
format
Advanced parameter
descriptions
Serial comms
protocol
Performance
Menu 3
Mentor MP Advanced User Guide 51
Issue Number: 4 www.controltechniques.com
When Ab, Fd, Fr are used the equivalent number of encoder lines per revolution must be setup correctly in Pr 3.34 to give the correct speed and
position feedback. This is particularly important if the encoder is selected for speed feedback with Pr 3.26 {Fb01, 0.71}. The equivalent number of
encoder lines per revolution (ELPR) is defined as follows.:
The incremental (A/B) signal frequency should not exceed 500 kHz. If Pr 3.34 {Fb05, 0.75} is changed the encoder is re-initialized.
Pr 3.35 defines the marker mode. If this parameter is zero the marker system operates in a conventional manner, but if this parameter is non-zero the
marker causes a full position reset.
The encoder supply voltage present on the drive encoder connector is defined by this parameter as 0 (5 V), 1 (8 V), 2 (15 V) or 3 (24 V)
The following encoders can be connected to the drive encoder port.
0, Ab: Quadrature incremental encoder, with or without marker pulse
1, Fd: Incremental encoder with frequency and direction outputs, with or without marker pulse
2, Fr: Incremental encoder with forward and reverse outputs, with or without marker pulse
3.34
{Fb05, 0.75}
Drive encoder lines per revolution
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range 1 to 50,000
Default 1,024
Update rate Background read (Only has any effect when the drive is disabled)
Position feedback device ELPR
Ab number of lines per revolution
Fd, Fr number of lines per revolution / 2
3.35
Drive encoder marker mode
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range 0 to 1
Default 0
Update rate Background read (Only has any effect when the drive is disabled)
3.36
{Fb06, 0.76}
Drive encoder supply voltage
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 3
Default 0
Update rate Background read
3.38
{Fb07, 0.77}
Drive encoder type
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111
Range 0 to 2
Default 0
Update rate Background read (Only has any effect when the drive is disabled)