Menu 3
Parameter
structure
Keypad and
display
Parameter x.00
Parameter description
format
Advanced parameter
descriptions
Serial comms
protocol
Performance
54 Mentor MP Advanced User Guide
www.controltechniques.com Issue Number: 4
At power-up Pr 3.48 is initially zero, but is set to one when the drive encoder and any encoders connected to position category modules have been
initialized. The drive cannot be enabled until this parameter is one.
If any trips occur that could indicate that the encoder system is no longer initialized correctly (i.e. Enc2), or the encoder power supplies are overloaded
(i.e. Enc1), Pr 3.48 is set to zero and the drive cannot be enabled until the encoder is re-initialized. It is likely that the failure of either of these supplies
will cause one of the other encoder trips and it should be noted that Enc1 or PS.24V trips can override Enc2 trips so that the power supply overload is
not mistaken for an encoder error.
When this parameter is set to one, additional information for the motor object can be transferred from Pr 18.11 to Pr 18.17 as shown below:
If Pr 3.50 is set to one Pr 3.28, Pr 3.29 are not updated. If this parameter is set to zero these parameters are updated normally.
Defines the rating of the tachometer installed to the motor. This parameter should be set slightly above or below the nominal value if the user wishes
to trim out the tolerance build ups in the feedback electronics. Parameter units are DC in DC mode and rms AC in AC mode.
Provided the tachometer voltage rating parameter for the tachometer is correct this parameter shows the tachometer speed in rpm.
3.48 Position feedback initialised
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Update rate Background write
3.49 Full motor object electronic nameplate transfer
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate Read on reset
User parameter Motor object parameter
Pr 18.11 Motor object version number
Pr 18.12 Motor type (MSW)
Pr 18.13 Motor type (LSW)
Pr 18.14 Motor manufacturer
Pr 18.15 Motor serial number (MSW)
Pr 18.16 Motor serial number
Pr 18.17 Motor serial number (LSW)
3.50 Position feedback lock
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate 4 ms read
3.51
{Fb02, 0.72}
Tachometer voltage rating
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
2 111
Range 0 to 300.00 V/1000 rpm
Default Eur: 60.00, USA: 50.00
Update rate Background read
3.52
{Fb04, 0.74}
Tachometer speed feedback
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 111 1 1
Range ±SPEED_MAX rpm
Update rate 1 ms write