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Menus 15 to 17
SM-Uni Enc Pl
Unidrive SP Advanced User Guide 245
Issue Number: 7 www.controltechniques.com
At power-up Pr x.45 is initially zero, but is set to one when the encoder connected to position module has been initialised. The drive cannot be
enabled until this parameter is one.
If the encoder power-supply is lost, or the encoder type parameter is changed for an encoder connected to a Solutions Module, and the encoder type
is SC, SC.Hiper, SC.EnDat or EnDat the encoder will no longer be initialised. When an encoder is no longer initialised Pr x.45 is reset to zero and the
drive cannot be enabled. The encoder may be re-initialised, provided the drive is not active, by setting Pr 3.47 to one. Pr 3.47 is automatically reset to
zero when the initialisation is complete.
The equivalent line per revolution (Pr x.10) is divided by the value in Pr x.46. This can be used when an encoder is used with a linear motor where the
number of counts or sine waves per pole is not an integer.
For example, 128.123 lines per revolution would be set as 128123 in Pr x.10 and 1000 in Pr x.46 giving:
128123 / 1000 = 128.123.
If the value is less than 1, the value used will be 1.
Used by the simulation module.
Used by the simulation module.
x.45 Position feedback initialised
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Update rate Background write
x.46 Line per revolution divider
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range
Open-loop, Closed-loop vector, Servo,
Regen
0 to 1,024
Default
Open-loop. Closed-loop vector, Servo,
Regen
1
Update rate Background read
x.47 SSI output turns
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range
Open-loop, Closed-loop vector, Servo,
Regen
0 to 16
Default
Open-loop, Closed-loop vector, Servo,
Regen
16
Update rate Background read
x.48 SSI output comms resolution
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range
Open-loop, Closed-loop vector, Servo,
Regen
0 to 32 bits
Default
Open-loop, Closed-loop vector, Servo,
Regen
0
Update rate Background read
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