Menu 21: Second Motor Parameters - Control Techniques Digitax ST Advanced User's Manual

Parameter
Menu 21
structure
5.22

Menu 21: Second motor parameters

The following parameters are used instead of the normal motor set-up parameters when Pr 11.45 = 1.
When the alternative parameter set is being used by the drive the decimal point after the right hand digit in the 1st row is on.
For more information about a particular parameter, see the equivalent normal motor map 1 parameter.
21.01 Maximum reference clamp
Bit SP
Coding
Range SPEED_LIMIT_MAX rpm
Default 3,000.0
Normal
Pr 1.06
parameter
Update rate Background read
21.02 Minimum reference clamp
Bit SP
Coding
Range ±SPEED_LIMIT_MAX rpm
Default 0.0
Normal
Pr 1.07
parameter
Update rate Background read
* The range shown for Pr 1.07 shows the range used for scaling purposes (i.e. for routing to an analog output etc.). Further range restrictions are
applied as given below.
01.08
(Neg min ref enable) (Bipolar mode enable)
0
0
1
1
21.03 Reference selector
Bit SP
Coding
Range 0 to 5
Default 0 (A1.A2)
Normal
Pr 1.14
parameter
Update rate 4ms read
Unlike the motor 1 (Pr 1.14) this parameter is not used for T28 and T29 digital input auto-selection (see Pr 8.39 on page 115).
Pr 21.03 defines how the value of Pr 1.49 is derived as follows:
Value of Pr 21.03
0
1
2
3
4
5
*The bit Pr 1.41 to Pr 1.44 can be controlled to force the value of Pr 1.49:
all bits equal to zero gives 1,
Pr 1.41 = 1 then Pr 1.49 = 2
Pr 1.42 = 1 then Pr 1.49 = 3
Pr 1.43 = 1 then Pr 1.49 = 4
Pr 1.44 = 1 then Pr 1.49 = 5
202
Keypad and
Parameter x.00
display
FI DE Txt VM DP ND
1 1
FI DE Txt VM DP ND
1 1
01.10
0
1
0 -SPEED_LIMIT_MAX to 0 rpm
1 -SPEED_LIMIT_MAX to 0 rpm
FI DE Txt VM DP ND
1
Display String
A1.A2
A1.Pr
A2.Pr
Pr
Pad
Prc
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Parameter Advanced parameter
description format descriptions
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1 1
Range
0 to 21.01
0
RA NC NV PT US RW BU
1 1
Pr 1.49
*Selected by terminal input
1
2
3
4
5
Serial comms Electronic
protocol nameplate
PS
1
PS
PS
1
Digitax ST Advanced User Guide
Issue Number: 1
Performance