Control Techniques Digitax ST Advanced User's Manual page 27

Parameter Keypad and
structure display
1.10 Bipolar reference enable
Bit SP
Coding
1
Default 0
Update rate 4ms read
See Pr 1.08 on page 25.
1.11 Reference enabled indicator
1.12 Reverse selected indicator
1.13 Jog selected indicator
Bit SP
Coding
1
Update rate 4ms read
These parameters are controlled by the drive sequencer as defined in Menu 6. They select the appropriate reference as commanded by the drive
logic. Pr 1.11 will be active if a run command is given, the drive is enabled and the drive is ok. This parameter can be used as an interlock in a
Onboard PLC or SM-Applications program to show that the drive is able to respond to a speed or torque demand.
1.14 Reference selector
Bit SP
Coding
Range 0 to 5
Default 0 (A1.A2)
Second motor
Pr 21.03
parameter
Update rate 4ms read
Pr 1.14 defines how the value of Pr 1.49 is derived as follows:
Value of Pr 1.14
0 A1.A2 (Analog ref 1. Analog ref 2)
1 A1.Pr (Analog ref 1. Preset speeds)
2 A2.Pr (Analog ref 2. Preset speeds)
3 Pr (Preset speeds)
4 Pad (Keypad reference)
5 Prc (Precision reference)
*Pr 1.41 to Pr 1.44 can be controlled by digital inputs 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
The bit parameters with lower numbers have priority over those with higher numbers.
Pr 1.49 and Pr 1.50 then define the reference as follows:
Pr 1.49 Pr 1.50
1 1 Analog reference 1 (Pr 1.36)
1 >1 Preset defined by Pr 1.50 (Pr 1.21 to Pr 1.28)
2 1 Analog reference 2 (Pr 1.37)
2 >1 Preset defined by Pr 1.50 (Pr 1.21 to Pr 1.28)
3 x** Preset defined by Pr 1.50 (Pr 1.21 to Pr 1.28)
4 x** Keypad reference (Pr 1.17)
5 x** Precision reference (Pr 1.18 and Pr 1.19)
** x = any value
Keypad reference
If Keypad reference is selected the drive sequencer is controlled directly by the keypad keys and the keypad reference parameter (Pr 1.17) is
selected. The sequencing bits, Pr 6.30 to Pr 6.34, have no effect and jog is disabled.
Digitax ST Advanced User Guide
Issue Number: 1
Parameter
Parameter x.00
description format
FI DE Txt VM DP ND
FI DE Txt VM DP ND
FI DE Txt VM DP ND
1
Display String
Reference
www.controltechniques.com
Advanced parameter Serial comms
descriptions protocol
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
Pr 1.49
*Selected by terminal input
1
2
3
4
5
Electronic
Performance
nameplate
PS
PS
PS
1
Menu 1
27