Control Techniques Digitax ST - Page 28

Menu 1
Parameter
structure
Keypad and
display
Parameter x.00
Parameter
description format
Advanced parameter
descriptions
Serial comms
protocol
Electronic
nameplate
Performance
28 Digitax ST Advanced User Guide
www.controltechniques.com Issue Number: 1
Pr 1.15 defines how the value of Pr 1.50 is derived as follows:
*Pr 1.45 to Pr 1.47 can be controlled by digital inputs to define the value of Pr 1.50 as follows:
**The presets are selected automatically in turn. Pr 1.16 defines the time between each change.
Pr 1.49 and Pr 1.50 then define the reference as follows:
This parameter defines the time between preset reference changes when Pr 1.15 is set to 9. If Pr 1.48 is set to 1 then the preset counter and timer are
reset and preset 1 will be selected.
1.15 Preset selector
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range 0 to 9
Default 0
Update rate 4ms read
Value of Pr 1.15 Pr 1.50
0 Selected by terminal input*
11
22
33
44
55
66
77
88
9 Selected by timer**
Pr 1.47 Pr 1.46 Pr 1.45 Pr 1.50
00 0 1
00 1 2
01 0 3
01 1 4
10 0 5
10 1 6
11 0 7
11 1 8
Pr 1.49 Pr 1.50 Reference
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)
1.16 Preset reference selector timer
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Range 0 to 400.0 s
Default 10.0
Update rate Background read