Control Techniques Digitax ST - Page 103

Parameter
structure
Keypad and
display
Parameter x.00
Parameter
description format
Advanced parameter
descriptions
Serial comms
protocol
Electronic
nameplate
Performance
Menu 7
Digitax ST Advanced User Guide 103
Issue Number: 1 www.controltechniques.com
In modes 2 and 4 the destination parameter is at a value equivalent to 0.0% when the input current is less than 4mA. In modes 3 and 5 the destination
parameter is at a value equivalent to 100.0% when the input current is less than 4mA.
The following modes are available for the analog input 3. In modes 2 and 3 a current loop loss trip is generated if the input current falls below 3mA.
Parameter value Parameter string Mode Comments
0 0-20 0 - 20mA
1 20-0 20 - 0mA
2 4-20.tr 4 -20mA with trip on loss Trip if I < 3mA, Pr 7.02 = 0.0% if I < 4mA
3 20-4.tr 20 - 4mA with trip on loss Trip if I < 3mA, Pr 7.02 = 100.0% if I < 4mA
4 4-20 4 - 20mA with no trip on loss Pr 7.02 = 0.0% if I < 4mA
5 20-4 20 - 4mA with no trip on loss Pr 7.02 = 100.0% if I < 4mA
6 VOLt Voltage mode
7.12 T7 analog input 2 scaling
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
3 111
Range 0.000 to 4.000
Default 1.000
Update rate Background read
7.13 T7 analog input 2 invert
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default 0
Update rate Background read
7.14 T7 analog input 2 destination
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 2 1111
Range Pr 0.00 to Pr 21.51
Default Pr 1.37
Update rate Read on drive reset
7.15 T8 analog input 3 mode
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
Range 0 to 9
Default 8
Update rate Background read
Parameter value Parameter string Mode Comments
0 0-20 0 - 20mA
1 20-0 20 - 0mA
2 4-20.tr 4 -20mA with trip on loss Trip if I < 3mA, Pr 7.03 = 0.0% if I < 4mA
3 20-4.tr 20 - 4mA with trip on loss Trip if I < 3mA, Pr 7.03 = 100.0% if I < 4mA
4 4-20 4 - 20mA with no trip on loss Pr 7.03 = 0.0% if I < 4mA
5 20-4 20 - 4mA with no trip on loss Pr 7.03 = 100.0% if I < 4mA
6 VOLt Voltage mode
7 th.SC Thermistor with short circuit detection
TH trip if R > 3k3
TH reset if R < 1k8
THS trip if R < 50R
8 th Thermistor without short circuit detection
TH trip if R > 3k3
TH reset if R < 1k8
9 th.diSp Thermistor display only with no trip