Control Techniques Digitax ST Advanced User's Manual page 103

Parameter Keypad and
Parameter x.00
structure display
Parameter value Parameter string
0
1
2
3
4
5
6
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.
7.12 T7 analog input 2 scaling
Bit SP
Coding
Range 0.000 to 4.000
Default 1.000
Update rate Background read
7.13 T7 analog input 2 invert
Bit SP
Coding
1
Default 0
Update rate Background read
7.14 T7 analog input 2 destination
Bit SP
Coding
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
Bit SP
Coding
Range 0 to 9
Default 8
Update rate Background read
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
0
1
2 4-20.tr
3 20-4.tr
4
5
6
7
8
9 th.diSp
Digitax ST Advanced User Guide
Issue Number: 1
Parameter
description format
0-20
20-0
4-20.tr 4 -20mA with trip on loss
20-4.tr 20 - 4mA with trip on loss
4-20 4 - 20mA with no trip on loss
20-4 20 - 4mA with no trip on loss
VOLt
FI DE Txt VM DP ND
3
FI DE Txt VM DP ND
FI DE Txt VM DP ND
1 2
FI DE Txt VM DP ND
1
0-20
20-0
4 -20mA with trip on loss
20 - 4mA with trip on loss
4-20 4 - 20mA with no trip on loss
20-4 20 - 4mA with no trip on loss
VOLt
th.SC Thermistor with short circuit detection
th Thermistor without short circuit detection
Thermistor display only with no trip
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Advanced parameter Serial comms
descriptions protocol
Mode
0 - 20mA
20 - 0mA
Voltage mode
RA NC NV PT US RW BU
1
RA NC NV PT US RW BU
1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1
Mode
0 - 20mA
20 - 0mA
Voltage mode
Electronic
Performance
nameplate
Comments
Trip if I < 3mA, Pr 7.02 = 0.0% if I < 4mA
Trip if I < 3mA, Pr 7.02 = 100.0% if I < 4mA
Pr 7.02 = 0.0% if I < 4mA
Pr 7.02 = 100.0% if I < 4mA
PS
1 1
PS
1
PS
1 1
PS
1 1
Comments
Trip if I < 3mA, Pr 7.03 = 0.0% if I < 4mA
Trip if I < 3mA, Pr 7.03 = 100.0% if I < 4mA
Pr 7.03 = 0.0% if I < 4mA
Pr 7.03 = 100.0% if I < 4mA
TH trip if R > 3k3
TH reset if R < 1k8
THS trip if R < 50R
TH trip if R > 3k3
TH reset if R < 1k8
Menu 7
103