Emerson Digitax ST - Menu 4: Torque and Current Control Logic

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Digitax ST User Guide 127
Issue Number: 5
12.4 Menu 4: Torque and current control
Figure 12-4 Menu 4 logic diagram
*For more information, refer to section 12.22.4 Torque modes on page 168.
4.04
Current
demand
Filter
+
_
4.08
4.09
10.0910.08
4.13
4.14
Current loop
P gain
Current loop
I gain
Current controller
4.18
11.32
5.07
4.05
4.06
Motoring
Regenerating
Current limits
4.07
Symmetrical
Drive rated
continuous
current
Motor rated
current
Over-riding
current limit
3.05
Zero
speed
threshold
Torque reference
offset
Torque
reference*
Speed
over-ride
level
Coiler/uncoiler
speed
over-ride
level
+
At 100%
load
indicator
Current limit
active
indicator
Motor active
current
4.02
10.174.19
Motor
overload
accumulator
Motor current
overload alarm
indicator
10.39
Braking energy
overload
indicator
Torque mode
selector
4.11
4.10
Torque
reference
offset
enable
+
0
1
2
3
4
+
+
4.03
Torque
demand
0.XX
0.XX
Key
Read-write (RW)
parameter
Read-only (RO)
parameter
Input
terminals
Output
terminals
X
X
X
X
Percentage
load
4.20
The parameters are all shown at their default settings
4.23
Current
demand
filter 1
4.12
Current
demand
filter 2
4.15 4.16
Motor thermal
time constant
Motor protection
mode
4.24
4.25
Low speed
protection mode
Overload detection
User current
max scaling
Speed controller
gain select
3.16
1.03
Pre-
ramp
reference
3.04
+
3.01
3.02
Speed
feedback
Final
speed
demand
_
Speed loop
output
+
+
4.22
2.38
Inertia
compensation
enable
+
Inertia
compensation
torque