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Programming 6-39MN792
Speed Loop
Speed loop selects the speed feedback source and tunes the speed loop PI to produce a current demand. The
parameters are set in several menus, some parameters can be set in multiple menus. Speed FBK Select
determines the source of the speed feedback signal. The default, Arm Volts FBK, uses internal circuitry to derive
speed feedback. The other selections require external devices to provide the feedback signal. Speed Demand is
summed algebraically with Speed Feedback to yield Speed Error. When the drive is enabled, Speed Error is
controlled by the PI loop. Proportional and integral values are set in the Advanced::Adaption block. The resulting
current demand signal is sent to the Current Loop block and to the Advanced::Zero SPD. Quench block.
1 SETUP PARAMETERS
2 SPEED LOOP
Speed PROP Gain
Speed INT Time
INT Defeat
Encoder Sign
Speed FBK Select
Speed FBK Filter
1 CONFIGURE DRIVE
Speed FBK Select
Encoder Sign
Speed INT Time
Speed PROP Gain
1 SETUP PARAMETERS
2 SPEED LOOP
3 SETPOINTS
Setpoint 1
Sign 2 (A3)
Ratio 2 (A3)
Setpoint 3
Setpoint 4
MAX Demand
MIN Demand
1 SETUP PARAMETERS
2 SPEED LOOP
3 ADVANCED
I Gain in Ramp
POS Loop P Gain
1 SETUP PARAMETERS
2 SPEED LOOP
3 ADVANCED
4 ADAPTION
Mode
Speed BRK1 (Low)
Speed BRK2 (High)
PROP Gain
1 SETUP PARAMETERS
2 SPEED LOOP
3 ADVANCED
4 ZERO SPD QUENCH
Zero SPD Level
Zero IAD Level
Speed Loop
[356]
To Current
Loop
[270] SPD BRK2 (High) 5.00%
Tag# Parameter Factory Setting
[269] SPD BRK2 (Low) 1.00%
Adaption
[268] Mode 0
[271] PROP Gain 5.00
[272] INT Time Constant 0.500 Sec
Zero SPD Quench
Tag# Parameter Factory Setting
[284] Zero SPD Level 0.50%
[285] Zero IAD Level 1.50%
Advanced
P
I
[89] Speed Demand
+
PI
Speed Feedback Select
[47] Speed FBK Select
[49] Encoder Sign (+/-)
Encoder
Analog Tach
Armature Volts
+ / -
Zero SPD Offset
From Calibration Board
[64]
Diagnostic
Connection
[297]
Diagnostic
Connection
[62]
Diagnostic
Connection
[207]
Diagnostic
Connection
Unfiltered Speed Error
Unfiltered Speed Feedback
-
+
-
Note: Encoder analog feedback selection uses analog Tach feedback for the proportional
term of the speed loop PI and encoder feedback for the Integral term. This feedback
selection requires that the motor have an analog Tach/Encoder installed. This
selection cannot be used with the switchable Tachogenerator board is installed.
[7] Ratio 2 (A3) 1.0000 Sec
Tag# Parameter Factory Setting
Analog
Input 2
A3
[9] Sign 2 (A3) Positive
[290] Setpoint 2 0.00%
[41] Setpoint 4 1.0000 Sec
[289] Setpoint 1 SPT Sum Out
[291] Setpoint 3 Ramp Out
To IDMD
Isolate Switch
(To Current Loop)
+ / -
+
[63]
Diagnostic
Connection
Speed Setpoint
+
+
+
[119]
I DMD Isolate (from Current Loop)
[357] MAX Demand 105.00%
[358] MIN Demand -105.00%
[13] INT Time Constant 0.500 Sec
[14] PROP Gain 10.00
Armature SCR
Firing Quench
Current Demand
[202] INT Defeat Off