Installing the Drive 3-17
DC590+ DRV Series DC Digital Drive
Asymmetric Current Limits (A5, A6, B3, B4, C6)
For asymmetric current limits, connect terminal C6 (CURRENT CLAMP SELECT) to C9 (24VDC), which sets parameter BIPOLAR CLAMPS to
TRUE. This lets terminal A5 control the negative current clamp and terminal A6 control the positive current clamp. Connect terminal A5 (ANALOG
INPUT 4) to terminal B4 (-10 VDC REFERENCE) and connect terminal A6 (ANALOG INPUT 5) to terminal B3 (+10 VDC REFERENCE). This
sets the drive's positive and negative current limit clamps to +100% and -100% respectively for forward and reverse motor operation.
To control the positive current limit externally, connect a 10k ohm potentiometer between terminal B3 (+10 VDC REFERENCE) and terminal B1 (0
VDC). Connect the wiper to terminal A6. You can then adjust the positive current clamp from 0 to 100%.
To control the negative current limit externally, connect a 10k ohm potentiometer between terminal B4 (-10 VDC REFERENCE) and terminal B1 (0
VDC). Connect the wiper to terminal A5. You can then adjust the negative current clamp from 0 to -100%.
For greater adjustment range, you can adjust the scaling factor for both current limits up to 200% by setting SETUP PARAMETERS::CURRENT
LOOP:: CUR.LIMIT/SCALER.
Speed Demand (A2, A3, A4, C8)
For normal operation, connect the speed demand signal to terminal A4 (RAMP SETPOINT). This input is scaled so that +10 VDC
input equals maximum forward speed demand (+100%), and –10 VDC input equals maximum reverse speed demand (–100%).
Connect the ends of an external 10kohm potentiometer to terminal B3 (+10 VDC REFERENCE) and terminal B4 (–10 VDC
REFERENCE) and the wiper to terminal A4. For non-reversing applications, the speed demand needs only to operate between 0 and
+10 VDC. Connect the high, or clockwise, end of the potentiometer to B3 and the low, or counter clockwise, end to the 0 VDC
terminal, A1 (SIGNAL GROUND).
Terminal A2 (SPEED SETPOINT NO. 1) is an additional, non-ramped speed demand input which sums with the drive's other speed inputs. Connect
your speed demand to this terminal for non-ramped speed control. This is often used a speed trim signal.
Terminal A3 (SPEED SETPOINT NO. 2 or CURRENT DEMAND) is a hardwired, high-speed input, which functions either as a non-ramped speed or
current demand. The state of control terminal C8 (I DMD. ISOLATE) determines the operating mode of the input. When tied to +24 VDC (terminal
C9), A3 is a direct current demand input to the drive's current loop. When terminal C8 is left open-circuited, A3 is a non-ramped, speed demand input
and sums with the other drive speed loop inputs.
Start/Stop Input (C3)
Connect terminal C3 (RUN) to C9 (+24V) through a normally open contact to provide normal start/stop control. When the contact is open, the drive
will attempt to perform a controlled stop. When it is closed, the drive will start.
Jog Input (C4)
Terminal C4 (JOG) is connected through a normally open contact to terminal C9 for jog applications. Interlock the jog relay contact with the run relay
coils as shown in the relevant Connection Diagram at the end of this chapter.
Armature Current Feedback Output (A9)
You can connect a meter to terminal A9 (ARMATURE CURRENT) to monitor the motor DC armature current. The output is hardwired and not
software configurable. Refer to Appendix E: "Terminal Information – Control Board" for the terminal's output rating and signal
-100
+100
0
0
+100
START/
RUN
ANIN 3
+10V REF
-10V REF
0V
ANIN 5
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