Table 4-1 Alarm Conditions

Alarm Condition

Control Parameter (C)

(C) Description

Monitor Variable (M) Which Displays Alarm Status

No Alarm

N/A

N/A

M-52

Low Alarm
(L0-Alarm)

C-12

The LO-ALARM is displayed in motor RPMs and is measured at motor shaft. This parameter establishes the point at which the LO-ALARM output is turned on (and a corresponding message is displayed on the LCD).

M-52

High Alarm
(Hi-Alarm)

C-13

The HI-ALARM is displayed in motor RPMs and is measured at motor shaft. This parameter establishes the point at which the HI-ALARM output is turned on (and a corresponding message is displayed on the LCD).

M-52

Deviation
Alarm 1
(Dev-Alarm-1)

C-14

The Ramped Error Alarm, aka Deviation Alarm 1 is displayed in RPMs and is measured at the motor shaft. This parameter establishes the error band (defined as the ramped motor speed minus the actual motor speed) at which the DEV-ALARM- 1 output is turned on (and a corresponding message is displayed on the LCD). If the difference between the actual motor speed and the ramped desired motor speed is greater than or equal to C-14, the alarm is turned on.

M-52

Deviation
Alarm 2
(Dev-Alarm-2)

C-15

The Scaled Error Alarm, aka Deviation Alarm 2 is displayed in RPMs and is measured at the motor shaft. This parameter establishes the error band (defined as the final motor speed minus the actual motor speed) at which the DEV-ALARM- 2 output is turned on (and a corresponding message is displayed on the LCD). If the difference between the actual motor speed and the final desired motor speed is greater than or equal to C-15, the alarm is turned on.

M-52

Display Test

N/A

The user can activate a display test (all LED segments turned on) by selecting "M-97", then pressing the "4" key and the ENTER button simultaneously.

M-52
M-97

No Current

N/A

NO CURRENT monitors the current transformer the within ZeDRIVE 2000. NO CURRENT means an open motor armature circuit.

M-52

Armature Fault

N/A

ARMATURE FAULT looks for high armature current at the current transformer located within the ZeDRIVE™ 2000. The ARMATURE FAULT provides motor short circuit protection.

M-52

Field Fault

N/A

FIELD FAULT looks for high field current at the current transformer located within the ZeDRIVE 2000. The FIELD FAULT provides motor short circuit protection.

M-52

No Feedback

N/A

NO FEEDBACK monitors (M-43) (Feedback Frequency Input). M-43 is displayed in Hertz (pulses per second). It is based on the number of pulses received in the last 1/2 second. A NO FEEDBACK alarm will occur if no feedback is received in the length of time = the value of C16.

Note: No feedback may mean no motor rotation or broken feedback connection, or too large a sensor to pickup wheel gap. If C-16 is set to a value less than 0.5 sec., a "NO FEEDBACK" alarm will most likely occur.

M-52

Table 4-2 Operating Conditions

Operating Condition

Control Parameter (CP)

(CP) Description

Monitor Variable (M) Which Displays Alarm Status

Low Limit
(or minimum limit)

C-10

The LOW LIMIT is displayed in motor RPMs and is measured at motor shaft. This parameter establishes the minimum level of motor RPM during operation. It is allowable to program a setpoint which is below this value, however the controller will enforce this minimum speed (measured at the motor shaft).

M-52

High Limit
(or maximum limit)

C-11

The HIGH LIMIT is displayed in motor RPMs and is measured at motor shaft. This parameter establishes the maximum level of motor RPM during operation. It is allowable to program a setpoint which is above this value, however the controller will enforce this maximum speed (measured at the motor shaft).

M-52

Erratic Behavior (system)

C-61, C-06

If the drive system appears to be exhibiting erratic behavior, test the drive in the "Direct Mode" (C-61). In the Direct Mode, the drive will cause the motor to run at a constant speed, ignoring feedback and the PID loop. Set the drive setpoint at C-06 in percent of output. If the erratic behavior persists, investigate a cause external to the drive, such as a problem with the magnetic pickup feedback loop or pump/reducer misalignment. If the system performance is smoother, return the drive to "Master Mode" and tune the PID loop.

M-40

Tune PID Loop

C-65, C-66
C-67, C-69

To tune the PID loop, set C-66 and C-67 to zero. If the feedback is not highly variable, decrease C-65 until it is, then increase slightly. If the feedback is highly variable, increase C-65 until it stops. If C-65 is highly variable throughout the range, decrease C-68 slightly and try again. When C-65 is stable, set C-66 to "500". If the feedback is averaging above setpoint, increase C-66 until it averages the setpoint. Set C-67 to "9000". Decrease C-67 until rapid changes in set-point are followed without excess variability. If necessary, decrease C-69. The following setup is optimum for excessive variability: C-65=500; C-66=300;C-67=200; C-69=0.

M-40

Current Limit

C-94

The CURRENT LIMIT is displayed in Amps and is measured at the armature terminal. This parameter sets the drive cur-rent limit. The maximum value is derived from the HP rating (C-101) and the armature voltage (C-92) in accordance with the following list:

M-52

HP

90V

180V

240V

1/4

4.0A

2.0A

1.6A

1/2

6.8A

3.4A

2.7A

3/4

9.6A

4.8A

3.8A

1

12.2A

6.1A

4.7A

2

N/A

12.0A

9.0A

3

N/A

18.0A

13.5A

5

N/A

30.0A

22.5A