Diagnostics – Lenze E94P PositionServo with MVOB User Manual

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Diagnostics

Problem

Ready LED is on but motor does not run.

Suggested Solution

If in Torque or Velocity mode:
Reference voltage input signal is not applied.

Reference signal is not connected to the PositionServo input properly; connections
are open.
In MotionView program check <Parameters> <Reference> set to <External>

For Velocity mode only:

In MotionView check <Parameters> <Compensation><Velocity loop filter> P-gain
must be set to value more then 0 in order to run. Without load motor will run with
P-gain set as low as 20 but under load might not. If P-gain is set to 0 motor will not
run at all.

In Position mode with master encoder motion source (no program)

Reference voltage input signal source is not properly selected.
In MotionView program check <Parameters> <Reference> set to <External>

In Position mode using indexing program

Variables ACCEL, DECEL,MAXV, UNITS are not set or set to 0. Before attempting the
move set values of motion parameters ACCEL, DECEL,MAXV, UNITS

Problem

In velocity mode, the motor runs away.

Possible Cause

• Hall sensors or encoder mis-wired.
• PositionServo not programmed for motor connected.

Suggested Solution

• Check Hall sensor and encoder connections.
• Check that the proper motor is selected.

Problem

Cannot connect second drive when sequentially connecting 2 Ethernet-based Drives

Possible Cause

If when trying to sequentially commission several Ethernet-based drives with the same
PC, MotionView discovers the IP address, but then reports that the drive cannot be
connected. Due to the fact that the PS drives are shipped with the same factory default
IP address.

Suggested Solution

After the first drive is connected, open the Command window on your PC and run the
command “arp -d” just before connecting MotionView to another drive.

ARP is the Address Resolution Protocol. Each PositionServo drive has two addresses,
one MAC address and one IP address. ARP links these two addresses together. Each
PositionServo drive has the same factory default IP address, but a different MAC
address. After connecting the first drive, the Ethernet hub will cache its IP and MAC
address for about 2 minutes. When another drive with the same IP address and different
MAC address is connected to the network, ARP will observe the mismatching between
the IP address and MAC address.

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