Parker Hannifin
Chapter 6 Troubleshooting - 75 -
Important! — Further troubleshooting steps can change the drive/controller
configuration. Upload the current configuration file and save it as a backup
before proceeding.
Smart Encoders
This troubleshooting procedure assumes a terminal emulator connection is
established with the Aries Controller.
If the drive/controller does not initialize correctly when connected to a Smart
Encoder (Parker motors only), check the following:
1. Verify the motor phases are wired correctly. Incorrectly wired motor
phases can produce any combination of the following symptoms in the
motor; runs backwards, produces low torque, or gets warm.
2. Check that the feedback cables are wired correctly.
3. Apply power to the drive/controller.
a. Send the SFB command. It should report 4. If the response is not
<*>4, then check the feedback cable (if using a non-Parker cable,
check that it is correctly wired). If the cable is correctly wired and
connected, the problem might be the encoder.
b. Send the THALL command. It should report a number in the range
of 1–6, which indicates the phase wires are connected correctly. If
the response is Ø or 7, a fault exists, check the motor phase wiring.
c. Send the TPE command and turn the motor shaft. Verify the
encoder is counting in the correct direction. Turning the shaft
clockwise results in positive encoder counts when Bit 8455 is set to
zero (Ø). If not, check the encoder feedback wires and reset the
drive.
Hall Sensors
The troubleshooting procedures in this section assume that a terminal
emulator connection is established with the Aries Controller. The procedures
assist you in resolving a Hall fault (ERROR bit E37-Bad Hall State). Several
problems can cause a Hall fault; the following checklist will help identify these
problems.
Troubleshooting Checklist
1. Does ?THALL report either 0 or 7?
If yes, see Problem 1 or Problem 2, below.
2. Doe
s ?THALL change if you move the motor by hand?
If no, see Problem 2, below.
3. Doe
s ?THALL have six distinct Hall states from 1 to 6? (No numerical
order is necessary.)
If no, see Problem 2, below.
4. Doe
s ?THALL report the six distinct Hall states n times as the rotor turns
one revolution, where n is equal to the number of pole-pairs (DPOLE)?
(Linear motors: n = pitch)
If no, see Problem 2 or Problem 3, below.
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