User Manual

Publication 1398-5.0 – October 1998
Maintenance and Troubleshooting 11-17
Testing Encoder Inputs
The following test verifies both reception and transmission of the line
count from an encoder by the drive.
The tests require:
● a PC running ULTRA Master, and
● a motor encoder.
To test encoder inputs:
1. Disable the drive by opening the connections between the
ENABLE input and +24VDC.
2. Choose the
Drive Parameters command icon from
ULTRA Master.
3. Choose
M
aster Encoder as the Command Source.
4. Choose the
D
rive Set Up command icon from ULTRA Master.
5. Choose
Divide by 1 as the Master Encoder Command Input.
6. Make the following hardware connections:
• Disconnect all connections to J3.
• Connect the motor encoder to J2.
• Jumper the Encoder Inputs to the Encoder Outputs by con-
necting the following pins:
J1-7 to J1-14
J1-8 to J1-15
J1-9 to J1-16
J1-10 to J1-17
J1-11 to J1-18
J1-12 to J1-19
7. Choose the E
ncoder Diagnostics command icon from
ULTRA Master.
8. Choose Z
ero Count for both the Motor Encoder and Master Posi-
tion Input.
9. Slowly rotate the encoder shaft by hand while observing the
counts for both the Motor Encoder and Master Position Input. The
Motor Encoder and Master Position Input line counts should be
equal.