62
Gem6K Hardware Installation Guide
RS-232 Daisy Chain and RS-485 Multi-Drop Problems
For more information about RS-232 daisy chain and RS-485 multi-drop problems,
see
RS-232/485 Communications
in
Chapter 4 – Special Features
.
System Problems
If your Gem6K drive is functioning properly, other parts of your system may be
causing problems. It may be difficult to identify where the problem is coming
from. To diagnose system problems, we recommend that you first have the drive
perform its autorun function. Then check the other topics in this section.
Using Autorun Mode to Isolate Problems
In autorun mode, the motor runs open loop—the Gem6K drive generates its own
internal control signal, and commands the motor to turn clockwise at 1 revolution
per second.
NOTE: In autorun mode, the drive limits current to 90% of drive rating or continu-
ous motor current rating, whichever is lower.
Follow these steps to put the drive in autorun mode, which will verify that the
drive is functioning properly, and is not the source of the problem.
1.
Disconnect the load from the motor.
2.
Perform these procedures from
Chapter 2 Installation:
• Connect the Motor (power and feedback)
• Connect AC and +24VDC Power
• Configure the Drive
The final step in “Configure the Drive” is issuing a DMODE13 command, which
configures the drive for autorun.
3.
Enable the drive by connecting Pin 1 to Pin 2 on the drive’s 50 pin DRIVE I/O
connector. NOTE: connecting pin 1 to pin 2 may require that you use a breakout
module, such as Compumotor’s GEM-VM50.
4.
Apply AC and +24VDC power.
5.
In Terminal Emulator mode, issue the following commands:
DRIVE1
(enables the drive)
DMODE13
(changes mode to autorun)
6.
The motor should begin turning clockwise at one revolution per second.
Successful completion of the autorun test indicates that AC power and motor
cables are connected correctly, and that the drive is functioning properly. Check
the topics below for other sources of problems.
AC and DC Power
Verify that your AC power mains and +24VDC supply deliver adequate power to
the respective drive power inputs.
