CONTREX M-Traverse - Manual (Page 98)

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DIRECT MODE
The Direct mode is used to calibrate and troubleshoot the M–Traverse. In the Direct
mode of operation, you can set the Speed Command Out from the M–Traverse that is
connected to the motor drive, directly. The Direct mode is an open-loop mode of
operation. Therefore, Scaling, Acceleration/Deceleration, and closed loop
compensation (PI) software are not involved in the Direct mode.
The Direct mode is used in conjunction with the Run and F-Stop controls. The Run
input (J4, pins 6,7) activates the Direct mode when the Control Mode (CP-14)
parameter has been set to “2” (enable Direct mode). When the Direct mode has been
activated, the analog output level goes immediately to the DAC bits specified in the
Direct Analog Command (CP-62). The Direct Analog Command (CP-62) parameter
uses the full 12 bit resolution of the analog Speed Command Output. A positive value
indicates a forward direction and a negative value indicates a reverse direction. The F-
Stop input will move the Speed Command Out to zero immediately.
The Drive Enable logic output is active during Run and deactivated during F-Stop.
The Forward and Reverse Limits are also active. If the Follower mechanism
encounters a Forward or Reverse Limit, it will immediately stop (F-Stop) and go to zero
speed with no deceleration. The Follower mechanism can be moved away from either
limit by any control mode that move the Follower mechanism in the opposite direction
from the limit. All of the setpoint, Run and F-Stop changes will occur without the Accel/
Decel ramps.
Caution: To avoid damage to your system, the M–Traverse must be calibrated and the
motor drive set up before you enter the Direct mode. Refer to Installation/
Setup: Calibration.