KB Electronics KBRG-255 User Manual

Page 17

G. Response (RESP) Trimpot – This trimpot determines the dynamic response of the

control. The factory setting is approximately 50% of full rotation. The setting may be
increased if a faster response is required. (Note: If response is made too fast, unstable
operation may result.)

H. Timed Current Limit (TCL) Trimpot – Trimpot is functional only when control is wired for

3-wire Start/Stop and J6 is in the TCL position. The TCL trimpot sets the delay time for
the Timed Current Limit. The trimpot is adjustable over a time range of 1-15 seconds and
is factory set for approximately 5 seconds. Calibrate the TCL trimpot by setting the
trimpot to the approximate desired delay time as follows: (See table 7.)

TABLE 7 – CURRENT LIMIT TIMER SETTINGS

Approx. Trip Time

(Secs)

Trimpot Position

Full CCW

Midway

Full CW

IX.

FUNCTION INDICATOR LAMPS.

A. LED 1 Power On (PWR ON) – Indicates that the drive is energized with the AC line.

B. LED 2 Current Limit (CL) – Indicates that the drive is in Current Limit. If set in the timed

Current Limit mode (J6 set to "TCL") and has "timed out," the LED 2 will remain ON until
the drive is restarted.

C. LED 3 Forward Enable (FWD EN) – Indicates that the drive is engaged in the forward

direction. [Enable circuit closed (terminals "8" and "9" joined), the start circuit initiated and
a "forward" speed command.] The FWD EN lamp will also be lighted in the reverse
direction if the control is in regeneration.

D. LED 4 Reverse Enable (REV EN) – Indicates that the drive is engaged in the reverse

direction. [Enable circuit closed (terminals "8" and "9" joined), the start circuit initiated and
a "reverse" speed command.] The REV EN lamp will also be lighted in the forward
direction if the control is in regeneration.