Warning – Yaskawa DS387 User Manual

Page 13

2CN

GPD
503

AI-14B BOARD

L1
L2
L3

T1
T2
T3

I M

MOTOR

MCCB

SHIELD

HIGH ACCURACY
VOLTAGE / CURRENT
DEVICES

2CN

TC2

TC1

TC3

TC4

14 BIT
A/D

1 / 10

FREQ.
REF

0-±10V
or 4-20mA

1 / 10

Figure C3. Interconnection for Analog Speed Reference (AI-14B) Circuit in GPD 503

C7. Adjustments.

There are no adjustments to be made on the Analog Speed Reference option; however, the GPD 503 will have to
be reprogrammed for the input requirement of the remote device and the reversing or non-reversing requirement
of the specific application.

WARNING

IF THE APPLICATION REQUIRES THAT REVERSE MOTOR
ROTATION BE PROHIBITED, Sn-25 MUST BE SET TO X X X 1
SO THAT THE MOTOR WILL STOP ANY TIME POLARITY OF
THE SPEED REFERENCE GOES NEGATIVE.

IMPORTANT

For the Analog Speed Reference circuit to function properly, system constant
Sn-04 must be set to XXX 0 and Sn-08 must be set to XXX 0 (input to AI-14B
replaces auto speed reference signal).

Adjustment of the bias and gain of the frequency command are done by changing the associated GPD 503
constants; see Figure C4 and Table C3.

Yaskawa Electric America, Inc-www.drives.com

02Y00025-0296 Page 13 OF 14

REL. 08/23/91

ANALOG SPEED REFERENCE

(BIPOLAR) (AI-14B) MODEL DS387