Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 162)

Chapter 6
Installation
6-38
4. The input voltage at base speed is then converted to Raw Adapter Units
according to the following equation.
Base Speed Input x 2048
10
= Raw Adapter Units
5. The Raw Adapter Units are then used to determine the correct scaling
parameter value according to the equation below.
4096
Raw Adapter Units
= Scaling Parameter Value
6. The Scaling Parameter Value should then be entered into the associated
analog input scaling set-up parameter. This procedure will be correct to
within 5%. Verify that the scaling is correct by measuring the actual
motor velocity with a hand tachometer. Fine tune the scaling by
adjusting the appropriate value to minimize any error.
7. Any drift at zero speed can be minimized by adjusting the offset
parameter associated with the channel in use.
Digital Input – Figure 6.26 shows a typical digital input connection.
Figure 6.26
Typical 24VDC Digital Input Connections using External Power Supply
DIGITAL IN 2
53
43
44
45
46
TB3
DIGITAL COMMON
DIGITAL IN 1
DIGITAL IN 3
DIGITAL IN 4
Clear Faults*
Start*
Jog 2*
Stop*
24V DC Common*
24V DC High*
* External to the Drive