Rockwell Automation 1302 575v AC Drive - Canada Only User Manual

Page 68

8–10

Programming

Publication 1302-5.0 — January, 1998

FĆ11 Remote Reference Gain

This parameter scales the

maximum remote speed

reference to match external

equipment.

Parameter Range:

Default Setting:

Step Size:

60% to 100% of full scale maximum

reference

100%

0.10%

Normally, the maximum speed reference (the amount of reference at maximum speed, FĆ04) is either 10

VDC or 20 mA. The reference gain is used to scale the speed reference to another value (for example,

9.5 VDC or 19 mA). Enter the parameter value in percent of full scale reference.

To calculate the scaled reference if you are usinga 0 to 20 mA remote reference, use the following

equation:

Desired Maximum Reference (mA)

Reference Range (20)

x 100 = % gain (mA reference)

Example

If the remote speed reference is 0 to 20 mA and the maximum reference required is 19.2 mA, scale as

follows:

19.2

x 100 = 96% gain

To calculate the scaled reference if you are usinga 0 to 10 VDC remote reference, use the following

equation:

Desired Maximum Reference (VDC)

Reference Range (10)

x 100 = % gain (VDC reference)

Example

If the remote speed reference is 0 to 10VDC and the maximum reference required is 9.5 VDC, scale as

follows:

9.5

10 x 100 = 95% gain