EPC
SERVO AMPLIFIER MODULE
Part Number L723888-3xx
ELECTRONIC
Telephone: (231) 929-1660
Oilgear
Fax:
(231) 929-7879
1424 International Dr
Issued May 31, 2018
Web Site:
www.oilgear.com
Traverse City, MI USA 4 9 6 8 6
Bulletin 836260F
52
Example 4
: What settings would be used to produce a 5-second ramp for a 0 to 10 Volt step
command?
A 10 Volt / 5 second = 2 Volt/second ramp is desired. Since both the Rate and Step have values from
1 to 255, an arbitrary value of 10 is chosen for the Step and the Rate value is calculated:
Ramp Rate
= [ Closed Loop Response ]
0.004884
Step / Rate
Rate
= [ Closed Loop Response ]
0.004884
Step / [Ramp Rate]
= 1600
0.004884
( 10 / 2 ) = 39
A step of 10 and rate of 39 make a 2.0037 Volt/second ramp (48 mV step every 24 milliseconds).
Because 10/39 is approximately 1/4, we would expect a step of 1 and a rate of 4 to be close to the ramp
rate, yet provide a smaller staircase. Accordingly, a step of 1 and a rate of 4 create a 1.95 Volt/second
ramp, this time with a 5 mV step every 0.6 milliseconds.
PC Interface
: The PC interface contains a worksheet for ramp values (Advanced Diagnostics Form).
The user selects a desired ramp rate and one of five resolution factors. The worksheet calculation
function will display the results of the most optimal settings.
