Installation manual

Operation and Installation Manual
2013 Cervis, Inc.
71
23.2 Ramp Speed
Ramp speed rise and/or fall from min. to max. can also be programmed for both the positive and
negative (semi-axes) action of a joystick or lever. The Ramp Speed parameter default is 0,
where 0 = no ramp. See Table 27 for adjustable ramp times.
Table 29. Ramp Speeds
Value
Time in
Seconds
Value
Time in
Seconds
Value
Time in
Seconds
Value
Time in
Seconds
0
no ramp
4
0.4
8
1.0
12
2.0
1
0.1
5
0.5
9
1.2
13
2.5
2
0.2
6
0.6
10
1.5
14
3.5
3
0.3
7
0.7
11
1.7
15
5.0
Each output is a PWM signal with current feedback control for switching frequency and pulse
width. The unit superimposes a “dither” signal on the output (with variable frequency and
amplitude) to soften the response of certain hydraulic valves. The “dither” is available only when
the PWM switching output frequency is 5kHz:
• PWM Frequency Range — 33, 35, 40, 45… 1275 and 5kHz
• Dither Frequency Range — 33… 255Hz
• Dither Amplitude Range — 0… 50%
As mentioned, maximum and minimum values, polarity inversion, acceleration or deceleration
ramp, and analog curve type can be set using Tele-Alignment provided the bridge jumper is
made to P6 as shown in Figure 49.
23.3 PWM Current Output Features
• Power Supply Range of Expansion 8 – 30V; Outputs 5 – 35V
• Two (2) identical but independent PWM outputs
• Each output channel has two (2) outputs, but only one is connected dependent upon the
sign (+ or –) of the input
• Output resolution of 128 steps per semi-axis, where Step 0 is a null output and Step 127 is
permanent exit from the positive supply
• 5A maximum current for each output
• Output s short circuit protected