Cervis TM70 Manual de Instalação descarregar pdf (Página 79)

Operation and Installation Manual

2013 Cervis, Inc.

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

no ramp

0.4

1.0

2.0

0.1

0.5

1.2

2.5

0.2

0.6

1.5

3.5

0.3

0.7

1.7

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

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