Danfoss 080G0325 Посібник користувача - Сторінка 9

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User Guide | Stepper Valve Extension Module, Type EKE 1P

Valve config

Any changes made to parameters in this group will only take effect after a restart of the

controller, e.g. by a power cycle or by toggling the main switch.

Valve configuration

Application 1: Set from AK-PC except if the valve type is set to User Defined in AK-PC,

then it is according to below list (see Application mode 2).

Application 2:

0 = no valve, 1 = UserDef,

2 = ETS 12C, 3 = ETS 24C, 4 = ETS 25C, 5 = ETS 50C, 6 = ETS 100C,

7 = ETS 6, 8 = ETS 12.5, 9 = ETS 25, 10 = ETS 50, 11 = ETS 100,

12 = ETS 250, 13 = ETS 400,

14 = KVS 2C, 15 = KVS 3C, 16 = KVS 5C,

17 = KVS 15, 18 = KVS 42,

19 = CCMT 0, 20 = CCMT 1,

21 = CCMT 2, 22 = CCMT 4, 23 = CCMT 8,

24 = CCMT 16, 25 = CCMT 24,

26 = CCMT 30, 27 = CCMT 42,

28 = CCM 10, 29 = CCM 20, 30 = CCM 30, 31 = CCM 40,

32 = CTR 20

33 = CCMT 3L, 34 = CCMT 5L, 35 = CCMT 8L

Valve fallback OD

During fail-safe mode in application 1 (e.g. CANBUS signal lost), the valve will apply this

opening degree.

Valve motor type

Define a type of motor used in the stepper valve (Unipolar/Bipolar).

Valve drive current

The current applied to each phase of the stepper motor during actual valve movement.

Entered as a peak value.

Valve step

Read-out of the valve opening degree in number of steps.

positioning

Valve total steps

The number of steps that correspond to changing the valve position from 0 – 100% OD.

Valve speed

The desired valve drive rate in steps per second.

Please note that a higher valve speed will produce a lower torque. If the valve is used in

systems having high differential pressure, it is better to operate the valve with a lower

step rate.

Valve start speed

This is used to limit the starting speed of the valve in order to provide higher motor

torque at start-up to prevent the valve from potential step loss.

Valve emengency

During power failure conditions, the valve can be driven at higher speed when required

speed

to close faster. This function requires a back-up battery connected to the EKE.

Valve acceleration

These features are used with valves running at higher speed i.e 300 pps and above.

current

Typically, at start-up high torque is required to operate the valve. The high torque at

start-up can be maintained by using acceleration current as required.

Valve acceleration

time

Valve holding current The percent of the programmed Max Phase Current that should be applied to each

phase of the stepper output when the valve is stationary. If required, this current

ensures that the valve maintains its last programmed position.

Valve step mode

Stepper motor can be driven with various step excitation methods, depending on valve

requirements and operating conditions.

The valves can be driven in full step 1/1, half step 1/2, or in microsteps (1/4, 1/8, 1/16).

Valve duty cycle

The required valve duty cycle can be set between 5-100% using this parameter.

Valve OD during stop The valve will apply this opening degree if the control is stopped (main switch off ).

Start backlash

The parameter defines the operation of the start backlash function. The valve will

normally open from this point onwards.

Compensation

This setting is used to correct for mechanical hysteresis of the valve's designs including a

backlash

reduction gear. To ensure that the gear backlash is at a minimum, the motor will drive a

number of extra steps every time the direction of the motor is changed.

Overdrive

When the overdrive is enabled and the block timer has expired, next time the valve

closes to 0% OD, it will close with some extra steps according to this setting.

Overdrive enable OD After being closed, the valve opening degree must exceed this value before the

overdrive function is enabled again.

Overdrive block time After an overdrive has occurred, the overdrive function may not occur again within this

time.

Valve excitation time

The time that the drive current is applied after the motor has stopped before going to

after stop

holding current. This will make sure that the valve has achieved the final position before

going to holding current.

Fac: no valve

0 – 100%

Fac: 0%

Unipolar / Bipolar

Fac: Unipolar

10 – 1000 mA

Fac: 10 mA

1 – 8000 steps

Fac: 1 step

10 – 400 pps

Fac: 10 pps

1 – 100%

Fac: 20%

50 – 200%

Fac: 100%

100 – 150%

Fac: 100%

10 – 150 ms

Fac: 10 ms

0 – 300%

Fac: 0

Full, Half, 1/4, 1/8, 1/16

Fac: 1/8

5 – 100%

Fac: 100%

0 – 100%

Fac: 0%

0 – 50%

Fac: 0.0%

0-10%

Fac: 0.0%

0 – 20%

Fac: 5.0%

0 – 100%

Fac: 0%

0 – 1440 min.

Fac: 10 min.

0 – 1000 ms

Fac: 10 ms

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