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Operation VTK - TR -BA- 171e - 1 - User Manua l MDS 3080 -V 67 “OFF ”, the t rigge r onl y affec ts a segment on “infinite” n um ber of p ulses. In that case, once the trigger is sw itched to “low” , the syst em moves on…

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VTK-TR-BA-171e-1 - User Manual MDS 3080-V

7.9 Scenarios

The MDC does not only allow you to save setups of parameters, but also to define combinations

of setups, so called scenarios.

7.9.1 Basics about Scenarios

Each scenario consists of up to ten segments, each with a setup, a specific scenario delay and a

Number of Pulses (see Fig. 27). You can define up to four scenarios. You can only choose

between the setups 0, 1, 2 and 3. A maximum of ten segments can be chained together,

consisting of any possible combination of the four potential setups 0, 1, 2 and 3. As soon as you

enter “-” when selecting a segment, the chain ends. No further segments will be shown in the

menu. This is possible even for the first segment you select. In that case, the working

configuration (setup 0) would be executed instead of the scenario.

Fig. 27: Scenarios of an MDC

For each segment in a scenario, you can enter a Number of Pulses. For this segment, the number

then replaces the Number of Pulses saved with the original setup. The value can be between 1

and 32,000 or “infinite”. With “infinite”, the trigger signal defines the end.

The scenario delay marks the time span between two segments. It can be set in the range of

0.1 ms and 1000 ms.

INFORMATION

Scenario delay with heater

With a nozzle heater in use, the minimum scenario delay is 2.0 ms, just like the normal delay.

Each scenario has a scenario PLC-stop, which is either “ON” or “OFF”. If it is “ON”, you can end the

scenario prematurely. The moment the trigger switches to “low”, the scenario ends. When it is

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VTK-TR-BA-171e-1 - User Manual MDS 3080-V

“OFF”, the trigger only affects a segment on “infinite” number of pulses. In that case, once the

trigger is switched to “low”, the system moves on to the scenario delay, followed by any

segments still to come. Unlike the “ON” situation, the scenario does not end immediately.

Scenarios can be controlled in two ways:

• via keypad (see next part)

• with remote commands via the serial interface RS-232C (see paragraph 8.1, page 82)

Scenarios can also be controlled directly via select pins (see paragraph 7.8, page 64). You have to

set item “Scenario” of the submenu “Scenario” to “ON“. While this is the case, the display shows

“Scenario” where it usually shows the frequency.

7.9.2 Entering Scenarios

To enter the parameters for a scenario you have to go to the submenu “Scenario” (see

paragraph 4.5.5, page 31). To do so, you have to press [enter] in the main menu and then [←]

twice. Confirm with [enter] to reach the item “Scenario”. Press [enter] and use either [↑] or [↓] to

switch between “ON” and “OFF”. Select “ON” and confirm your choice with [enter].

Now you can select the desired scenario with [→] (also paragraph 4.5.5, page 31, the diagram for

the submenu “Scenario-Def”). Press [enter]. Enter the first setup (“0”, “1”, “2”, “3” or “-”) and

confirm with [enter]. With [→] you reach “ScNP”, where you can enter the Number of Pulses. For

the scenario, this value will replace the one saved within the setup. Values can be between 1 and

32,000 or “infinite”. Confirm with [enter]. With another [→] you reach “ScDL”, where you can set

the scenario delay. Afterwards confirm with [enter].

Repeat with the second segment, and so on, until you have entered all segments you need or

until you reached the maximum of ten defined segments. When you want to end the chain, enter

“-” instead of the number of a setup. No further segment will be shown in the menu. If you

replace a “-” on a given segment with a correct number, it is unlocked. The system starts with the

setup NP and 10 ms as Scenario-Delay, but you can change these values individually.

With [→] after the last segment you reach “PLCStop” (Scenario-PLC-Stop). After pressing [enter]

you can switch between “ON” and “OFF” (using any arrow key). Confirm your choice with [enter].

(If PLCStop is your only goal in this submenu, it is faster to click [←] once on this level. Like all

other menus, this is “wrap-around”.)

This process you have to repeat for each of the up to four scenarios you want to define.

Scenarios are started with a trigger event. This can be a trigger via keypad, a PLC interrupt or the

“Valve Open” command (without parameters) via the serial interface.

INFORMATION

When no scenario is triggered

Valve-Up/-Down via serial interface and the [F1] key cannot trigger a scenario.

7.9.3 Scenario Selection with Select Pins

Scenarios can be directly controlled via the select pins of the AUX socket (see Fig. 28, page 68), if

“Scenario” in the submenu “Scenario” is turned “ON”. If that is not the case, they switch between

the setups 0 to 3 instead.

With the pins Select_I (AUX socket Pin 5) and Select_II (AUX socket Pin 8) it is possible to switch

rapidly between different sets of parameters. In their blank state, the select pins are on a high

level (pull-ups to 24 V). You have to switch one or both to low (Gnd) to select a different setup

(see Tab. 22, page 68). You have to switch them before triggering.

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VTK-TR-BA-171e-1 - User Manual MDS 3080-V

Fig. 28: Select Pins

Fig. 29: Schematic of usage of select pins

INFORMATION

Select pins with other commands

Select pins will be checked for triggering via PLC interface, for the serial commands VALVE:OPEN,

VALVE:AOPEN, SVALVE:OPEN and SVALVE:AOPEN (in the versions without parameters) and when

pressing the key [trig].

You can also simulate the select pin settings for these four commands by using the command

extensions “S0”, “S1”, “S2” or “S3” (see paragraph 8.1.2.2 "Explanations", page 88).

Parameters Select1 Select2 Scenario „OFF“ Scenario „ON“

High

Setup 0 (working

configuration)

Scenario 1

Low

High

Setup 1

Scenario 2

High

Low

Setup 2

Scenario 3

Low

Setup 3

Scenario 4

Tab. 22: Select Pin settings