Emerson Series 3000 MVD User Manual

88

If No. of Stages is set to 

, a single pump or valve is used to control the batch. (You can assign both a 

pump and a valve if desired, although only one is necessary.) When the batch is started, the pump 
starts or the valve opens; at the configured target, the pump stops or the valve closes. Open Primary, 
Open Secondary, and Close Primary values are not required when configuring the preset (see 
Section 11.6).

If No. of Stages is set to 

, two valves are used to control the batch, and the following requirements 

apply when configuring the preset:

•

Both Open Primary and Open Secondary must be configured.

•

Either Open Primary or Open Secondary must be set to 

. Both may be set to 

 if desired.

•

Close Primary must be configured.

You can configure up to six batch presets. Preset 1 cannot be disabled, but you can change its 
configuration.

Table 11-3 defines the options for configuring presets. To configure a preset, first select the preset to 
be configured, then define its parameters.

Enable preset

• Yes for preset 1
• No for presets 2–6

• If set to Yes, the batch preset can be selected in the View menu. See 

• If set to No, the batch preset is disabled and cannot be selected.
• Preset 1 cannot be disabled.

Name

• Preset 1
• Preset 2
• Preset 3
• Preset  4 
• Preset 5
• Preset 6

• Enter the name that will appear on operation screens and in preset selection 

menus. 

• A maximum of 22 characters can be entered. Only 21 characters are 

displayed. You can use the left and right cursor control buttons to scroll 
through and view the entire name.

Density curves

None

• If a derived variable is selected as the flow source, you can select a density 

curve that will apply to this preset. See the enhanced density manual.

• The batch total will be based on the density curve for that variable.

Open primary

(1)

0.00% of target or
0.0 kg quantity

• Enter the quantity or the percent of the target at which the primary valve will 

open. See the examples later in this section.

• Either Open Primary or Open Secondary must be set to 0. If one of these 

parameters is set to a non-zero value, the other is set to 0 automatically.

• To enable 2-stage batch control, see Section 11.5.
• Before a batch can be started, the primary valve must be assigned to a 

discrete output. See Section 8.3.2.

Open 
secondary

0.00% of target or
0.0 kg quantity

• Enter the quantity or the percent of the target at which the secondary valve 

will open. See the examples later in this section.

• Either Open Primary or Open Secondary must be set to 0. If one of these 

parameters is set to a non-zero value, the other is set to 0 automatically.

• To enable 2-stage batch control, see Section 11.5.
• Before a batch can be started, the secondary valve must be assigned to a 

discrete output. See Section 8.3.2.

Close primary

80.00% of target or
0.0 kg quantity

• Enter the quantity subtracted from the target, or the percent of the target, at 

which the primary valve will close. See the examples later in this section.

• The secondary valve always closes when the target is achieved.
• To enable 2-stage batch control, see Section 11.5.
• Before a batch can be started, the primary valve must be assigned to a 

discrete output. See Section 8.3.2.