Micro Motion RFT9709 Manual de instrucciones descargar pdf (Pagina 144)

130

Using ProLink

Software with Micro Motion

Transmitters

Configure Menu: Events

continued

Current levels for milliamp events

Event setpoints

Any value of the assigned process variable can serve as the setpoint at

which the event switches states. Enter the setpoint into the Setpoint text

box under Event 1 or Event 2.

• Before establishing the setpoint for any process variable, assign a

process variable to the event as instructed on page 128.

• Before establishing the setpoint for a total or inventory, configure

outputs to indicate forward, reverse, or bi-directional flow, as

instructed in

Section 9.6

, page 104.

12.3 Current levels for milliamp

events

Use the Configure Outputs dialog box to set low and high current levels

for a milliamp event indicator. Open the Configure menu, then choose

Transmitter Outputs.

• Enter the desired low current level into the 4 mA text box under

Milliamp 1 or Milliamp 2.

• Enter the desired high current level into the 20 mA text box under

Milliamp 1 or Milliamp 2.

If a milliamp output functions as an event indicator, the output produces

the programmed high current level in an ON state, and the low current

level in an OFF state. The programmed low current level must be lower

than the high current level.

The low or high configuration of the alarm determines when the output is

ON or OFF, as shown in the following example.

12.4 Reading event states

The View menu enables the user to read the ON or OFF states of events

in two different windows:

• Event 1 On and Event 2 On indicators in the Informational frame of

the Status window indicate event states. To view the Status window,

open the View menu, then choose Transmitter Status.

• Indicators in the Output Levels window also show the ON or OFF

state of Event 1 and Event 2. To view the Output Levels window,

open the View menu, then choose Transmitter Outputs.

Example:

Given:

The primary milliamp output indicates Event 1. Density is the

process variable.

Problem:

With Event 1 configured as a low alarm, set the output to

produce an 18 mA current while density remains below the setpoint,

and a 10 mA current if density exceeds the setpoint.

Solution:

Open the Configure menu, then choose Transmitter Outputs

to open the Configure Outputs dialog box.

• Enter a value of 10.00 into the 4 mA text box under Milliamp 1.

• Enter a value of 18.00 into the 20 mA text box under Milliamp 1.

The primary milliamp output will remain ON and produce an 18 mA

current unless density exceeds the setpoint.

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 213 214

Comentarios a estos manuales

Sin comentarios

Micro Motion RFT9709 Manual de instrucciones Pagina 144

Comentarios a estos manuales