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Fakultet for teknologiske fag Bachelor i ingeniørfag
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TABLE OF CONTENTS
TABLE OF CONTENTS ... 3
1 Introduction ... 4
2 Alarm management ... 5
2.1 Step 1: Configure Level Alarms... 5
2.2 Step 2: Configure Level Switches ... 6
2.3 Step 3: Creating an Interlock ... 9
2.4 Step 4: Download ... 10
3 HMI ... 12
3.1 Step 1: Draw Level Switches ... 12
3.2 Step 2: Animate Level Switches ... 12
1 INTRODUCTION
In this task you will learn how to program alarms, and handle alarms in HMI to the two-tank system with DeltaV. Figure 1-1 shows the two-tank system. For this task to make any sense it is important that you do the task about creating a program to the two-tank model, this task is called “Two-Tank Control”.
2 ALARM MANAGEMENT
In this chapter we will learn how to create alarms to the two-tank system.
2.1 Step 1: Configure Level Alarms
In a lot of cases it is important and crucial with alarms. We will now configure alarms to the level of the tank. There are four capacitive level switches on the tanks that we will configure the alarms to, two on each tank.
Let’s start with the level to tank1
Go to Exploring DeltaV and open your area 2-TANK. Right click on the PID_LOOP_1 and open with control studio. There are already alarms inactive in the PID block, at the bottom of the window you can find them. Double click on HI_ALM and sett Limit value to 75 and press Enable, and then press ok, as shown in Figure 2-1.
Figure 2-1 Alarm Properties – high alarm
Now double click on LO_ALM and set Limit value to 35 and press enable, and then press ok, as shown in Figure 2-2.
Figure 2-2 Alarm Properties – low alarm
Now download the program by pressing the button. Press OK and yes until you can
download.
We now have a high and low alarm on the level of tank1.
2.2 Step 2: Configure Level Switches
Now we need to apply alarms to the level switches on both the tanks. We have one capacitive level watch on high and low level.
Choose 2-TANK2 and right click on IO and open it with Control Studio. Press the alarm button to add a new alarm, see Figure 2-3.
Figure 2-3 Insert alarm
Set alarm type: High High Alarm, Priority: Critical and Functional classification: Safety and press browse and choose HA1, OUT_D and press OK as shown in Figure 2-4.
The alarm is now created, you can find it at the bottom of the page. Right click the alarm and choose rename. Rename the alarm to HA_1 like in Figure 2-5, this is the HIGH HIGH alarm for Tank1.
Figure 2-5 Alarm renaming
Press the alarm button to make another alarm. Another HIGH HIGH alarm for Tank2. Exactly the same procedure. Set alarm type: High High Alarm, Priority: Critical and Functional classification: Safety and press browse and choose HA2, OUT_D and press OK. Rename the alarm to HA_2
Press the alarm button to make another alarm. We will now make a Low low alarm for Tank1. Set alarm type: Low Low Alarm, Priority: Warning and Functional classification: Safety, like Figure 2-6. Check the box for inverted and press browse and choose LA1, OUT_D and press OK. Rename the alarm to LA_1
Figure 2-6 Alarm Properties – low low alarm
Press the alarm button to make another alarm. We will now make a Low low alarm for Tank2. Set alarm type: Low Low Alarm, Priority: Warning and Functional classification: Safety, check
the box for inverted and press browse and choose LA2, OUT_D and press OK. Rename the alarm to LA_2
2.3 Step 3: Creating an Interlock
If the level of the tank gets too high, we would like an interlock that makes sure the solenoid valves will open, and the level will decrease.
Place the blocks as shown on Figure 2-7. Press OUT_D on HA1 and connect it to LV1. Do the same with HA2 and connect it to LV2
Figure 2-7 Interlock connection
Mark LV1, a properties box will appear in lower left corner. Double click on MODE, that’s found under Operating. Set Normal mode and Target mode to Cascade. As shown in Figure 2-8. Do exactly the same with LV2.
Figure 2-8 MODE Properties
The level switches on high level will now activate the valves.
2.4 Step 4: Download
We have now created and configured alarms for all the level switches. Press Download, and choose OK and yes until you can download.
Go back to Exploring DeltaV. Right click physical network and choose download physical network as shown in Figure 2-9.
.
Figure 2-9 Download Physical Network
3 HMI
The alarms we created in our program will appear with text and sound when they are activated. We would also like some visual alarms on our four level switches that we have to create in our HMI.
3.1 Step 1: Draw Level Switches
Go to Control Studio and find the picture you made for the Two-tank.
In the Toolbox we can find a rectangle. Place this rectangle close to Tank1, right click on the rectangle and choose Color, and Foreground. Change color to grey. Copy the rectangle so you get four of them.
Press the «A» in the toolbox and write HH in two of the rectangles and LL in the last two. Place the rectangles as shown in Figure 3-1.
Figure 3-1 Alarm placement
3.2 Step 2: Animate Level Switches
Double click on HH next to Tank1, Figure 3-2 will popup, check the Foreground box under Color.
Figure 3-2 Foreground color
Mark Exact Match, delete all the rows and make a new row with value = 1 and color = red. Like Figure 3-3 shows you.
The letters HH will now be red when the high alarm is active.
Figure 3-3 Foreground color assignment
Press the button, Browse DeltaV Control Parameters, 2-TANK2, HA1,OUT_D, mark CV,
Figure 3-4 Browse DeltaV Control parameters – Select CV
The same procedure with the other level switches, but choose value = 0 on the LL alarms, and value = 1 on the HH alarms.
LL TANK1=LA1 HH TANK2=HA2 LL TANK2 = LA2
Our HMI is now upgraded with visual effects when the different alarms are active.
It is best to run the HMI from DeltaV Operat Run. To be able to do that, you need to save your
picture under pictures. Do this go to File Save as, and save the picture in the Pic-folde with
4 OPERATE
In this chapter we will learn how to manage the alarms used in the Two-tank system.
Our HMI is now ready to be run. Double click on DeltaV Operate Run located on the desktop. Press Open and choose the picture you just created, yourname1, and press enter. See Figure 4-1.
Figure 4-1 Open the picture you created.
On the bottom of the picture a lot of alarms will appear, most of these alarms are system alarms that we don’t have to worry about. To get rid of these alarms you need to press Area Filter, like Figure 4-2.
Figure 4-2 Area Filter
Uncheck AREA_A like Figure 4-3 is showing.
Figure 4-3 Uncheck AREA_A
Now run the system in manual and make sure the alarms gets activated at their right value. The alarms will show up on the faceplate and you can press Acknowledge there, or by pressing “Ack All” in the lower right corner of the faceplate. See Figure 4-4.
