Color coding standards (ISA-101) in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the color for an alarm state in ISA-101.

SCADA systems

alarm_color = "[1]"  # Color for active alarm

Drag options to blanks, or click blank then click option'

Ared

Bgreen

Cblue

Dyellow

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing green which usually means normal or safe.

Using blue which is not standard for alarms.

In ISA-101, the color red is used to indicate an active alarm state.

2fill in blank

medium

Complete the code to set the color for a normal operating state in ISA-101.

SCADA systems

normal_state_color = "[1]"  # Color for normal operation

Drag options to blanks, or click blank then click option'

Ared

Bgreen

Corange

Dpurple

Attempts:

3 left

💡 Hint

Common Mistakes

Using red which means alarm.

Choosing orange which is for warnings.

The color green is used in ISA-101 to indicate normal operating conditions.

3fill in blank

hard

Fix the error in the code to correctly assign the warning color according to ISA-101.

SCADA systems

warning_color = "[1]"  # Color for warning state

Drag options to blanks, or click blank then click option'

Ablue

Bred

Cyellow

Dgreen

Attempts:

3 left

💡 Hint

Common Mistakes

Using red which is for alarms.

Choosing green which means normal.

ISA-101 uses yellow to indicate a warning state, signaling caution.

4fill in blank

hard

Fill both blanks to define colors for 'inactive alarm' and 'acknowledged alarm' states in ISA-101.

SCADA systems

inactive_alarm_color = "[1]"  # Color for inactive alarm
acknowledged_alarm_color = "[2]"  # Color for acknowledged alarm

Drag options to blanks, or click blank then click option'

Agray

Bblue

Cred

Dyellow

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing red with inactive or acknowledged states.

Using yellow which is for warnings.

ISA-101 uses gray for inactive alarms and blue for acknowledged alarms.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping ISA-101 states to their standard colors.

SCADA systems

isa101_colors = {
  "active_alarm": "[1]",
  "warning": "[2]",
  "normal": "[3]"
}

Drag options to blanks, or click blank then click option'

Ared

Byellow

Cgreen

Dblue

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping warning and normal colors.

Using blue which is not standard for these states.

The standard ISA-101 colors are red for active alarms, yellow for warnings, and green for normal operation.

Practice

1. According to ISA-101 color coding standards, which color typically represents a normal operating state in SCADA systems?

easy

A. Green

B. Red

C. Yellow

D. Blue

Solution

1. Step 1: Understand ISA-101 color meanings

   ISA-101 standard uses colors to indicate system states: green for normal, yellow for warning, red for alarm.

2. Step 2: Identify normal state color

   Green is universally used to show normal or safe conditions in SCADA displays.

3. Final Answer:

   Green -> Option A

4. Quick Check:

   Normal state = Green [OK]

Hint: Normal state is green like a traffic light [OK]

Common Mistakes:

• Confusing red as normal instead of alarm
• Choosing yellow which means warning
• Selecting blue which is not standard for normal

2. Which of the following color codes is correctly used for an alarm state in ISA-101 standard?

easy

A. Blue

B. Green

C. Red

D. White

Solution

1. Step 1: Recall ISA-101 alarm color

   ISA-101 specifies red color to indicate alarm or critical conditions requiring immediate attention.

2. Step 2: Match alarm color to options

   Among the options, only red correctly represents alarm state.

3. Final Answer:

   Red -> Option C

4. Quick Check:

   Alarm state = Red [OK]

Hint: Alarm is red like a fire alarm light [OK]

Common Mistakes:

• Choosing blue which is not alarm
• Confusing green with alarm
• Selecting white which is not standard

3. In a SCADA system following ISA-101, what color should a warning state indicator display if the normal state is green and alarm is red?

medium

A. Blue

B. Yellow

C. Green

D. Red

Solution

1. Step 1: Identify colors for normal and alarm states

   Normal is green, alarm is red as per ISA-101.

2. Step 2: Determine warning color

   ISA-101 uses yellow to indicate warning or caution states between normal and alarm.

3. Final Answer:

   Yellow -> Option B

4. Quick Check:

   Warning state = Yellow [OK]

Hint: Warning is yellow like a caution sign [OK]

Common Mistakes:

• Choosing blue which is not standard
• Confusing green with warning
• Selecting red which is alarm

4. A SCADA screen uses blue for alarm states instead of red. What is the main issue with this according to ISA-101 standards?

medium

A. It breaks color consistency and may confuse operators

B. Blue is harder to see on screens

C. Blue is reserved for normal states

D. Blue causes system errors

Solution

1. Step 1: Understand ISA-101 color consistency importance

   ISA-101 emphasizes consistent color use for quick, clear operator understanding.

2. Step 2: Analyze impact of using blue for alarms

   Using blue instead of red breaks this consistency and can confuse operators, delaying response.

3. Final Answer:

   It breaks color consistency and may confuse operators -> Option A

4. Quick Check:

   Color consistency = Clear operator understanding [OK]

Hint: Wrong alarm color confuses operators [OK]

Common Mistakes:

• Thinking blue causes system errors
• Assuming blue is for normal state
• Ignoring importance of color consistency

5. You are designing a SCADA interface following ISA-101. How should you handle color coding to ensure accessibility for color-blind operators?

hard

A. Avoid using any colors and rely on sound alerts

B. Use only red and green colors without other indicators

C. Use flashing colors only to indicate alarms

D. Add shape or text labels along with colors for status indicators

Solution

1. Step 1: Recognize accessibility needs in ISA-101

   ISA-101 recommends color use be accessible, including for color-blind users.

2. Step 2: Identify best practice for accessibility

   Adding shapes or text labels with colors helps all users understand status regardless of color perception.

3. Final Answer:

   Add shape or text labels along with colors for status indicators -> Option D

4. Quick Check:

   Accessibility = Use multiple indicators [OK]

Hint: Use shapes or text with colors for accessibility [OK]

Common Mistakes:

• Relying only on red/green colors
• Using flashing colors without other cues
• Ignoring accessibility and using sound only