Skip to content

VFD MON Documentation

This is Varible Frequency Drive which is used for the monitoring the RPM and Ampere of the motor.

Block Icon

VFD_MON Block - Block Icon

This VFD block icon have two parts first is motor and another is PID to show the ampere.

Motor :

When we click on the motor then motor faceplate open where we can see the details related to the motor.

Motor Block - Block Icon

The motor block icon provides a visual representation of the motor’s state using color-coded indicators. Each color or blinking combination signifies a specificoperating condition, helping operators quickly identify the motor's current status.

  • 1 Tag Number: Displays the process tag.
  • 2 Motor body: Displays information regarding the motor’s status and operation.
  • 3 Moving Ring : Displays the direction of the motor(reverse or forward).

i. Red : Motor is ready to run. Motor Block - Block Icon

ii. Green : Motor is running. Motor Block - Block Icon

iii. Blinking Magenta and Red : Motor is Tripped. Motor Block - Block Icon Motor Block - Block Icon

iv. Blinking Yellow and Red : Permission not satisfied in Motor . Motor Block - Block Icon Motor Block - Block Icon

v. Blinking Blue and Red : Interlock occured in Motor . Motor Block - Block Icon Motor Block - Block Icon

vi. Green with yellow circle : Motor running with permission bypassed . Motor Block - Block Icon

vii. Green with yellow Blue : Motor running with interlock bypassed . Motor Block - Block Icon

Motor Faceplate

In the Motor REV faceplate, there are 4 tabs:

  1. Operation Tab : For the operation of the motor.

  2. Basic Tab : Displays basic feedback and operational summary.

  3. Advance Tab : Advanced options for motor configuration and setup.

  4. Diagnostics Tab : Shows all feedback and diagnostic parameters.

Operator Tab Description

Motor Block - Operation Tab

Operating Mode:
  • AUTO – Enables automatic mode (commands from logic or PLC).
  • MAN – Enables manual mode (commands via HMI).
  • The currently selected mode is highlighted in green.
Control Command:
  • START FWD(forward) – Sends command to start the motor in Clockwise direction which can be seen in block icon.
  • START REV(reverse) – Sends command to start the motor in anticlockwsie direction which can be seen in block icon.
  • STOP – Sends command to stop the motor.
  • These buttons are only active in manual mode.
Feedbacks:
Feedback Description Status Indicator
INTL Interlock conditions are valid 🟢 = OK
🟡 = Interlock Occurred
PERM FWD Start motor in clockwise permission 🟢 = OK
🟡 = Permission Not Satisfied
PERM REV Start motor in anticlock permission 🟢 = OK
🟡 = Permission Not Satisfied
Trip Feedback Indicates motor fault or trip condition. =TRIP OK
= TRIP
Motor Status:
  • This field displays the current state of the motor.
  • Status example in image: Ready_MAN
    > Meaning: Motor is ready and in manual mode.

Basic Tab Description

Motor Block - Block Icon

Feedbacks:
Label Description Example Shown
Operating Mode Displays the current control mode of the motor. MANUAL OR AUTO
RL_Selection Shows the remote/local control selection. LOCAL OR REMOTE
Interlock Indicates whether all interlocks are satisfied. 🟢 = OK
🟡 = Interlock Occurred
Permissive FWD Shows if permissive conditions are met for motor start in clockwise direction. 🟢 = OK
🟡 = Permission Not Satisfied
Permissive REV Shows if permissive conditions are met for motor start in anticlockwise direction. 🟢 = OK
🟡 = Permission Not Satisfied
Trip Feedback Indicates motor fault or trip condition. = TRIP OK
= TRIP
Run FB FWD Shows whether the motor is currently running in clockwise direction. 🟢 = Running
🔴 = Not Running
Run FB REV Shows whether the motor is currently running in anticlockwise direction. 🟢 = Running
🔴 = Not Running
Operational Summary:
  • RUN TIME – Total Motor Run time.

Advance Tab Description

Motor Block - Block Icon

Motor Contol Parameter:
  • MTM - This is the time(sec) upto which motor wait for the run feedback otherwise goes in fault.
Operational Summary:
  • RUN TIME – Total Motor Run time.

Motor REV Diagnotics Tab

Motor Block - Block Icon

Diagnotics parameter

  • Permissive FWD – green color when permission FWD is OK and yellow color when permission FWD not satisfy.
  • Permissive REV – green color when permission REV is OK and yellow color when permission REV not satisfy.
  • Interlock – green color when Interlock is OK and yellow color when Interlock occurs.
  • Trip – green color when Trip is OK and magenta color when Trip occurs.
  • Perm FWD – click on checkbox to bypass the permission for clockwise direction.
  • Perm REV – click on checkbox to bypass the permission for anticlockwise direction.
  • Interlock – click on checkbox to bypass the interlock.

AMP:

It shows the ampere of the motor. - when we click on the AMP button it opens a PID facepalte using which we can increase and decrease Ampere of the motor.

Faceplate Tabs

Basic Level Tab

Block Icon

PID Basic Faceplate Description

  • PV (Process Variable): Real-time value from sensor.
  • SV (Setpoint Variable): Target value set for process control.
  • MV (Manipulated Variable): PID controller output.
  • MVLO (Min MV): Minimum value allowed for manipulated output.
  • MVHI (Max MV): Maximum value allowed for manipulated output.
  • L_SP (Local Setpoint): Local setpoint value(given by Operator)
  • C_SP (Cascade Setpoint): Cascade setpoint reference.(Calculated setpoint)
  • SPLO: Lower override limit for setpoint.
  • SPHI: Upper override limit for setpoint.

Advanced Level Tab

On clicking the Adva button, the Adva Tab will open.

Only authorized users can access this after logging in.

Block Icon

PID Advanced Faceplate Description

Control Mode & Action Selection

  • Output Action (OP_AT): Sets the controller output to Direct (DIR) or Reverse (REV).
  • Control Action (CT_AT): Defines the internal control mode as Direct (DIR) or Reverse (REV).
  • Setpoint Tracking (SP_TR): Enables (EN) or disables (DIS) setpoint tracking.

Alarm & Process Variables

  • PV: Real-time process variable value.
  • PV_LO: Low limit for process variable.
  • PV_HI: High limit for process variable.
  • PVLL: Very low alarm threshold.
  • PVL0: Low alarm threshold.
  • PVHI: High alarm threshold.
  • PVHH: Very high alarm threshold.

PID Tuning Parameters

  • P (Proportional Gain): Controls response to present error.
  • I (Integral Time): Eliminates accumulated error over time.
  • D (Derivative Time): Predicts future error based on rate of change.

Process Variable Limits

  • PVHH: Critical upper process variable limit.
  • PVHI: Warning-level high limit.
  • PVLO: Warning-level low limit.
  • PVLL: Critical lower process variable limit.

Faceplate Interface & Navigation

  • Tag Number: Shows PID block tag (e.g., 120HBP101).
  • Toggle Switches & Action Buttons: Used for mode switching.
  • Tuning Adjustment Section: Area for modifying P, I, D values.
  • Action Mode Indicators (Green Highlight): Indicates currently active state.

Alarm Handling Logic

The PID block includes robust alarm handling features for process safety and operator awareness. The alarm window behavior is as follows:

Low Alarm

  • When a Low Alarm occurs:
  • The alarm window starts blinking to indicate an active alarm.
  • When the Acknowledge (ACK) button is pressed:
    • The alarm is acknowledged.
    • The blinking stops.

Very Low Alarm

  • When a Very Low Alarm occurs:
  • The alarm window starts blinking to indicate an active alarm.
  • When the ACK button is pressed:
    • The alarm is acknowledged.
    • The blinking stops.

High Alarm

  • When a High Alarm occurs:
  • The alarm window starts blinking to indicate an active alarm.
  • When the ACK button is pressed:
    • The alarm is acknowledged.
    • The blinking stops.

Very High Alarm

  • When a Very High Alarm occurs:
  • The alarm window starts blinking to indicate an active alarm.
  • When the ACK button is pressed:
    • The alarm is acknowledged.
    • The blinking stops.

The ACK button is essential for managing active alarms and restoring a clear view on the HMI after operator intervention.