Process Control Instructions
The Process Control instructions include these instructions:
Available Instructions
Ladder Diagram
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Function Block and Structured Text
If you want to | Use this instruction |
Provide alarming for any analog signal. | ALM |
Control discrete devices, such as solenoid valves, pumps, and motors, that have only two possible states (e.g., on/off, open/closed, etc.). | D2SD |
Control discrete devices, such as high/low/off feeders that have three possible states (e.g., fast/slow/off, forward/stop/reverse, etc.). | D3SD |
Perform a delay of a single input. You select the amount of deadtime delay. | DEDT |
Convert an input based on a piece-wise linear function. | FGEN |
Provide a phase lead-lag compensation for an input signal. | LDLG |
Regulate an analog output to maintain a process variable at a certain setpoint, using a PID algorithm. | PIDE |
Raise/lower or open/close a device, such as a motor-operated valve, by pulsing open or close contacts. | POSP |
Provide for alternating ramp and soak periods to follow a temperature profile. | RMPS |
Convert an unscaled input value to a floating point value in engineering units. | SCL |
Take the 0-100% output of a PID loop and drive heating and cooling digital output contacts with a periodic pulse. | SRTP |
Provide a time-scaled accumulation of an analog input value, such as a volumetric flow. | TOT |
Control a single process variable by maintaining a single controller output. | IMC |
Control a single process variable by manipulating as many as three different control variables. | CC |
Control two process variables to their setpoints using up to three control variables. | MMC |
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