Rockwell Automation Publication 2080-RM001D-EN-E - February 2015 527
Chapter 18
Process control instructions
Process control instructions are used to monitor and maintain process loops for
quantities such as pressure, temperature, flow rate, and fluid level. Process controls
regulate the course by sending an output signal to the control valve.
Function block Description
DERIVATE on page 528 Differentiation of a real value
HYSTER on page 530 Boolean hysteresis on difference of reals
INTEGRAL on page 532 Integration over time
PWM on page 538 Turns the output for a configured channel on or off
SCALER on page 542 Scale input value according to output range
STACKINT on page 546 Stack of integer
Function Description
LIMIT on page 551 Limit
TND on page 549 Stops the current cycle of the user program scan
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