Omron M1 Series User Manual page 474

8 Other Functions
PID Feedback Value Monitor (PID Feedback Value Monitor
(3010Hex-0DHex))
The PID feedback value is converted to the control-target physical quantity (such as the temperature,
pressure, etc.) using the data of PID Control Maximum Scale (3024Hex-07Hex) and PID Control Mini-
mum Scale (3024Hex-08Hex).
Monitor value = (PID feedback value (%)/100) × (Maximum scale - Minimum scale) + Minimum scale
PID Integral Reset (PIDC)
Use this function to clear the integral value of PID operation.
Allocate "33: PIDC (PID integral reset)" to Output Terminal [DO1] Function Selection (3005Hex-15Hex)
and Output Terminal [ROA, ROB] Function Selection (3005Hex-1CHex).
The values are cleared each time the PIDC terminal is turned ON.
Never turn ON the PIDC terminal during the PID operation as overcurrent tripping may occur.
Be sure to deactivate the PID operation before turning ON the PIDC terminal.
PID Sleep Function
In parameters 300EHex-10Hex to 300EHex-12Hex, 300EHex-18Hex, 300EHex-19Hex, a sleep func-
tion for stopping the inverter when the discharge pressure rises and the discharge volume reduces
during pump control is set. When the discharge pressure rises, the frequency set value of the output of
PID controller drops, and the PID Control Sleep Timer for Process Control (300EHex-10Hex) elapses
at the PID Control Sleep Frequency for Process Control (300EHex-11Hex) or below, the inverter de-
celerates and stops. However, PID control itself continues. When the discharge pressure falls, the fre-
quency set value of the output of PID controller rises, and the PID Control Restart Frequency after
Stopping for Process Control (300EHex-12Hex) is exceeded, the inverter resumes operation. The re-
start conditions can be adjusted by PID Control Restart Feedback Deviation after Stopping for Process
Control (300EHex-18Hex) and PID Control Restart Delay Time after Stopping for Process Control
(300EHex-19Hex) based on the time and pressure variation.
• PID Control Sleep Frequency for Process Control (300EHex-10Hex)
The sleep frequency is set.
• PID Control Sleep Timer for Process Control (300EHex-11Hex)
The time from when the PID output reaches or falls below the value set in PID Control Sleep Fre-
quency for Process Control (300EHex-10Hex) until the inverter starts deceleration stop is set.
• PID Control Restart Frequency after Stopping for Process Control (300EHex-12Hex)
The wakeup frequency is set. Set the wakeup frequency larger than PID Control Sleep Frequency
for Process Control (300EHex-10Hex). If the wakeup frequency is set smaller than the sleep fre-
quency, the sleep frequency is ignored, and the sleep function operates when the PID output falls
below the wakeup frequency set value.
• Allocating Under sleep mode of PID control "PID-STP" (Output Terminal [DO1] Function Selection
(3005Hex-15Hex), Output Terminal [ROA, ROB] Function Selection (3005Hex-1CHex) = 44)
PID wakeup "PID-STP" outputs an ON signal when the inverter stops by the sleep function during
PID control. If a signal output indicating that the inverter is in a stopped state is required, it is neces-
sary to allocate "PID-STP."
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M1 Series EtherCAT Type User's Manual (I670)