TECO-Westinghouse PA7300 Series, Installation And Operation Manual

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*1. The PID sleep function is deactivated when the PID control function is disabled (Sn-19≠09)
*2. When the timer runs out, the AC drive will stop the motor depending on the stopping
method set in Sn-04.
*3. The sleep function is not active in JOG mode.
*4. Sleep mode makes it possible to stop the motor when it is running at low speed and
has almost no load. If power consumption in the system goes back up, the AC drive will
re-start the motor and the power supply. Energy savings can be achieved with this function,
since the motor is only operative when the system needs it.
(21) PID Feedback Display Bias (Bn-21)
(22) PID Feedback Display Gain (Bn-22)
• The PID Feedback value can be inputed from the control terminal as VIN (0~10V) or AIN (4-20mA).
The Feedback value is the addition of VIN and AIN, when the this signal is input from VIN and
AIN terminal simultaneously.
• The multi-function analog output can be set to monitor the PID feedback (When Sn-26=
09 or Sn-27=09)
• The PID Feedback can be monitored by the monitoring parameter Un-21, and the display
unit can be set by Bn-21 and Bn-22 (eg. 0~10V or 4-20mA feedback can be set as a pressure
signal unit, using Bn-21 to set the equivalent pressure value for 0V or 4mA PID feedback and
Bn-22 to set the equivalent pressure value for 10V or 20mA PID feedback).
• The PID feedback also can be monitored by the digital operator after turning on the power supply.
(When Bn-10=04).
• See Appendix B for detailed discussion of PID Control.
2-8
PA 7300 PART II: OPERATION MANUAL
PID Control
Bn-05,
Bn-06
Bn-13
Bn-21,
Bn-22
AUX
VIN
AIN
+
– (F
CMD
)
(F
OUT
)
Cn-14
Cn-15
PID Feedback (Un-21)
Digital operator monitor after turning on power supply
(
when Bn-10=4
)
Gain & Bias
Set Point
Feedback
Feedback
+
–
Freq.
Command
Frequency Command
Upper/Lower bound
Output
Frequency
A01, A02 multi-function analog output
(when Sn-26=09 or Sn-27=09)
Figure 13 PID Display Gain and Bias