Mitsubishi Electric FR-A820-00046 Instruction Manual page 780

(A) Application parameters
Input/output signals
The following signals can be used by assigning functions to Pr. 178 to Pr. 189 (Input terminal function
selection) and Pr. 190 to Pr. 196 (Output terminal function selection).
● Input signal
Signal Function
X14
X64
X72
Tab. 5-244: Input signals and parameter setting
● Output signal
Signal Function
FUP
FDN
RL
PID
Tab. 5-245: Output signals and parameter setting
NOTE Changing the terminal assignment using Pr. 178 to Pr. 189 or Pr.190 to Pr.196 may affect other
functions. Set parameters after confirming the function of each terminal.
PID monitor function
● This function displays the PID control set point and measured value on the operation panel, and
can output these from the terminals FM, AM and CA.
● Set the following values to Pr. 52 "Operation panel main monitor selection", Pr. 774 to Pr. 776
(Operation panel monitor selection), Pr. 992 "Operation panel setting dial push monitor selection",
Pr. 54 "FM/CA terminal function selection" and Pr. 158 "AM terminal function selection" for each
monitor.
Parameter
settings
97
Tab. 5-246: PID monitor function
NOTE Refer to page 5-556 for details on other PID control monitors.
5 - 578
Pr. 178 to Pr. 189
setting
PID control valid
14
terminal
During retry 64
PID P control
72
switchover
Pr. 190 to Pr. 196
setting
Positive
logic
PID upper limit 15
PID lower limit 14
PID forward/
reverse rotation 16
output
During PID
47
control activated
Monitor Minimum
description increment
Dancer main
0.01 Hz
speed setting
Description
When this signal is assigned to the input terminal, PID control is enabled
when this signal is ON.
PID control is switched between forward and reverse action without
changing parameters by turning ON this signal.
Integral and differential values can be reset by turning ON this signal.
Description
Negative
logic
Output when the measured value signal exceeds Pr. 131 "PID upper
115
limit". (Pr. 1143 "Second PID upper limit").
Output when the measured value signal exceeds Pr. 132 "PID lower
114
limit". (Pr. 1144 "Second PID lower limit").
"HI" is output when the output display of the parameter unit is
116 forward rotation (FWD) and "LOW" is output when the display is
reverse rotation (REV) and stop (STOP).
147 Turns ON during PID control.
Monitor range
Terminal Terminal
FM/CA AM
0 to 590 Hz
Remarks
Operation
panel
When outputting from terminals
FM, CA and AM, the full scale value
can be adjusted by Pr. 55
"Frequency monitoring reference".
Parameters