Mitsubishi Electric FR-A800, Instruction Manual

Page: 739 / 1042

Parameters (A) Application parameters
FR-A800 5 - 559
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
●
Output signal
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.
Signal Function
Pr. 178 to Pr. 189
setting
Description
X14
PID control valid
terminal
14
When this signal is assigned to the input terminal, PID control is enabled
when this signal is ON.
X64 During retry 64
PID control is switched between forward and reverse action without
changing parameters by turning ON this signal.
X72
PID P control
switchover
72 Integral and differential values can be reset by turning ON this signal.
Tab. 5-239: Input signals and parameter setting
Signal Function
Pr. 190 to Pr. 196
setting
Description
Positive
logic
Negative
logic
FUP PID upper limit 15 115
Output when the measured value signal exceeds Pr. 131 "PID upper
limit". (Pr. 1143 "Second PID upper limit").
FDN PID lower limit 14 114
Output when the measured value signal exceeds Pr. 132 "PID lower
limit". (Pr. 1144 "Second PID lower limit").
RL
PID forward/
reverse rotation
output
16 116
"HI" is output when the output display of the parameter unit is
forward rotation (FWD) and "LOW" is output when the display is
reverse rotation (REV) and stop (STOP).
PID
During PID
control activated
47 147 Turns ON during PID control.
Tab. 5-240: 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.
Parameter
settings
Monitor
description Minimum
increment
Monitor range
Remarks
Terminal
FM/CA
Terminal
AM
Operation
panel
97
Dancer main
speed setting
0.01 Hz 0 to 590 Hz
When outputting from terminals
FM, CA and AM, the full scale value
can be adjusted by Pr. 55
"Frequency monitoring reference".
Tab. 5-241: PID monitor function
NOTE Refer to page 5-537 for details on other PID control monitors.