Mitsubishi Electric FR-A800, Instruction Manual

Page: 722 / 1042

(A) Application parameters Parameters
5 - 542
NOTES Even if the X14 signal is ON, PID control is stopped and multi-speed or JOG operation is performed
when the RH, RM, RL, or REX signal (multi-speed operation) or JOG signal (JOG operation) is input.
PID control is invalid under the following settings.
Pr. 79 "Operation mode selection" = "6" (Switchover mode)
Note that input to the terminal 1 is added to the terminals 2 and 4 inputs. For example when
Pr. 128 = "20 or 21", the terminal 1 input is considered as a set point and added to the set point of
the terminal 2.
To use terminal 4 and 1 inputs in PID control, set "0" (initial value) to Pr. 858 "Terminal 4 function
assignment" and Pr. 868 "Terminal 1 function assignment". When a value other than "0", PID con-
trol is invalid.
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.
When PID control is selected, the minimum frequency becomes the frequency of Pr. 902 and the
maximum frequency becomes the frequency of Pr. 903.
(The Pr. 1 "Maximum frequency" and Pr. 2 "Minimum frequency" settings also are valid.)
During PID operation, the remote operation function is invalid.
When control is switched to PID control during normal operation, the frequency during that oper-
ation is not carried over, and the value resulting from PID calculation referenced to 0 Hz becomes
the command frequency.
Parameters referred to
Pr. 59 Remote function selection => page 5-247
Pr. 73 Analog input selection => page 5-389
Pr. 79 Operation mode selection => page 5-263
Pr. 178 to Pr. 189 (input terminal function selection) => page 5-422
Pr. 190 to Pr. 196 (output terminal function selection) => page 5-361
Pr. 290 Monitor negative output selection => page 5-341
C2 (Pr. 902) to
C7 (Pr. 905)
Frequency setting voltage (current) bias/gain => page 5-401
PID set point
Frequency command
during normal operation
Normal operation
PID operation
ON
Frequency
command
PID action
Normal operation
Operation when control is switched to PID control during normal operatio