Mitsubishi Electric FR-A800, Instruction Manual

Page: 741 / 1042

Parameters (A) Application parameters
FR-A800 5 - 561
NOTES After changing the Pr. 267 setting, check the voltage/current input selection switch. Incorrect set-
ting may cause a fault, failure or malfunction. (Refer to page page 5-389 for the setting.)
If the RH, RM, RL, or REX signal (multi-speed operation), or JOG signal is input in regular PID con-
trol, PID control is interrupted. However, at dancer control, these signals are treated as main speed
commands, so PID control is continued.
During dancer control, Pr. 44 and Pr. 45 "Second deceleration time" is the parameter for setting the
acceleration/deceleration time for the main speed command. This function does not function as a
second function.
When the switchover mode is set by setting "6" to Pr. 79, dancer control (PID control) is invalid.
When dancer control is selected, the speed command of terminal 4 by the AU signal is invalid.
The acceleration/deceleration action of the main speed command is the same as that when the
frequency is increased or decrease by analog input. For this reason,
●
The SU signal sometimes stays ON even if operation is turned ON/OFF by the start signal. (The
constant-speed status is maintained.)
●
The DC brake operation start frequency when the start signal is turned OFF is not Pr. 10 but the
smaller value between Pr. 13 and 0.5 Hz.
●
The set frequency monitor is the value "main speed c PID control" which is con-
stantly changing.
With the main speed setting frequency setting, acceleration/deceleration is performed for the
acceleration/deceleration time set at Pr. 44 and Pr. 45, and with the output frequency setting,
acceleration/deceleration is performed for the acceleration/deceleration time set at Pr. 7 and Pr. 8.
For this reason, with the output frequency, when the time set at Pr. 7 and Pr. 8 is longer than the
time set at Pr. 44 and Pr. 45, acceleration/deceleration is performed for the acceleration/decelera-
tion time set at Pr. 7 and Pr. 8.
The limit of the integral term is the smaller of 100% and the value after conversion of the straight
line after interpolation of Pr. 1 "Maximum frequency" by Pr. 902 and Pr. 903 to the PID manipulated
amount. Note, however, that the lower limit frequency limits the output frequency, but does not
restrict the action of the integral item.
Parameters referred to
Pr. 57 Restart coasting time => page 5-562
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. 561 PTC thermistor protection level => page 5-292
C2 (Pr. 902)
to C7 (Pr. 905)
Frequency setting voltage (current) bias/gain => page 5-401