Mitsubishi Electric Freqrol-A100 Instruction Manual page 206

PI control
Battery backup for
programmed operation
I
Pulse train input
Function, Application, Etc.
PI control function is required when process control,
e.g. flow rate, air volume or pressure, is carried out
by the inverter.
The set value can be set from any of terminal 2, 1
or parameter unit. The measured value (feedback
signal) is input to terminal 4 by a 4 to 20mA DC
current signal.
Allows the timer to be battery backed for pro-
grammed operatlon. If a power failure occurs, auto-
matic operation can be continued after the power is
restored. (Programmed operation is standard in the
inverter. See Pr.
87.)
Group selection and time-out
output signal for the programmed operation are in-
corporated.
Allows a pulse train signal to be used as a speed
command input to the inverter.
Rating, Etc.
PI control range: proportional band 1 to 1000%
integral time 0.1 to 3600 seconds
Output signal: high limit, low limit, during forward
rotation, during reverse rotation
.
Battery life: 10. years (lithium battery)
I
Permissible power failure time:
max. 18 hours when Pr. 200=0.2 (seconds selected)
Max. 30 days when Pr. 200=1.3 (minutes selected)
Max. permissible number of pulses: 100KPPS or less
lnput interface: Open collector system
Input voltagelcurrent: 24VDC, lOmA
Information on programmable controller link function
When the FR-EPC is used to perform programmable controller link (PC link) operation, operation can
also be performed under the control of the external terminal signal according to the conditions set in
Pr. 123 (operation command control place selection) and Pr. 124 (speed command control place
selection).
.
Control dace selection function
Pr. 123 and Pr. 124 may be set for both the PC link and PU
[Explanation of the table] EXT: Operation from external terminal is only valid.
PC: Operation from PC link is only valid.
EIT: Operation from either external terminal or PC link is valid.
-
: Operation from neither external terminal nor PC link is valid.
AUX: Operation from external terminal signal is only valid when "1" is set
in Pr. 28 (multi-speed input compensation).
*1: Operation from PC link is disabled.
*2: From PC link, running frequency is changed (when "speed command"
setting is "PC").
*3: From PC link, inverter reset command is used.
Note: When the external terminal ("1") is selected in Pr. 124 (speed command control place
selection), command control in bit
0
is made valid as the current input selection (AU). To use
the conventional program, note the setting of bit
0.