Mitsubishi Electric FR-D720S SC EC, Instruction Manual

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Parameter Useful functions
FR-D700 SC EC 6 - 277
6.20.4 Current average value monitor signal (Pr. 555 to Pr. 557)
The average value of the output current during constant speed operation and the maintenance
timer value are output as a pulse to the current average value monitor signal (Y93). The pulse
width output to the I/O module of the PLC or the like can be used as a guideline due to abrasion
of machines and elongation of belt and for aged deterioration of devices to know the mainte-
nance time.
The current average value monitor signal (Y93) is output as pulse for 20s as 1 cycle and re-
peatedly output during constant speed operation.
The above parameters can be set when Pr. 160 = 0.
The above parameters allow its setting to be changed during operation in any operation mode
even if "0" (initial value) is set in Pr. 77 "Parameter write selection".
I002021E
Fig. 6-142: Monitoring the maintenance timer and current average value
Pr. No. Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
555
Current average time 1s 0.1–1s
Set the time taken to average the cur-
rent during start bit output (1s).
57
190/192/
197
503
Restart coasting
time
Output terminal
function selection
Maintenance timer 6.11.1
6.9.5
6.20.3
556
Data output mask time 0s 0–20s
Set the time for not obtaining (mask)
transient state data.
557
Current average value
monitor signal output
reference current
Rated
inverter
current
0–500A
Set the reference (100%) for output-
ting the signal of the current average
value.
Maintenance
time
Parts have
reached their life!
Input unit Output unit
Inverter
PLC