Mitsubishi Electric fr-e700 series, Инструкция по эксплуатации

Страница: 478 / 608

Useful functions Parameter
6 - 324
6.21.4 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 maintenance time.
The current average value monitor signal (Y93) is output as pulse for 20 s as 1 cycle and repeatedly out-
put during constant speed operation.
The above parameters can be set when Pr. 160 "User group read selection" = 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".
I001940E
Fig. 6-168: 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 1 s 0.1–1.0 s
Set the time taken to average the current during
start bit output (1 s). 57
190–192
503
Restart coasting time
Output terminal
function selection
Maintenance timer 6.12.1
6.10.5
6.21.3
556
Data output mask time 0s 0.0–20.0 s
Set the time for not obtaining (mask) transient
state data.
557
Current average value
monitor signal output
reference current
Rated inverter
current
0–500 A
Set the reference (100%) for outputting the
signal of the current average value.
Maintenance
time
Parts have
reached their life!
Input unit Output unit
Inverter
PLC