CERUS CI-007-P2 Installation, Programming Operation, & Maintenance Manual Download Page 90

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Chapter 6 - Parameter Description

6-23

6.5 Input/Output Group [I/O]

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The I/O-00 parameter allows jumping to any
parameter in I/O group without scrolling to it. Press
[ENTER] key and input desired parameter code by
using [SHIFT] and [UP]/[DOWN] keys.
When [ENTER] key is pressed again, the desired
parameter will be on the display.

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These parameters are available when SET-10 is set
to V1, V1S, or V1+I or PID control is enabled with
voltage 0-10VDC feedback. They are used to scale
and adjust the analog voltage input parameters.

I/O-01

provides a noise filtering time adjustment.

The voltage 0-10VDC input is very sensitive to
electrical noise and can create some speed control
problems at high noise levels. The VFD typically
follows a speed reference up to maximum speed but
sometimes does not follow it back to minimum
speed because of AC noise in the speed reference
signal. If increasing the filtering time does not fix
this problem, this indicates that the noise level is
too high because of system wiring or layout
problems. Check if analog input V1 cable is
shielded, shield is connected to system ground, and
analog cable is spaced from input power and motor
wires.

I/O-02

should be set to the minimum analog

voltage signal value. For example, if voltage signal
from BMS is 2-10VDC, I/O-02 should be set to
2VDC. The default value is 0VDC and can be
changed from 0 to I/O-04.

I/O-03

should normally be set to 0Hz.

Do not set

it to any frequency to be used as the

minimum speed limit because this changes the
speed reference control curve. The default value is
0Hz and can be changed from 0 to VFD maximum
Frequency. (Low limits should be programmed on
SET-13 or SET-27)

I/O-04

should be set to the maximum analog

voltage signal value. For example, if voltage signal
from BMS is 0-5VDC, I/O-04 should be set to
5VDC. The default value is 10VDC and can be
changed from 0 to 12VDC.

I/O-05

should normally be set to 50Hz or 60Hz.

Do not set

it to any Frequency to be used as

maximum speed limit because this changes the
speed reference control curve. The default value is
60Hz and can be changed from 0 to VFD
Maximum Frequency. (High limits should be
programmed on SET-14 or SET-28)

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These parameters are available when SET-10 is set
to I or V1+I or PID control is enabled with current
4-20mA feedback. They are used to scale and
adjust the analog current input parameters.

I/O-06

provides a noise filtering time adjustment.

The current input is less sensitive to electrical noise
but it can create some speed control problems at
high noise levels. The VFD typically follows a
speed reference up to maximum speed but
sometimes does not follow it back to minimum
speed because of AC noise in the speed reference
signal. If increasing the filtering time does not fix
this problem, this indicates that the noise level is
too high because of system wiring or layout
problems. Check if analog input I cable is shielded,
shield is connected to system ground, and analog
cable is spaced from input power and motor wires.

I/O-07

should be set to the minimum analog current

signal value. For example, if current signal from
BMS is 4-20mA, I/O-07 should be set to 4mA. The
default value is 4mA and can be changed from 0 to
20mA.

I/O-08

should normally be set to 0Hz.

Do not set

it to any frequency to be used as the

I/O-09

should be set to the maximum analog

I/O Jump Code
00 28

I/O V1 Freq y2

05 60.00 Hz

I/O V1 Filter

01 200 ms

I/O V1 Volt x1