Inverter Settings; Setting The Communications Conditions - Omron SYSDRIVE 3G3JV User Manual

Communications
7-2

Inverter Settings

7-2-1 Setting the Communications Conditions

H Communications Time-over Detection Selection (n68)
• This parameter is used for monitoring the communications system.
• The set value in the parameter determines whether communications time-over detection will be per-
formed with "CE" displayed if there is an interval of more than 2 s between normal communications.
The method to process the detected communications time-over is also determined according to the
set value in the parameter.
• When a control signal (the RUN command, forward/reverse rotation command, or an external fault
signal) is input into the Inverter through communications, be sure to set n68 to 0, 1, or 2. Then the
system will stop in the case of a time-over detection.
If there is a communications failure, no control input will be operable. It will be, however, impossible to
stop the Inverter if n68 is to 4 or 3.
Use a host program that monitors how the Inverter handles all control input signals, for example, so
that there will be no interval of more than 2 s between communications.
n68
RS-422A/485 Communications
Time-over Detection Selection
Setting 0 to 4
range
Set Values
Value
0 Detects a time-over and fatal error and coasts to a stop (See note 1.)
1 Detects a time-over and fatal error and decelerates to a stop in deceleration time 1 (See note 1.)
2 Detects a time-over and fatal error and decelerates to a stop in deceleration time 2 (See note 1.)
3 Detects a time-over and nonfatal error warning and continues operating. The warning is
canceled when the communications return to normal. (See note 2.)
4 No time-over is detected.
Note 1. The fatal error is canceled with error reset input.
Note 2. The nonfatal error warning is canceled when the communications returns to normal.
H Communications Frequency Reference/Display Unit Selection (n69)
• Set this parameter to the unit of frequency reference and frequency-related values to be set or moni-
tored through communications.
• This unit is for communications use only and independent from the units of setting made through the
Digital Operator.
n69
RS-422A/485 Communications
Frequency Reference/Display Unit
Selection
Setting 0 to 3
range
Register 0144 Hex
Unit of 1
setting
Description
Register 0145 Hex
Unit of 1
setting
Chapter 7
Changes during No
operation
Default setting 0
Changes during No
operation
Default setting 0
7-5