External Analog Input Disconnection Detection; Network Error - Omron JX User Manual

4-2 Function Mode

External Analog Input Disconnection Detection

•Outputs a signal if an error is detected in the external analog inputs (O, OI).
Data
06
Available output terminals
Required settings
•The disconnection detection signal is output if the frequency reference of the external analog input
remains below the starting frequency for 500 ms.
•The signal stops 500 ms after the frequency reference has exceeded the starting frequency.
4
•Helps detect disconnection when a frequency reference is issued from the external analog inputs
(O, OI) with the frequency reference selection set to the terminal (A001 = 01).
•Enabled only when the external analog inputs (O, OI) are selected.
Example 1: Disabled in multi-step speed operation even when the frequency reference is set to
Example 2: Disabled even when the AT terminal selection is set to the O/volume selection

Network Error

This function detects and outputs a network error during RS485 ModBus communication.
•The error is output during RS485 ModBus communication if the next signal does not come even
after the specified time period in C077.
Data
08
Available output terminals
Required settings
Master
Slave
Watchdog timer
NDc
Alarm
[C076] = 00 or 01
4-58
Symbol Function name
Dc Disconnection detection
the external analog input (A001 = 01).
(A005 = 02) or OI/volume selection (A005 = 03) since the frequency reference is set
on the Digital Operator (volume) with the AT terminal turned on.
Starting
frequency
0Hz
External analog
OFF
input disconnection
detection (DC)
Symbol Function name
NDc Network error
[C077]
Status
ON The Inverter is in trip status.
OFF The Inverter is normal.
11-CM2, AL2-AL0 (or AL1-AL0)
C021, C026, A001, A005
External analog input
frequency reference (O, OI)
ON
500 ms 500 ms
Status
ON The communication watchdog timer times out.
OFF Normal
11-CM2, AL2-AL0 (or AL1-AL0)
C021, C026, C077
Time out
Description
Description