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9 Troubleshooting
NX-series Safety Control Unit User’s Manual (Z930)
9-3 Checking for Errors with the Sysmac Studio
9
9-3-4 Error Descriptions
Event name Internal Circuit Error at Safety Output Event code 05230000 hex
Meaning A fault was detected in the internal circuit for the safety output terminal.
Source Depends on where the Sysmac Stu-
dio is connected and the system con-
figuration.
Source details NX Unit Detection timing During refreshing
Error attributes Level Minor fault Recovery Cycle the power
supply to the
Unit.
Log category System
Effects User program Continues. Operation The safety output terminal retains the safe state until the
power supply is cycled.
System-defined
variables
Variable Data type Name
None None None
Cause and
correction
Assumed cause Correction Prevention
The internal circuit for the safety out-
put terminal is faulty.
Cycle the power supply. If the error
occurs again, replace the Unit.
If cycling the power supply restores
normal operation, there may be
excessive noise near the Unit. Imple-
ment noise countermeasures.
A memory error or signal error
occurred due to a transient cause,
such as an excessive noise.
Attached
information
Attached information 1: Terminal number
Precautions/
Remarks
None
Event name I/O Power Supply Voltage Error Event code 6520 0000 hex
Meaning An incorrect I/O power supply voltage was detected.
Source Depends on where the Sysmac Stu-
dio is connected and the system con-
figuration.
Source details NX Unit Detection timing During refreshing
Error attributes Level Minor fault Recovery When cause of
error is removed
Log category System
Effects User program Continues. Operation The Unit continues to operate, but the I/O data retains the
safe states.
System-defined
variables
Variable Data type Name
None None None
Cause and
correction
Assumed cause Correction Prevention
The input power or output power is
not supplied correctly.
Check the following and supply the
rated power.
• Is the power supply voltage within
the specifications?
• Is the wiring correct and not discon-
nected?
• Is 24 V applied to the safety output
terminal and is the safety output
terminal not touching the positive
power supply wire?
If the voltage that is measured is cor-
rect, the Unit may be faulty. In that
case, replace the CPU Unit.
Design the system considering the
corrections that are given on the left.
Attached
information
None
Precautions/
Remarks
None