Omron CJ2 User Manual page 51

Function
Power Memory Protection
Supply
Manage-
ment
Power OFF Detection Time Setting
Power OFF Detection Delay Time
Number of Power Interruptions Counter
Function Blocks
Languages in Function Block Definitions
Debug- Online Editing
ging
Force-Set/Reset
Differentiate Monitoring
Data Tracing
Storing Location of Error when an Error
Occurs
Program Check
Self-diag- Error Log
nosis and
Restora-
CPU Error Detection
tion
User-defined Failure Diagnosis
Load OFF Function
RUN Output
Basic I/O Load Short-circuit Detection
Failure Point Detection
CPU Standby Detection
CJ2 CPU Unit Hardware User's Manual
Holding Area data, DM Area data, Counter Completion Flags, and counter
present values are held even when power is turned OFF. CIO Area, Work Area,
some Auxiliary Area data, and Timer Completion Flags, timer present values,
index registers, and data registers can be protected by turning ON the IOM
Hold Bit in the Auxiliary Area, and by also setting the IOM Hold Bit to "Hold" in
the PLC Setup.
The detection time for power interruptions can be set.
AC power supply: 10 to 25 ms (variable)
DC power supply: 2 to 5 ms (CJ1W-PD022) or 2 to 20 ms (CJ1W-PD025)
The detection of power interruptions can be delayed: 0 to 10 ms
(Not supported by the CJ1W-PD022.)
The number of times power has been interrupted is counted.
Standard programming can be encapsulated as function blocks.
Ladder programming or structured text
The program can be changed during operation (in MONITOR or PROGRAM
mode), except for block programming areas.
Specified bits can be set or reset.
ON/OFF changes in specified bits can be monitored.
The specified I/O memory data can be stored in the trace memory in the CPU
Unit. The triggers can be set.
• The trace data can be uploaded during data tracing using CX-Programmer,
which enables continuously logging the data by constantly uploading the
trace data (trace data uploading during tracing).
• Data tracing can be automatically started when operation is started (i.e.,
when the operating mode is changed from PROGRAM mode to MONITOR or
RUN mode).
The location and task number where execution stopped for a program error is
recorded.
The programs can be checked for items such as no END instruction and
FALS/FAL errors at startup.
A function is provided to store predefined error codes in CPU Unit, error infor-
mation, and time at which the error occurred.
CPU Unit WDT errors are detected.
Errors can be generated for user-specified conditions: Non-fatal errors (FAL)
and fatal error (FALS).
Program section time diagnosis and program section logic diagnosis are sup-
ported (FPD instruction).
This function turns OFF all outputs from Output Units when an error occurs.
This output from the CJ1W-PA205R turns ON while CPU Unit is in RUN mode
or MONITOR mode.
This function provides alarm information from Basic I/O Units that have load
short-circuit protection.
The time and logic of an instruction block can be analyzes using the FPD
instruction.
This function indicates when the CPU Unit is on standby because all Special
I/O Units and CPU Bus Units have not been recognized at the startup in RUN
or MONITOR mode.
1 Overview
Description
1
1-15