Omron CS1W-MC221 -, Operation Manual

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Automatic Loading Section 6-16
When debugging, check the Error Flags from the ladder program.
Transfer Data (DM)
6-16-2 Related Bits in the PLC Interface Area
For details on the PLC Interface Area, refer to 5-3 PLC Interface Area .
Autoloading Flag This flag turns ON when the data for the specified job number begins to be
downloaded as the result of executing the IOWR instruction. It turns OFF
when all of the data for that job number has been downloaded.
Autoloading Error Flag
and Error Reset Bit The Autoloading Error Flag turns ON when an error occurs during automatic
loading. When the Autoloading Error Reset Bit is turned ON, the Autoloading
Error Bit will turn OFF. Unless the cause of the error has been cleared, how-
ever, the Autoloading Error Flag will turn back ON again the next time the
automatic loading is executed.
If communications are not restarted by the time the Autoloading Time Up set
in the Unit parameters has elapsed, an error will occur and the Autoloading
Execution condition
(Work bit)
(Work bit)
(Work bit)
This is the special address (6104) with the function of
specifying the job number for automatic loading.
17D8 Hex (6104)
Specifies the first source word.
Specifies the destination unit number 0 and specifies
two words of data to be transferred.
DIFU R1
R3
R2
Job number: 100
Bit name Model Words Bit Description
Autoloading Error
Reset Bit MC421
MC221 n
n 05
↑
: Error reset for automatic loading
Autoloading Flag MC421
MC221 n+10
n+18 04
↑
: Automatic loading begun.
↓
: Automatic loading finished.
Autoloading Error Flag MC421
MC221 n+10
n+18 05
↑
: Error occurred during automatic loading
↓
: Automatic loading error reset turned ON.
Job number
Automatic loading command
(IOWR instruction)
Autoloading Flag
(n+10, 04; n+18, 04)
When automatic loading is completed normally.