Omron CS1W-MC221 -, Operation Manual

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Interface Specifics Section 5-4
ON for read error with the IORD instruction. (Refer to 4-2 IOWR and IORD
Specifications for details on IORD.)
Timing Chart Refer to the timing chart for the IOWR instruction in 4-2 IOWR and IORD
Specifications .
Data Reception Error Flag
The Data Reception Error Flag will turn ON when a fatal error occurs while
receiving position data from the MC Unit using the IOWR instruction in the
ladder diagram. (The IOWR instruction is used to transfer large quantities of
data using a command area.)
This flag will be turned ON for the following errors.
The = Flag will turn ON for the following errors, but the Error Flag in the PLC
Interface Area will turn ON and the read will not be completed normally.
• Illegal data is read (i.e., memory is corrupted).
Timing Chart Refer to the timing chart for the IOWR instruction in 4-2 IOWR and IORD
Specifications .
Flash Memory Write Flag
The Flash Memory Write Flag turns ON while writing data to the MC Unit as a
result of executing a Flash Memory Write Command (17D4 or 17D5 hex) for
the Command Area using the IOWR instruction in the ladder diagram.
The Error Flag (n+10, 14/n+18, 14) will turn ON if an error occurs while writing
to flash memory.
The Flash Memory Write Flag will turn OFF when the write to flash memory
ends normally.
Signal Meaning
1 Data reception has started.
↓
The data reception has been completed normally or an error occurred
during the reception.
Word Bit I/O Valid mode
MC221 MC421
n+10 n+18 09 Input ---
Signal Meaning
1 An error occurred during data reception.
↓
Data was retransmitted and received normally.
Word Bit I/O Valid mode
MC221 MC421
n+10 n+18 10 Input ---
Signal Meaning
1 A write has been started to flash memory.
↓
The write to flash memory has been completed normally or an error
occurred during the write (i.e., the Error Flag has turned ON).