160
• The source word exceeds the upper limit of the data memory.
• The destination address is not in the acceptable range.
• The number of transfer words is not within 3 to 6,000 in three-word blocks for
position data and two-word blocks for other data.
• The source word plus the number of transfer words exceed the upper limit of
the data memory.
• The type of the data is one of the following:
• Position data not in BCD.
• Position data with a decimal position not to the right of the rightmost digit,
between the rightmost and second-rightmost digit, between the second-
rightmost and third-rightmost digit, between the third-rightmost and fourth-
rightmost digit, or between the fourth-rightmost and fifth-rightmost digit.
• Position data not within a range of –39,999,999 to 39,999,999.
• A parameter not in BCD.
• A parameter not within the acceptable range.
This flag will be turned OFF when data is transmitted normally.
Signal The Data Transmission Error Flag settings have the following meanings.
Signal Function
↑ An error resulted during data transmission.
↓ Data was retransmitted normally.
Timing Chart
Free
Free
Free
Set
Set
Set
Set
Set
Set
No. of transfer words
(I)
Source word
(I+1)
Destination address
(I+2)
40 ms min.
(Depends on the
volume of data.)
40 ms min.
(Depends on the
volume of data.)
Error results. Data is retransmitted
normally.
Free
Free
Free
Free
Set
Set
Free
Data is prepared in the
PC’s data memory.
Required
information is set
in the expansion
data area.
Transmission Control Bit
(n+1 bit 11)
Transmission Completed Flag
(n+8 bit 06)
Data Transmission Error Flag
(n+8 bit 07)
6-5-33 Word n+8 Bit 08: Reception Completion Flag
This flag will be turned ON regardless of whether data has been received nor-
mally or not.
This flag is used for the timing to turn the Reception Control Bit ON.
This flag will not turn OFF until the Reception Control Bit is turned OFF.
Interface Bit Specifics
Section 6-5
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