161
No data can be received when this flag is ON.
Signal The Reception Completion Flag settings have the following meanings.
Signal Function
↑ Data has been received.
↓ No data is being received.
Note Refer to 6-5-12 Word n+1 Bit 12: Reception Control Bit.
6-5-34 Word n+8 Bit 09: Data Reception Error Flag
This flag will be turned ON when one of the following errors results during data
reception.
• The number of transfer words, source address, or destination word is not BCD.
• The source address is not in the acceptable range.
• The destination word exceeds the upper limit of the data memory.
• 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 destination word plus the number of transfer words exceed the upper limit
of the data memory.
• The destination word plus the number of transfer words are not within the
acceptable range.
Example: If the Reception Control Bit is turned ON to read 600-word position
data beginning with position data number 1,900, the last position
data number exceeds the upper limit 1,999 (i.e., 1,900 + 600/3 =
2,100)
This flag will be turned OFF when data is received normally.
Signal The Data Reception Error Flag settings have the following meanings.
Signal Function
↑ An error resulted during data reception.
↓ Data was retransmitted and received normally.
Timing Chart
Free
Free
Free
Set
Set
Set
Set
Set
Set
No. of transfer words
(I+3)
Source address
(I+4)
Destination word
(I+5)
Reception Control Bit
(n+1 bit 12)
40 ms min.
(Depends on the
volume of data.)
40 ms min.
(Depends on the
volume of data.)
Reception
Completed Flag
(n+8 bit 08)
Data Reception Error
Flag (n+8 bit 09)
Error results. Data is retransmitted
and received normally.
Free
Free
Free
Required information
is set in the expansion
data area.
Interface Bit Specifics
Section 6-5
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