Omron CQM1H - PROGRAM Programming Manual page 411

Special Instructions
C:
15 14 13 12 11
Number of Items in Range
Calculation Units
Conversion to ASCII
Flags
386
the bytes in words R
1
then converted to ASCII and output to the destination words (D and D+1).
The function of bits in C are shown in the following diagram and explained in
more detail below.
Not used. Set to zero.
The number of items within the range (N) is contained in the 3 rightmost digits
of C, which must be BCD between 001 and 999.
The frame checksum of words will be calculated if bit 13 is OFF and the frame
checksum of bytes will be calculated if bit 13 is ON.
If bytes are specified, the range can begin with the leftmost or rightmost byte
of R . The leftmost byte of R
1
When bit 12 is OFF the bytes will be ORed in this order: 1, 2, 3, 4, ....
When bit 12 is ON the bytes will be ORed in this order: 2, 3, 4, 5, ....
The byte frame checksum calculation yields a 2-digit hexadecimal value which
is converted to its 4-digit ASCII equivalent. The word frame checksum calcula-
tion yields a 4-digit hexadecimal value which is converted to its 8-digit ASCII
equivalent, as shown below.
Byte frame checksum value
4A
3 4 4 1
D
ER: Indirectly addressed EM/DM word is non-existent.
(Content of *EM/*DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
The number of items is not 001 to 999 BCD.
to R +N–1. The frame checksum value (hexadecimal) is
1
00
Number of items in range (N, BCD)
001 to 999 words or bytes
First byte (when bit 13 is ON)
1 (ON): Rightmost
0 (OFF): Leftmost
Calculation units
1 (ON): Bytes
0 (OFF): Words
will not be included if bit 12 is ON.
1
MSB LSB
R 1 2
1
R +1 3 4
1
R +2 5 6
1
R +3 7 8
1
Word frame checksum value
4 6 3 1
D
Section 5-28
F10B
3 0 4 2
D+1