Omron SYSMAC C1000H, Operation Manual

Page: 43 / 396

35
Name Bit Function
File Memory Unit Error Reset Bit AR 1900 Turned ON from program to reset AR 1903 through AR 1906.
FM Data Transfer Flag AR 1901 ON while FM data is being transferred.
FM Write/Read Flag AR 1902 ON during transfers to FM; OFF during transfers from FM.
FM Blocks Different Error Flag AR 1903 Turns ON if attempt is made to read different types of FM block.
FM write-protected Error Flag AR 1904 Turns ON if attempt is made to write to a write-protected block.
Unsuccessful FM Write Flag AR 1905 Turns ON if a write operation to FM ends unsuccessfully.
FM Checksum Error Flag AR 1906 Turns ON if a checksum error occurs when reading from FM.
File Memory Unit Low Battery Flag AR 1907 Turns ON if the File Memory Unit battery voltage drops.
FM data can be write-protected in units of 250 blocks. To protect any part of
FM from being overwritten, turn ON the Write-protect bits of the blocks to be
protected. These are software protects. There are also switch settings on the
File Memory Unit that can be set to achieve the same purpose.
Bit Blocks
AR 1908 0 to 249
AR 1909 250 to 499
AR 1910 500 to 749
AR 1911 750 to 999
AR 1912 1000 to 1249
AR 1913 1250 to 1499
AR 1914 1500 to 1749
AR 1915 1750 to 1999
The FM Blocks Counter (AR 20) indicates the number of the block that is cur-
rently being transferred. The Remaining FM Blocks Counter (AR 21) indi-
cates the number of blocks remaining to be transferred. Both of these count-
ers provide data in 4-digit BCD and are refreshed each time transfer of a
block is completed.
Bits
15 to 12 11 to 08 07 to 04 03 to 00
10
3
10
2
10
1
10
0
3-5-6 On-line Removal Bits
AR 22 indicates when a Unit is being removed on-line and what words are
allocated to the Unit. AR 22 is refreshed every cycle while a Unit is being re-
moved on-line.
The On-line Removal Flag, AR 2215 turns ON when an on-line removal op-
eration is in progress. The On-line Removal First Word Indicator, AR 2200
through AR 2211, indicates the first word allocated to the Unit that is being
removed. This value is in 3-digit BCD.
The Number of Words Indicator, AR 2212 through AR 2214, indicates in bi-
nary the number of words allocated to the Unit that is being removed.
3-5-7 Power-off Counter
AR 23 provides in 4-digit BCD the number of times that the PC power has
been turned off. This counter can be reset as necessary using the PV
Write-protect Bits
Block Counters
AR Area
Section 3-5