The Integral Real-Time Clock S5-100U
Operating Hours Counter Flags
Table 12-7. Significance of the Operating Hours Counter Flags Bits 8, 9, and 10 of the
Status Word
Bit Number Signal State Meaning
8
1 Error in setting entry
0
1
0
1
0
9
10
No error in setting entry
Enable the operating hours counter
Disable the operating hours counter
Transfer the settings
Do not transfer the settings
Prompt Time Flags
Table 12-8. Significance of the Prompt Time Flag Bits 12, 13, and 14 of the Status Word
Bit Number Signal State Meaning
12
1 Error in setting entry
0
1
0
1
0
13
14
No error in setting entry
The set prompting time is reached
The set prompting time is not reached
Transfer the settings
Do not transfer settings
The operating system requires bit numbers 6, 7, 11, and 15. You can not use these bits.
Scanning the Status Word
In a data block, you can use the “P <data word number> <bit number>” operation to scan the
individual bits of a data word. In the flag area, you can scan the individual bits if you enter the
<byte address> and the <bit number>.
Example: The status word is stored in DW13. You are checking to see if the set prompt time has
been reached. The “P D 13.13” instruction triggers a scan. If the status word is stored
in FW12, then the same scan would be “A F 12.5”.
Backup of the Hardware Clock
If there is a backup battery, the clock continues to run even after Power OFF. If the programmable
controller does not have a backup battery, the clock values will be set at “April 1, 1992, 12.00.00
o’clock, weekday: 4” when the clock is initialized after a Power ON. The default is the 24-hour time
mode. You should install a battery only during Power ON; otherwise, you would lose the clock data.
12-14
EWA 4NEB 812 6120-02
To Next Page
Loading...
