STAR
TUP / TROUBLESHOOTING
5-7
Hardware
and Installation User Manual
5.2.2.6 AUX
Function 10 (Power
-up Restart)
AUX Function 10 clears all discrete and non-retentive control relay image
registers
except those elements that
are forced. Other results of AUX Function
10
depend on the following conditions:
If the battery is low, AUX Function 10 clears the RLL program, I/O
configuration, retentive control relays, WXs, WYs, forced I/O,
V memory
, and all timer
, counter
, and drum preset/current values.
If the battery is low and a program is in RAM, AUX Function 10 puts
the PLC in PROGRAM mode. If the battery is low and an
EPROM/EEPROM with a valid program is installed, AUX Function
10 puts the PLC in RUN mode.
AUX Function 10 downloads presets in either of the following
situations: (a) the battery is good and the download select switch is
set, or (b) the battery is low and a program is in EPROM/EEPROM.
AUX Function 10 also puts the PLC in PROGRAM mode if (a) the
battery
is good and a fatal error is present or (b) the battery is good with
no
error and the previous mode was PROGRAM.
T
able 5-2
lists the effects on memory locations when AUX Functions 10, 1
1, and
12
are executed.
Table 5-2 Effects of Aux Functions on Memory
Locations
Operation
Selected
Discrete Word
Image Register
Control Relay
Retentive Non–Retentive
TMR/CTR
DRUM
Presets
Forced
I/O
AUX
10
Cleared
Note 1
Cleared
Note 2Note 1
AUX 1
1 Cleared Cleared
No
Change
No
Change
No
Change
AUX 12
Cleared Cleared Download
No
Change
Cleared
Input
Cleared
Cleared
Cleared
Output
Note 1
Input
Note 1
Cleared
Output
Cleared
No
Change
No
Change
Note 1 No change if the battery is good; otherwise, cleared.
Note 2 Dependent on user-selectable switch, memory type, and battery condition.
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