Aux Function 10 (Power-Up Restart); Effects Of Aux Functions On Memory Locations - Siemens SIMATIC TI525 Hardware And Installation 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:
D
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.
D
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.
D
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.
Table 5-2 lists the effects on memory locations when AUX Functions 10, 11, and
12 are executed.
Table 5-2 Effects of Aux Functions on Memory
Image Register
Operation
Discrete
Selected
Input Output
AUX 10 Cleared Cleared
AUX 11 Cleared Cleared
AUX 12 Cleared Cleared
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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STARTUP / TROUBLESHOOTING
Locations
Control Relay
Word
Retentive
Input Output
Note 1 Note 1 Note 1
No No No
Change Change Change
Cleared Cleared Cleared
5-7
Forced
I/O
Non–Retentive
Cleared Note 1
No
Cleared
Change
No
Cleared
Change
Hardware and Installation User Manual
TMR/CTR
DRUM
Presets
Note 2
No
Change
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