Delta AS Series Programming Manual page 156

9. The PLC status change log
 SR309–SR390
SR309: The maximum number of PLC status change logs stored in SR309 is 20. Each PLC status change log
occupies 4 registers. The recorded PLC status change actions are numbered, as shown in the following
table.
PLC status change
PLC powered on.
PLC disconnected.
PLC starts to run.
PLC stops.
Default setting in the PLC
SR310: The PLC status change log pointer points to the latest PLC status change log. When the PLC status
changes, the value of the PLC status change log pointer increases by one. The range of pointer values is
0–19. For example, PLC status change log pointer points to the fourth PLC status change log when the
value in SR310 is 3.
The time when the PLC status change actions occur is recorded in SR311–SR390. The flowing table lists the
corresponding functions of these data registers.
Action
Number
number
1 SR311
2 SR315
3 SR319
4 SR323
5 SR327
6 SR331
7 SR335
8 SR339
9 SR343
10 SR347
11 SR351
12 SR355
*Time when the PLC status change occurs
Year Month
SR312 SR312
High byte Low byte
SR316 SR316
High byte Low byte
SR320 SR320
High byte Low byte
SR324 SR324
High byte Low byte
SR328 SR328
High byte Low byte
SR332 SR332
High byte Low byte
SR336 SR336
High byte Low byte
SR340 SR340
High byte Low byte
SR344 SR344
High byte Low byte
SR348 SR348
High byte Low byte
SR352 SR352
High byte Low byte
SR356 SR356
Number
1
2
3
4
5
Day Hour
SR313 SR313
High byte Low byte
SR317 SR317
High byte Low byte
SR321 SR321
High byte Low byte
SR325 SR325
High byte Low byte
SR329 SR329
High byte Low byte
SR333 SR333
High byte Low byte
SR337 SR337
High byte Low byte
SR341 SR341
High byte Low byte
SR345 SR345
High byte Low byte
SR349 SR349
High byte Low byte
SR353 SR353
High byte Low byte
SR357 SR357
Cha p ter 2 De vices
Minute Second
SR314 SR314
High byte Low byte
SR318 SR318
High byte Low byte
SR322 SR322
High byte Low byte
SR326 SR326
High byte Low byte
SR330 SR330
High byte Low byte
SR334 SR334
High byte Low byte
SR338 SR338
High byte Low byte
SR342 SR342
High byte Low byte
SR346 SR346
High byte Low byte
SR350 SR350
High byte Low byte
SR354 SR354
High byte Low byte
SR358 SR358
2 - 1 3 3
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