High-capacity SIMATIC S5 CPU pro S5-155U single-processor et multiprocessor systems
CPU 948-2 exekutat cyclic, time-controlled et interrupt-driven STEP 5 programs in legacy S5-155U automation systems. Its internal program memory, PG interface et optional serial-interface submodules make the installed memory card, rack assignment et archived STEP 5 project central to a reliable replacement.
Controlled CPU exchange: Match the full order number, rack et slot, CPU operating mode, memory-card type et contents, interface submodule, I/O addressing et STEP 5 program before the original controller is removed.
CPU Recovery
In stabilis installationibus S5-155U, 6ES5948-3UA23 praebet platformam processus CPU 948-2 cum 1664 KB RAM internae et subsidio pro executione cyclica, temporata et interruptu-controlata. Hoc modulum in configuratione unius processoris aut multiprocessorum coordinatarum uti potest; ergo functio cunae pars identitatis producti est.
Successus substitutionis servitii non solum programmati utentis conservationem requirit. Carda memoriae, ordinatio DB et DX, configuratio imaginis processus, positiones interfaciei PG et quodlibet modulum interfaciei SI1 vel SI2 adfixum effectum habent in modo quo controller post installationem incipit et communicat.
Conserva software STEP 5, media memoriae et contextum cunae antequam CPU operans perturbetur.
Archivum STEP 5
Salva integrum projectum, informationem symboli, contenta DB et DX et resultatum comparationis in linea dum statio originalis adhuc accessibilis est.
Identitas cardae memoriae
Registra la specie de carta, capacitate, stato de scriber-protection e relation inter le imagine de carta e le programma cargate in le RAM interne.
Rack e rol del processator
Fotografa le fessura e le module adjacente e documenta si le station usa un sol CPU o un arrangement multiprocessor coordinato.
Diagnostica per LED
Le display del CPU e le pila diagnostic assiste a separar fallos de programma, periphericos e interfacies post le labor de service.
STOP e SYS FAULT
Lege le pila diagnostic ante un reset general; un fallo de programma o hardware pote altramente esser substituite per una perdita de probas.
Eventos QVZ e ADF
Compara le fallos pro periphericos mancante e per adressation con le configuration de I/O registrate, le disposition del rack e le limites del imagine de processo.
Canal SI1 e SI2
Quando le communication serial es affectate, confronta le modulo de interfacie installate, le standard de transmission, le parametros e le assignation del connector.
Specificationes
Designatio generis producti
SIMATIC S5 CPU 948-2
Numerus ordinis
6ES5948-3UA23
Systema controlleris
SIMATIC S5-155U
Memoria Usoris
1664 KB RAM interna
Memoria programma esterna
Scheda memoria SIMATIC S5 374
Program Execution
Ciclica, controllata dal tempo e guidata da interruzioni
Interfāciēs Programmātiōnis
interfaccia PG a 15 pin
Interfăță serială opțională
V.24, TTY o RS422/485 tramite sottomodulo interfaccia
Capacità blocco dati
256 DB e 256 DX; 253 di ciascuno liberamente disponibili
How should a maintenance engineer confirm that 6ES5948-3UA23 belongs in the existing S5-155U rack?
Match the full CPU label, rack and slot and determine whether the station is single-processor or multiprocessor. Compare the installed memory card, optional SI1 or SI2 interface and the STEP 5 hardware and I/O configuration before approving the spare.
Q2
What should be backed up before a plant replaces 6ES5948-3UA23 during a shutdown?
Save the complete STEP 5 project, online program and DB or DX contents, memory-card image and diagnostic stack. Also record the rack layout, processor role, interface parameters and normal LED state so commissioning can reproduce the original operating context.
Q3
Why can 6ES5948-3UA23 remain in STOP after the program has been reloaded?
CPU potest manere in STATU STOP si contentum cartae memoriae, assignatio processoris, adressatio I/O aut conditio reinitiationis non congruit cum projecto. Legite stack diagnosticum et indicationes STOP aut SYS FAULT antequam coneris reinitiationem generalem.
Q4
Quomodo technicus potest isolare defectus QVZ recurrentes post installationem 6ES5948-3UA23?
QVZ indicat problemam accessus peripherici magis quam defectum CPU. Utere adressum reportatum ad investigandum arcam, modulum interfaciei et cartam I/O affectam; deinde compara configurationem physicam cum mappa adressuum STEP 5 et imagine processus.
Q5
Quid inspiciendum est cum nexus serialis in 6ES5948-3UA23 non restituitur?
Determina utrum SI1 an SI2 utatur et adapta submodulum interfaciei installatum ad operationem V.24, TTY aut RS422/485. Restitue originalem velocitatem baud, parametres structurae, ordinem pinorum in cable et parametres partis alterius antequam mutes hardware CPU.
Q6
Quando reinitiatio generalis est apta pro 6ES5948-3UA23 post curam?
Hoc tantum utere postquam programma, blocchi dati et diagnosces iam servatae sunt et causa STOP intellecta est. Resettatio generalis memoriam controlleris delent, ideo projectum verificatum onerandum est et introitus/exitus atque communicatio in initio regulato inspicienda sunt.
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