Name: Siemens Simatic S7 Series
Brand: Siemens
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Special memory (SM) and system symbol names

D.18 SMW100-SMW114 System alarms

S7-200 SMART

684 System Manual, 09/2015, A5E03822230-AC

D.18

SMW100-SMW114 System alarms

Special memory words SMW100-SMW114 provide alarm and diagnostic error codes for

CPU, SB (signal board), and EM (expansion modules).

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General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.