Siemens Simatic S7 Series User Manual

23
Analog
Adjustment
Mode
Switch
SF/DIAG
212-1BB23-0XB0
An analog adjustment is available to increase or decrease
values stored in special memory. This can allow a variable in the
user program to change as the analog adjustment is changed.
CPU 221 and CPU 222 models have one analog adjustment.
CPU 224, CPU 224XP, CPU 224 XPsi, and CPU 226 have two
analog adjustments.
CPU Status Indicators The CPU status indicators display the current CPU mode.
When the CPU is in the RUN mode, the green RUN indicator
is lit. When the CPU is in the STOP mode, the yellow STOP
indicator is lit. The System Fault/Diagnostic (SF/DIAG)
indicator turns red for a system fault and yellow to indicate
certain diagnostic conditions.
SF/D
IAG
CPU Status
Indicators
The I/O status indicators represent the on or off status of
corresponding inputs and outputs. For example, when the CPU
senses an input is on, the corresponding green indicator is lit.
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Siemens Simatic S7 Series Specifications

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.