Siemens Simatic S7 Series User Manual

36
AND Operation Each rung or network on a ladder represents a logic operation.
The following programming example demonstrates an
AND
operation. Two contact closures and one output coil are placed
on network 1. They are assigned addresses I0.0, I0.1, and Q0.0.
Note that in the statement list a new logic operation always
begins with a load instruction (LD). In this example I0.0 (input 1)
and (A in the statement list) I0.1 (input 2) must be true in order
for output Q0.0 (output 1) to be true. This same logic is also
shown in a function block diagram.
The following truth table represents the state of the output for
each combination of input states.
I0.0 I0.1
Q0.0
0
0
1
1
0
1
0
1
0
0
0
1
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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.