Siemens Simatic S7 Series System Manual

Table of contents
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
7
6 PLC device configuration ....................................................................................................................... 115
6.1 Configuring the operation of the PLC system ....................................................................... 115
6.1.1 System block ......................................................................................................................... 115
6.1.2 Configuring communication .................................................................................................. 117
6.1.3 Configuring the digital inputs ................................................................................................ 119
6.1.4 Configuring the digital outputs .............................................................................................. 121
6.1.5 Configuring the retentive ranges ........................................................................................... 122
6.1.6 Configuring system security .................................................................................................. 124
6.1.7 Configuring the startup options ............................................................................................. 128
6.1.8 Configuring the analog inputs ............................................................................................... 129
6.1.9 Reference to the analog inputs technical specifications ....................................................... 131
6.1.10 Configuring the analog outputs ............................................................................................. 132
6.1.11 Reference to the analog outputs technical specifications..................................................... 133
6.1.12 Configuring the RTD analog inputs ....................................................................................... 134
6.1.13 Configuring the TC analog inputs ......................................................................................... 139
6.1.14 Configuring the RS485/RS232 CM01 communications signal board ................................... 143
6.1.15 Configuring the BA01 battery signal board ........................................................................... 144
6.1.16 Clearing PLC memory........................................................................................................... 145
6.1.17 Creating a reset-to-factory-defaults memory card ................................................................ 147
6.2 High-speed I/O ...................................................................................................................... 148
7 Program instructions .............................................................................................................................. 149
7.1 Bit logic ................................................................................................................................. 149
7.1.1 Standard inputs ..................................................................................................................... 149
7.1.2 Immediate inputs ................................................................................................................... 151
7.1.3 Logic stack overview ............................................................................................................. 152
7.1.4 STL logic stack instructions .................................................................................................. 154
7.1.5 NOT ...................................................................................................................................... 156
7.1.6 Positive and negative transition detectors ............................................................................ 157
7.1.7 Coils: output and output immediate instructions ................................................................... 158
7.1.8 Set, reset, set immediate, and reset immediate functions .................................................... 159
7.1.9 Set and reset dominant bistable ........................................................................................... 160
7.1.10 NOP (No operation) instruction ............................................................................................. 161
7.1.11 Bit logic input examples ........................................................................................................ 162
7.1.12 Bit logic output examples ...................................................................................................... 163
7.2 Clock ..................................................................................................................................... 165
7.2.1 Read and set real-time clock ................................................................................................ 165
7.2.2 Read and set real-time clock extended ................................................................................ 167
7.3 Communication ..................................................................................................................... 170
7.3.1 GET and PUT (Ethernet) ...................................................................................................... 170
7.3.2 Transmit and receive (Freeport on RS485/RS232) .............................................................. 178
7.3.3 Get port address and set port address (PPI protocol on RS485/RS232) ............................. 190
7.3.4 Get IP address and set IP address (Ethernet) ...................................................................... 191
7.4 Compare ............................................................................................................................... 192
7.4.1 Compare number values ...................................................................................................... 192
7.4.2 Compare character strings ................................................................................................... 196
7.5 Convert ................................................................................................................................. 198
7.5.1 Standard conversion instructions .......................................................................................... 198
7.5.2 ASCII character array conversion ......................................................................................... 202

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.