Siemens

Simatic S7-300

Introduction SIMATIC S7-300: The Modular Controller for innovative system solutions in the manufacturing industry SIMATIC S7-300 is the best-selling controller of Totally integrated Automation spectrum with a host of successful reference applications worldwide for the most varied industrial sectors. Manufacturing Engineering Automotive industry General machine construction Special-purpose machine manufacturing Standard mechanical equipment manufacture, OEMs Plastic processing Packaging industry Food, beverages and tobacco industries Process engineering The S7-300 enables space-saving and modular configurations. In addition to the modules only a DIN rail is required for hooking in the modules and screwing them into place. If the automation task requires more than 8 modules, the central controller (CC) of the S7-300 can be expanded using expansion units (EUs) Up to 32 modules can be used in the central rack and up to 8 per expansion unit. Interface Modules (IMs) handle communication between the individual racks autonomously. In a single-tiered configuration, this results in a maximum configuration of 256 I/O, and in multi-tiered configurations up to 1024 I/O. In distributed configurations with PROFIBUS DP, 65536 I/O connections are possible. The slots are freely addressable, that is, there are no slot rules.

Module range

SIMATIC S7-300

Signal Modules

Signal modules are the interface of SIMATIC S7-300 to the process. A host of different digital and analog modules provide exactly the inputs/outputs required for each task.

Digital and analog modules differ as regards the number of channels, voltage and current ranges, electrical isolation, diagnostics and alarm functions, etc.

Digital input			Analog input
Module	Voltage range	Number of channels	Module	Measuring range	Resolution	Number of channels
SM 321	24 VDC	16, 32	SM 331	Voltage	Up to 16 bits	2, 8
SM 321	48-125 V DC	16	SM 331	Current (also HART)	Up to 16 bits	2, 8
SM 321	24/48 VUC	16	SM 331	Resistance	Up to 16 bits	1, 4, 8
SM 321	120/230 V DC	8, 16, 32	SM 331	Thermocouple elements	Up to 16 bits	2, 8
			SM 331	Resistance The	Up to 16 bits	1, 4, 8

Digital inputs/out			Analog input/output
Module	Voltage range	Number of channels	Module	Measuring range	Resolution	Number of channels
SM 323	24 VDC	8 or 16 DI and DO	SM 334	Voltage	Up to 13 bits	2, 4
SM 327	24 V DC	8 DI and 8 DX (parameterized as input or output)	SM 334	Current (also HART)	8 bits	4
			SM 334	Resistance	13 bits	4
			SM 334	Resistance thermocouple	15 bits	4
			SM 335	Voltage	14 bits	4
			SM 335	Current	14 bits	4

Digital output				Analog output
Module	Voltage range	Current range	Number of channels	Module	Measuring range	Resolution	Number of channels
SM 322	24 VDC	0.5A	8, 16	SM 332	Voltage	Up to 16 bits	2, 4, 8
SM 322	24 V DC	2A	8	SM 332	Current (also HART)	Up to 16 bits	2, 4, 8
SM 322	48-125 V DAC	1.5A	8
SM 322	120/130 V AC	1A	8, 16, 32
SM 322	120/130 VAC	2A	8
SM 322	UC (relay)	0.5A-5A	8, 16

Special Functions Module & Communications Processors

SIMATIC S7-300

Point-to-Point link via communications processors (CPs) is an extremely powerful and low cost alternative to bus-systems. The advantage of point-to-point links over bus systems is especially pronounced when only a few (RS485) devices are to be connected to the SIMATIC S7.

The CPs can also economically connect third party systems to the SIMATIC S7. Thanks to the great flexibility of the CPs different physical transmission media, speeds or even customized transmission protocols can be implemented.

The configuring data are stored in a system data block stored in the CPU. When modules are replaced, the new module is therefore immediately ready for use.

Technical data Point-to-Point Link
Application	Low-cost entry version	Powerful computer conncetion, Loadable protocols
Transmision rate	Low (19200 bit/s)	High (76800 bit/s)
Loadable protocols		MODBUS master (6ES7340-1AA.), MODBUS slave (6ES7340-1AB.), Data highway (6ES7340-1AE.)
Module	CP 340	CP 341
Order No. Group: 6ES7	340-1.	341-1.
Physical transmission media
RS 232C (V.24)	CP 340-1A	CP 341-1A
20 mA (TTY)	CP 340-1B	CP 341-1B
RS 422/485 (X.27)	CP 340-1C	CP 341-1C
Integrated transmission protocols
ACII	■	■
Printer driver	■	■
3964 (R)	■	■
RK 512		■

Technology

Function m,odulesc are intelligent modules that independently
execute the technoogical tasks and thus reduce the load on the
CPU. They are used when a high level of accuracy and dyna,ic
response is required.

Function modules
Tchnological function	Channels / Axes	Modue
Counting, measuring, proportioning position detection (incremental)	1	FM350-1
Counting, measuring, proportining	8	FM 350-2 ³⁾
Cam controls	1	FM 352
High-speed dinary logic operations	1	FM 352-
PID control (continuous)	4	FM 355C
PID control (step/impulse)	4	FM 355S
Temperature control (continuous)	4	FM 355-2C
Temperature control (step/impulse)	4	FM 355-2S
Positioning (rapid travers/creep feed)	2	FM 351
Position detection (SSI)	3	FSM 338
Positioning (with stepper drives)	1	FM 353
Positioning (with servo drives)	1	FM 354
Positioning, path control, interpolation, synchronization	4	FM 357-2
Isochronous connection of drives via PROFIBUS	4	IM 174

Communication

Commnuication processors are used for connecting S7-300
to the different dus systems / communication networks as well
for point-to-point link.

Communcations processors
Bus system /communication network	Module
AS-Interface (mater) ²⁾	CP 343-2 CP343-2 P
PROFIBUS DP ²⁾	CP 342-5
	CP342-5 FO (for fiber-optic conductors)
PROFIBUS FMS ²⁾	CP 343-5
PROFINET / Industrial Ethernet ²⁾	CP 343-1 Lean
	CP 343-1
	CP 343-1 Advanced (with IT functionnality)
Point-to-point link	CP 340 ⁴⁾ CP 341 ⁴⁾
WAN	TIM 3V-IE TIM 3V-IE Advanced

Technical data for technology CPUs

SIMATIC S7-300

Technollogy CPU	CPU 315T-2 DP	CPU 317T-2 DP
Dimensions	160 x125 x 130	160 x 125 x 130
Required front connector	1 x 40-pin	1 x 40-pin
Order No. group: 6ES7	315-6TG.	317-6TJ.
Momory
RAM	128 KB	512
Instructions	42 K	170 K
Processing times
Bit memory	0,1 µs	0,05 µs
Word operation/fixed-point operation/floating-point operations	0,2/2/3 µs	0,2/0,2/1 µs
Bit memories/timers/counters
Bit memory	4096 bytes	4096 bytes
S7 timers/S7 counters	256/256	512/512
IEC timers/IEC counters	■	■
Address areas
I/O address area	2048/2048 bytes	8192/8192 bytes
Process I/O image	128/128 byte	256/256 bytes
Digital channels (central)	256	256
Analog channels (central)	64	64
DP interface
Integrated I/O	■/■	■/■
DP slave	■	■
Integrated I/O
Digital inputs	4 x 24 V DC; for BERO evaluation, for example
Digital outputs	8 x 24 V DC; for high-speed cam switching functions
Integrated functions	Gearbox synchronism and curve synchronism Travel to fixed stop Registration mark correction via measuring probe Path-or time-dependent cam switching Controlled positioning