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Korangi Industrial Area,
Karachi-74900,
Pakistan
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We are Pakplc
With over 32 years of experience
C&M Engineering, geographically located in Asia, business city Karachi the heart of Pakistan. Republic in southern Asia, at 23.30º to 36.45º north latitude, and 61º to 75.31º east longitude, bounded on the north and north-west by Afghanistan, on the north-east by China, on the east and south-east by India, on the south by the Arabian Sea and on the west by Iran. The area of Pakistan is 796,095 sq. km (307,374 sq. mi). The time zone of Pakistan is GMT+5. The capital of Pakistan is Islamabad, the largest city of the country is Karachi.
C&M established in 1986, helping manufacturers succeed and grow is what we do best — with industrial automation control and information solutions designed to give our customers a competitive advantage. From stand-alone, industrial components to enterprise-wide integrated systems, our solutions have proven themselves across a wide range of industries and in some of the most demanding manufacturing environments.
End users and machine builders (OEMs) alike rely on our comprehensive portfolio of equipment, software and serivices to deliver value and help them meet their objectives.
Recognized Expertise
We are recognized System Integrators for Siemens Factory Automation Products
Product development
In house development of Embedded Solutions
Pakistan Engineering Council
Siemens Approved System Integrator
Simatic S7-300
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 |
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