Siemens S7-200 Communication Module

The S7-200 communication module operates the integrated RS485 interface at data rates from 1.2 to 187.5 kbaud: When the unity bus reaches 126 participants: Programming devices, SIMATIC HMI products and CPUs can be networked without problems. In a pure S7-200 network, this is achieved via the integrated PPI protocol. the S7-200 communication module, SIMATIC S7-300/400 or SIMATIC HMI in a network consisting of fully integrated automation devices, integrates the 7-200 CPUs as MPI slaves. User-specific protocols such as ASCII (which supports the interconnection of modems, printers, bar code readers, personal PCs, third-party PLCs and any other devices) are used in a freely programmable mode up to 115.2 kbaud. Using USS protocol commands, 32 Siemens inverters can be controlled without additional hardware.

 The Siemens S7-200 Communication Module Micro PLC provides communication capabilities.

The integrated RS485 interface can be operated at data rates from 1.2 to 187.5 kbaud:

- When the unity bus reaches 126 participants: Programming devices, SIMATIC HMI products and CPUs can be networked without problems. In a pure S7-200 network, this is achieved via the integrated PPI protocol. In networks consisting of fully integrated automation devices, such as SIMATIC S7-300/400 or SIMATIC HMI, the 7-200 CPUs are integrated as MPI slaves.

- In freely programmable mode up to 115.2 kbaud, user-specific protocols such as ASCII are used (this supports the interconnection of modems, printers, barcode readers, personal PCs, third-party PLCs and any other devices). Using USS protocol commands, up to 32 Siemens inverters can be controlled without additional hardware.

The connection to the Modbus RTU network can be established via Modbus protocol commands.

Modem communication

The S7- 200 CPU can be accessed almost anywhere in the world via a modem in a wired or wireless network.

- Remote service: Modern communication options help to avoid expensive service calls. Only two modems are required for remote use of complete functions such as program transfer, status or control; various communication tools are integrated as standard. The local modem can be used as an external modem.

- Remote control: You can call messages and measured values via modem, as well as define new setpoints or commands. In this case, one base station S7- 200 can control an almost unlimited number of remote stations. The protocol for data transmission can be freely selected, e.g. text messages directly to a cell phone, error messages to a fax machine or Modbus RTU.

Fast PROFIBUS connection

With the EM 277 communication module it is possible to run all CPUs from 222 upwards as standard slaves on a PROFIBUS DP network with a transmission rate of up to 12 Mbit/s. The openness of the S7- 200 to higher levels of PROFIBUS DP control level is a feature that ensures that you can integrate a single machine into your production line. With the EM 277 expansion module, you can realize the PROFIBUS capability of individual machines equipped with the S7-200.

Highly functional AS-Interface connection

On the AS-Interface network the CP243-2 will be upgraded from the CPU from 222 to the functionally large master. According to the new AS-V2.1 interface specification, up to 62 stations can be connected, even with easily integrated analog sensors. With the AS-Interface it is possible to connect up to 248 more DIs + 186 DOs in the configuration. large The number of 62 stations can include up to 31 analog modules. The convenient AS-Interface interface wizard supports the configuration of slave stations and read/write data.

 Design and functionality

The built-in RS485 interface works at data rates up to 187.5 kbit / s and functions as follows:

- as a large has a system bus with 126 stations. In this capacity, networked programming devices, SIMATIC HMI products and SIMATIC CPUs can be connected without any problems. The integrated PPI protocol for pure S7-200 supports multiple masters from a single port.