arclivin

Can anybody suggest me a cheapest s7 siemens plc to buy (s7 300,s7400,s7 1200,please consider price including software,power supply,communication modules like cp341,cp441-2,cm1241) that supports ASCII and Modbus RTU .

Please can anybody advice me whether the Siemens PLC model attached( as attachment) can be used as an interface to establish serial port communication with DAC Quad manual attached below for serial port communication using rs232 serial port DB09 connector to remote scada system with Modbus RTU communication S7-1211C.pdf DAC-Quad-Manual.pdf

I want to send the serial port commands attached from a PLC to DMX Controller.The PLC maybe siemens.schneider/ge not confirmed by customer. How the commands respond to Hyperterminal is already given in the attachment but he want to use a PLC to do this which is attached to a remote SCADA system using MODBUS RTU. PLEASE suggest a way how this can be done Serial port commands.pdf

I want to interface a DMX controller with a PLC(probably siemens-S7 400/Schneider Quantum/GE Fanuc).The DMX Controller has a RS232 Serial port in it.The DMX Controller accepts and responds to serial port commands which are mainly ASCII commands. eg: "i00" for status "a" to start a show "b" to stop a show Please suggest how this device can be interfaced with the PLC and how this PLC can sent the commands and accept the response. The PLC is actually a part of a scada system which monitors the whole project.