humbe17 Posted September 10, 2005 Report Posted September 10, 2005 HELLO, I NEED READ A BIG AMOUNT OF PARAMETERS IN A HMI SCADA (P-CIM32). THE PARAMETERS ARE GENERATED IN A MAXTHERMO MC-5438 PID CONTROLLER, THIS HAVE RS485 COMMUNICATION PORT. WHAT CAN DO FOR READ THIS DATA IN THE HMI ?, NEED A SPECIAL INTERFACE FOR DO IT ?. THANKS Quote
Crossbow Posted September 10, 2005 Report Posted September 10, 2005 You need to find out what the RS485 port on the temperature controller is designed to communicate. It will have a protocol it wants to talk, and you should be able to find an OPC server to talk it which can interface with PCIM. My guess would be it's designed to talk Modbus on the RS485 port. PCIM might have Modbus drivers built in, but most SCADA software relies on an OPC server to handle the comms these days. Quote
humbe17 Posted September 12, 2005 Author Report Posted September 12, 2005 The PCIM have in Communications options the modbus driver, bud it is associated to Modicon Controller. If i don´t have not a PLC, how can develop the communication interface ??? Quote
Crossbow Posted September 12, 2005 Report Posted September 12, 2005 If your temp controller is designed to talk Modbus, it will have Modbus addresses for the parameters and you would access it just like a PLC. PCIM isn't going to care what device it talks to, as long as it talks the right language. Did you find out what protocol the temperature controller can talk? RS485 is simply a wiring standard, you need to know the protocol (language) it wants to speak. Quote
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