Saturday, March 10, 2012

Eason Technology 1000 Series PLC Interfaces

The PLC Interfaces of Eason Technology 1000 Series are designed to create a lot of the individual details of a variety of PLC Interfaces apparent to the user. That is to state that reading a register in a PLC Modicon utilizes the same process as reading a register in an PLC Omron. This lets a specified program to be written for a PLC and then utilized with another PLC just by varying the option of PLC Interface in the 1000 Series unit. This thinks, of course, that both PLC's have equal functionality. For instance TI and Modicon delicacy analog I/O very in a different way so they are entranced differently through the 1000 Series.

3 calls are the PLC communications heart. They are CALL PLCWRITE, CALL PLCREAD, CALL and PLCINIT. The calls can be utilized in any practical location within a program of BASIC running in the 1000 or 1100 Model with an option of PLC Interface. This lets the data use in a register, status of bit, value of analog I/O, or any other appropriate data available from a PLC in an interface or process program in the device of 1000 Series. The PLC Interface is on the 1000 Series device COM1 for most of the PLC Interface Options. COM2 maintains its status default. The -SL5, -PL5, and –MOD Options have the capability to correspond to the PLC from either port of COM.

The COM2 is still standard RS232C in a Model 1000. The COM2 can still be configured to be RS485, RS422, or RS232C in a Model 1100. This lets the PLC integration and virtually any other serial communications device. For instance, you can join a COM1 to PLC and another device that utilizes serial communication to COM2 and correspond to all machines through the interface of 1000 Series. The 1000 Series works as an ASCII/BASIC module and an Operator Interface in one.

The PLC Interface initialization always happens with the command of CALL PLCINIT. This command require only be issued one time, generally during your program initialization portion. Any data that you desire to acquire from the PLC is recovered by the command of CALL PLCREAD. Data that you desire to write in a register, locations of memory that you wish to identify, or I/O bits you desire to set are all affected with the statement of CALL PLCWRITE. Mostly the PLC Interfaces built so far utilize the similar arguments for analogous functionality, no substance which Interface is established.

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