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Read/Write data from Allen Bradley Compact/Control Logix PLC's
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USAGE: 1) import the EIP file: import eip as PLC 2) init: PLC.__init__() 3) Set the IP Address property: PLC.IPAddress("192.168.1.10") 4) If your processor is in a slot other than 0, set that: PLC.ProcessorSlot(n) 5) Do one of the following: Read a value: value = PLC.Read("tagname") ex: value = PLC.Read("MyTimer.ACC") print value Read an array: value = PLC.Read("tagname", length) ex: value = PLC.Read("MyDINT", 10) print value(3) Multi-read values = PLC.MultiRead("Tag1", "Tag2", "Tag3") print values Write a value: PLC.Write("tagname", value) ex: PLC.Write("MyTimer.PRE", 100") Get a list of the controller tags: taglist = PLC.GetTagList() taglist will be an object with the following properties: .TagName .Offset .DataType if you want to know how many tags: print len(taglist) access one: print taglist[4].TagName Get the PLC Clock time: time=PLC.GetPLCTime() ex: time=PLC.GetPLCTime() print time So a complete script to read a tag would look like this: import eip as PLC PLC.__init__() PLC.IPAddress("192.168.1.10") value = PLC.Read("MyTimer.ACC") print value ************************************************************************* Added identify.py. If you call the ListIdentity() function, it will send out a UDP packet which will request that all listening devices respond with some information about each device. It will be returned to you in a list. Usage would look like this: from identify import * devices=ListIdentity() for i in xrange(len(devices)): print devices[i].Address, devices[i].ProductName The complete data structure returned is: .Address .VendorID .Vendor .DeviceID .DeviceType .ProductCode .Revision .Status .SerialNumber .ProductName .State
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