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The ControlLogix protocol can be used in two independent ways: with a TagProvider configuration or as a Device > Channel > Node > Point configuration.
A TagProvider allows you to connect with data directly, without creating local tags, using the tag names from the remote device.
A DeviceChannel allows you to map tags to external data addresses, which provides more flexibility for name conventions and for managing data blocks.
Summary Information
Communication Driver Name: ControlLogix
Implementation DLL: T.ProtocolDriver.ControlLogix.dll
Protocol: ControlLogix (CIP over TCP/IP)
Interface: TCPIP
PLC types supported: ControlLogix 5000 family, FlexLogic, and CompactLogix
Manufacturer: Allen-Bradley / Rockwell
PC Hardware requirements: Ethernet board
Channel Configuration
Protocol Options
Model: The PLC model can be:
- Others: For all models except 1756-L8X
- 1756-L8X: For Allen-Bradley model: 1756-L8X, 5069-L330ERS, CompactLogix 5380 and 5069-L310ERS2 5380 GuardLogix.
MaxStringItemsPerBlock: Defines the maximum string item count for each block. For example: If there are 12 string items configured and the MaxStringItemsPerBlock is 3, the result will be 4 blocks to read string data.
Node Configuration
Station Configuration
Stations syntax: <IP>;<Port>;<Slot>
Where:
- <IP> = The IP address of the slave device in the network
- <Port> = The TCP port where the slave device is listening (default is 44818)
- <Slot> = The Slot number where the CPU is connected
Example Node Configuration
Name | Node | PrimaryStation | SecondaryStation | Description |
|---|---|---|---|---|
| Node1 | ControlLogix | 192.168.1.101;44818;0 |
Points Configuration
Address Column Configuration
The syntax for the ControlLogix communication points is: <Type>:<DeviceTagName>
Where:
- <Type> is the data type of a tag in a PLC. The valid type values are:
Type | Read | Write | Size | Range of Value |
|---|---|---|---|---|
| BOOL | yes | yes | 1 bit | 0 or 1 |
| SINT | yes | yes | 1 byte or 8 bits | -128 to 127 |
| INT | yes | yes | 2 bytes or 16 bits | -32768 to 32767 |
| DINT | yes | yes | 4 bytes or 32 bits | -2,147,483,648 to 2,147,483,647 |
| REAL | yes | yes | 4 bytes or 32 bits IEEE Floating point | -9.99x1037 to 9.99x1037 |
| STRING | yes | yes | n bytes | --- |
- <DeviceTagName> is a Tag Name in a PLC. Possible formats for DeviceTagName:
Format | Syntax | Comments |
|---|---|---|
| Standard | <Device Tag Name> | |
| Array Element | <Device Array Tag name>[dim 1, dim2, dim3] | Dimension Range = 1 to 3 |
| User Defined Type (UDT) | <Device Main Tag Name>.<Type Member> | |
| User Defined Type (UDT) Array Element | <Device Main Tag Name>.< Type Member>[dim 1, dim2, dim 3] | Dimension Range = 1 to 3 |
Accessing Bit from SINT, INT, and DINT ControlLogix Datatypes
Method 1: The Modifiers Column
Use the Modifiers column in Device > Points to specify which Bit will be accessed
Example of a Device Point Configuration that will Access Bit 3 from INT
TagName | Node | Address | DataType | AccessType | Modifiers |
|---|---|---|---|---|---|
| Integer | Node1 | INT:PLC_INTEGER | Native | ReadWrite | Bit = 3 |
Method 2: The Tag Property
In the Device the whole word into a tag and use the Tag property to access the specify Bit.
Example of a Device Point Configuration that will Access a Whole Word
TagName | Node | Address | DataType | AccessType |
|---|---|---|---|---|
| Integer | Node1 | INT:PLC_INTEGER | Native | ReadWrite |
Syntax that will Access a Tag Property in Any Area of a Project
Tag.<TagName>.Bit<Bit Number>
E.g.: Tag.Interger.Bit3
Example Points Configuration
TagName | Node | Address | DataType | AccessType |
|---|---|---|---|---|
| Digital | Node1 | BOOL:PLC_BOOLEAN | Native | ReadWrite |
| Digital[2] | Node1 | BOOL:BOOLEAN_ARRAY[2] | Native | ReadWrite |
| DigitalUDT | Node1 | BOOL:MAINTAG.PLC_BOOLEAN | Native | ReadWrite |
| DigitalUDT[4] | Node1 | BOOL:MAINTAG.BOOLEAN_ARRAY[4] | Native | ReadWrite |
| Word | Node1 | SINT:PLC_SINTEGER | Native | ReadWrite |
| Word[7] | Node1 | SINT:SINTEGER_ARRAY[7] | Native | ReadWrite |
| WordUDT | Node1 | SINT:MAINTAG.PLC_SINTEGER | Native | ReadWrite |
| WordUDT[8] | Node1 | SINT:MAINTAG.SINTEGER_ARRAY[8] | Native | ReadWrite |
| Integer | Node1 | INT:PLC_INTEGER | Native | ReadWrite |
| Interger[3] | Node1 | INT:INTEGER_ARRAY[3] | Native | ReadWrite |
| IntegerUDT | Node1 | INT:MAINTAG.PLC_INTEGER | Native | ReadWrite |
| IntegerUDT[10] | Node1 | INT:MAINTAG.INTEGER_ARRAY[10] | Native | ReadWrite |
| Double | Node1 | DINT:PLC_DINTEGER | Native | ReadWrite |
| Double[14] | Node1 | DINT:DINTEGER_ARRAY[14] | Native | ReadWrite |
| DoubleUDT | Node1 | DINT:MAINTAG.PLC_DINTEGER | Native | ReadWrite |
| DoubleUDT[12] | Node1 | DINT:MAINTAG.DINTEGER_ARRAY[12] | Native | ReadWrite |
| Real | Node1 | REAL:PLC_REAL | Native | ReadWrite |
| RealArray[5] | Node1 | REAL:REAL_ARRAY[5] | Native | ReadWrite |
| RealUDT | Node1 | REAL:MAINTAG.PLC_REAL | Native | ReadWrite |
| RealUDT[34] | Node1 | REAL:MAINTAG.REAL_ARRAY[34] | Native | ReadWrite |
| Text | Node1 | STRING:PLC_STRING | Native | ReadWrite |
| TextArray[26] | Node1 | STRING:STRING_ARRAY[26] | Native | ReadWrite |
| TextUDT | Node1 | STRING:MAINTAG.PLC_STRING | Native | ReadWrite |
| TextUDT[21] | Node1 | STRING:MAINTAG.STRING_ARRAY[21] | Native | ReadWrite |
Troubleshoot
The status of the driver's execution can be observed through the diagnostic tools, which are:
• Trace window
• Property Watch
• Module Information
The above tools indicate if the operations have succeeded or have failed. A status of 0 (zero) means communication is successful. Negative values indicate internal driver errors, and positive values indicate protocol error codes.
Error Codes
| Error Code | Description | Possible Solution |
|---|---|---|
| 0 | Success |
|
| -100 | Error Sending Message |
|
| -101 | Error Sending and Waiting Message | |
| - 102 . . . -105 | Error Creating the TCP/IP connection | |
| -106 | Error Receiving Message | |
| -112 | Timeout Start Message |
|
| -113 | Timeout between Treated Characters | |
| -114 | Timeout End Message | |
| -115 | Timeout Connect | |
| -200 | Protocol Error |
|
| -201 | Invalid Protocol |
|
| -202 | Invalid Station |
|
| -204 | Invalid Message Sequence |
|
| > 0 | CIP Error |
|
CIP Error Codes
| Error Code | Description |
|---|---|
| 1 | Connection Failure |
| 2 | Connection Failure |
| 3 | Value invalid |
| 4 | IOI could not be deciphered or tag does not exist |
| 5 | Unknown destination |
| 6 | Data requested would not fit in response packet |
| 7 | Loss of connection |
| 8 | Unsupported service |
| 9 | Error in data segment or invalid attribute value |
| 10 | Attribute list error |
| 11 | State already exists |
| 12 | Object model conflict |
| 13 | Object already exists |
| 14 | Attribute not settable |
| 15 | Permission denied |
| 16 | Device state conflict |
| 17 | Reply will not fit |
| 18 | Fragment primitive |
| 19 | Insufficient command data / parameters specified to execute service |
| 20 | Attribute not supported |
| 21 | Too much data specified |
| 26 | Bridge request too large |
| 27 | Bridge response too large |
| 28 | Attribute list shortage |
| 29 | Invalid attribute list |
| 30 | Embedded service error |
| 31 | Failure during connection |
| 34 | Invalid reply received |
| 37 | Key segment error |
| 38 | Number of IOI words specified does not match IOI word count |
| 39 | Unexpected attribute in list |
For this driver, it is very important to enable the TraceWindow messages, as invalid addresses can cause the communication block with the PLC to fail. The TraceWindow tool (when Device is enabled in the settings) will display the first invalid address found on the block.
To have a quick view of the many communication blocks, open the ModuleInformation, use the tree to find ControlLogix, and select the Read Groups. The success and fail communication counters allow you to easily identify any blocks with errors. Then, you can use the TraceWindow to locate the incorrect address.
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