Omron Host Link implements communication CPU Units that are compatibles with C-mode commands via Host Link. The communications blocks are dynamically created according to the pooling cycle defined on the Access Type for each Device Point.
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Communication Driver Name: OmronHostLink
Implementation DLL: T.ProtocolDriver.OmronHostLink.dll
Protocol: Host Link Interface protocol
Interface: Serial
Equipments supported: CS/CJ/CP-series CPU Unit or NSJ Controller
Communication block size: 29 Word Addresses
Protocol Options: Block Size, Ignore Non-critical error, and Change the PC mode for Writings
PC Hardware requirements: Standard PC with RS232 port
Supported Operands:
| Operand | Read | Write | Data Type | Address Size |
|---|
| IR – Internal Relay | Yes | Yes | Word | 2 bytes |
| SR – Extended Relay | Yes | Yes | Word | 1 bit |
| HR – Holding Bit | Yes | Yes | Word | 2 bytes |
| AR - Auxiliary Bit | Yes | Yes | Word | 2 bytes |
| DM – Data Memory | Yes | Yes | Word | 2 bytes |
| PV – Timers/Counter Value | Yes | Yes | BCD | 2 bytes |
| TC – Timer/Counter Status | Yes | Yes | BCD | 2 bytes |
Channel Configuration
Protocol Options
Max Block Size: Determines the maximum block size. Default: 29 Word Addresses
Ignore Non-Critical Error: Indicates the driver's behavior when the PLC returns a non fatal error status of 64:
- True: When it returns a Success with the 64 error code, set the tag quality to GOOD
- False: When it returns a Failed with the 64 error code, set the tag quality to BAD
Change the PC mode for Writings: Indicates if the communication driver should send a command that changes the PLC state to MONITOR in order to perform writing operations. If not, the writing will fail (error code 1). Default = True
Settings
Serial channels:
Default RS-232 serial port configuration
Node Configuration
Station Configuration
Serial (RS232) Channels:
The syntax is: <Device id>
Where:
- <Device id> is the PLC address
Multi Serial channels:
Syntax: <Port>;<Device id>
Where:
- <Port> is the COM port for communication (default is COM1)
Ex: COM1;0
Point Configuration
The syntax for the communication points is: <Memory Area>:<Address>
The Valid memory areas are:
- IR Internal Relay Bit Area
- HR Holding Relay Bit Area
- AR Auxiliary Relay Bit Area
- LR Link Relay Area
- DM Data Memory Area
- PV Timer/Counter Present Value Area
- TC Timer/Counter Status Area
Ex:
- CA:0 Memory Area = CA, Address = 0
- CIO:20 Memory Area = CIO, Address = 20
- EM0:1 Memory Area = Extended Memory 0, Address = 1
- EM6:1 Memory Area = Extended Memory 6, Address = 1
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.
| PLC Error Code | Description |
|---|
| 1 | Not executable in RUN mode |
| 2 | Not executable in MONITOR mode |
| 4 | Address over (CPM1 PLCs) |
| 5 | Invalid Header |
| 6 | Invalid Address |
| 7 | Invalid block size |
| 11 | Not executable in PROGRAM mode |
| 19 | FCS error |
| 20 | Format error |
| 21 | Entry number data error |
| 22 | Command not supported |
| 24 | Frame length error |
| 25 | Not executable |
| 35 | User memory write-protected |
| 163 | Aborted due to FCS error in transmit data |
