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The Allen-Bradley CSP/PCCC protocol supports communication with the Allen-Bradley devices of the SLC-500 series using a TCP connection.
It also supports communication via the DF1 gateway with SLCs that communicate via DH+ or DH485.
Communication was tested e.g. with the following SLC:
- SLC 5/05 1747-L551/C Ethernet Processor
- SLC 5/05 1747-L552/C Ethernet Processor
- SLC 5/05 1747-L553/C Ethernet Processor
Note: PCCC message encapsulation is also supported within the Ethernet/IP Protocol (communication with MicroLogix 1100 or SLC 5/05 1747-L553/C Ethernet Processor)
| Kotva | ||||
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| Parameter | Description | Unit | Default Value | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Timeout to receive a response from PLC. | s | 1.000 | ||||||
| The number of the request retries in case of a communication failure. | - | 3 | ||||||
| If using a DF1 gateway, the node address of the destination device (node) on a DH+ or DH485 bus. If the DF1 gateway is not in use, the default value of 0 must be used. | - | 0 | ||||||
| Activates the block reading mode (for Integer, Binary, Status, Float, Timer, and Counter types). Input and Output types don't support block reading mode. | YES/NO | NO | ||||||
| Maximum block size (2-255 bytes) if a block reading mode is active. | bytes | 40 | ||||||
| Activates detailed listings about sending and receiving values. | - | False |
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The address of the I/O tag is a text in a an SLC-500 format. The address format is:
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| $ | - optional character |
| X | - file identifier (required - see Table 2) |
| file | - file number (optional, if it is empty, the default file number is used - see Table 2) |
| element | - element number in the file (required) |
| .field | - number of sub-element (optional, it is used only for Output, Input files) |
| /bit | - bit number (optional, it must be in the range of 0..15) |
Note: Te following syntax is also supported:
[$] X [file][/bit]where a bit can be greater than 16, e.g., B3/18 is another notation for B3:1/2 (the third bit of the second word in the B3 file).
Table 2
| X | File Type | Default file number (file) |
|---|---|---|
| O | Output | 0 |
| I | Input | 1 |
| S | Status | 2 |
| B | Binary | 3 |
| T | Timer | 4 |
| C | Counter | 5 |
| N | Integer | 7 |
| F | Float | 8 |
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