Allen-Bradley CSP/PCCC communication protocol (Client Server Protocol / Programmable Controller Communication Command)
Supported device types and versions
Communication line configuration
Station configuration
I/O tag configuration
Document revisions
Supported device types and versions
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)
Communication line configuration
Communication line category: TCP/IP-TCP.
The default TCP port for the Allen-Bradley CSP/PCCC protocol is 2222.
Station configuration
Communication protocol: "Allen-Bradley CSP/PCCC".
The station address is not configured.
Station protocol parameters
Dialog window station configuration - tab "Protocol parameters".
They influence some optional protocol parameters. The following station protocol parameters can be entered:
Parameter | Description | Unit | Default Value |
|---|---|---|---|
Response Wait Timeout | Timeout to receive a response from PLC. | s | 1.000 |
Retry Count | The number of the request retries in case of a communication failure. | - | 3 |
Destination Node Address | 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 |
Block Read | 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 |
Max. Block Length | Maximum block size (2-255 bytes) if a block reading mode is active. | bytes | 40 |
Full Debug | Activates detailed listings about sending and receiving values. | - | False |
I/O tag configuration
Possible I/O tags: Ai, Ao, Ci, Co, Di, Dout.
The address of the I/O tag is text in an SLC-500 format. The address format is:
[$] X [file] : element [.field] [/bit]
Explanatory notes:
$ | - 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 |