MagTek MCP - Manual (Page 26)

MCP Serial Transport Protocol
20
Echo Command
Command Code: 7 (0111)
S-frame Type: Request/Response
Request PCB: 97 (Hex)
Response PCB: A7 (hex)
Description:
When a node receives this command it should echo back the data portion of the request message
in the data portion of the response message. This command is used for testing purposes. For
example, it can be used to check if a node is present and operational.
Request Data:
A maximum of 16 bytes of data.
Response Data:
Result Code Request Data
Result Codes:
Success = 00 (Hex)
The command should always succeed.
Frame Resend Command
Command Code: 8 (1000)
S-frame Type: Indication
PCB: 88 (Hex)