Specifications
76 209351 REV B Operations Manual, Redundant System Controllers
The Response frame from the receiver will contain a Get Response designator in the
Command field. If the receiver does not detect any errors in the Get Request frame,
the requested data will be attached to the response frame. The length of the Get
Response frame varies by the amount of attached data bytes. It may contain 11+N
bytes where N is the amount of requested data bytes from a particular table, specified
in the Data Length field.
The Set Request command allows the sender to actively change parameters for the
receiver’s internal configuration. The Set Request frame must contain a number of
bytes in the Data Field as specified in the Data length field. The frame size must be
11+N bytes, where N is the length of the attached data structure. The receiver will
respond with a frame where the command field will be set to a Set Response
designator. The frame length is equal to the Request frame.
The byte value for each command is given in Table 7-1.
7.2.2.4 Data Tag
The RCP2 internal structure is organized in several tables, all of which share similar
functionality and internal resources. To access the various tables, the data tag must be
specified in the request frame. The data associated with certain tags is read only.
Therefore only the “Get” command request would be allowed to access these data
tags. The RCP2 will return an error on attempts to issue a “Set” request to a read-only
table tag. Various tables may contain values formatted either in 1 or 2 bytes format.
The Packet Wrapper Tag provides direct access to the RCP2 Local Port and has no
table association. The data tag byte values are given in Table 7-2.
Command Name
Command Byte Value
Set Request 0
Get Request 1
Set Response 2
Get Response 3
Table 7-1: Command Byte Values