Specifications

Advanced Configuration Features
EIO0000000051 6/2010 249
RTP Response Block Words Definitions
The following list shows RTP response block words:
The toggle+CMD echo bytes are located at the end of the register range to let you
validate the consistency of the data wrapped within these bytes (in case RTP
response block words are not updated in a single scan). The NIM updates the status
byte and the 4 data bytes (if applicable) before updating the toggle+CMD echo
bytes in Modbus register 45303 and 45306 to equal the value of the toggle+CMD
byte of the corresponding RTP request. You must first check that both toggle+CMD
bytes match the toggle+CMD byte in the RTP request block before making use of
the data inside the RTP response block.
Valid RTP Commands
The following list shows valid commands (CMDs):
Modbus
Address
Upper Byte Lower Byte Data Type Attribute
45303 status (the most significant bit
is used to indicate whether
RTP service is enabled:
MSB=1 means enabled)
toggle + CMD echo unsigned 16 RO
45304 data byte 2 data byte 1 (LSB) unsigned 16 RO
45305 data byte 4 (MSB) data byte 3 unsigned 16 RO
45306 - toggle + CMD echo unsigned 16 RO
NOTE: The RTP response block is also presented in the manufacturer specific area of the
CANopen fieldbus as an object with a dedicated index of 0x4100 and sub-index 1 to 4
(data type = unsigned 16, attribute = RO).
Command (CMD) Code
(Except
the msb)
Valid
Node IDs
Allowed State of
the Addressed
Node
Data Bytes
Enable RTP (Only After
RTP Has Been
Configured Using the
Advantys Configuration
Software)
0x08 127 N/A -
Disable RTP 0x09 127 N/A -
Reset Hot-Swap Bit 0x0A 1-32 N/A -
Read Parameter 0x01 1-32, 127 pre-operational
operational
data bytes in response,
length to be given
Write Parameter 0x02 1-32 operational data bytes in request,
length to be given