Spectrum Controls 1769sc-IF4IH User Manual page 83

Message
Returned
First
Page
Second
Page
Up to 257
Bytes
nth Page
Message
Returned
First
Page
Second
Page
Up to 257
Bytes
nth Page
Message
Returned
First
Page
Second
Page
Up to 257
Bytes
nth Page
User' s Manual 0300215-03 Rev. A
Chapter 7: Enabling and Using HART on the 1769sc-IF4IH0
Figure 7-7 Receiving Message
MsgMasterControl = 00|02
MsgSlaveControl = 02|01
Bytes received <> MsgResponseSize
MsgMasterControl = 01|02
MsgSlaveControl = 02|02
Bytes received <> MsgResponseSize
MsgMasterControl = 02|02
MsgSlaveControl = 02|02
Bytes received = MsgResponseSize
If checksum
is valid, then
message
complete
38 Bytes
38 Bytes
38 Bytes
7-15
MsgSlaveControl (Hex) =
RR|SS
RR = Page Last Received
SS = Page Being Sent
MsgResponseSize =
Total size of response
message, up to 257 bytes.
MsgResponseBuffer =
One page of data being
sent to the PLC. Last byte
is page checksum. 1 page
= 38 bytes max.
MsgSlaveControl (Hex) =
RR|SS
RR = Page Last Received
SS = Page Being Sent
MsgResponseSize =
Total size of response
message, up to 257 bytes.
MsgResponseBuffer =
One page of data being
sent to PLC. Last byte is
page checksum. 1 page =
38 bytes max.
MsgSlaveControl (Hex) =
RR|SS
RR = Page Last Received
SS = Page Being Sent
MsgResponseSize =
Total size of response
message, up to 257 bytes.
MsgResponseBuffer =
One page of data being
sent to PLC. Last byte is
page checksum. 1 page =
38 bytes max.