Rockwell Automation 1770-HT8 SMART TRANSMITTER - Manual (Page 87)

Communicating with the Smart
Transmitter Interface
Chapter 4
Communicating with the Smart Transmitter
Interface
4-22
Set Number of Retries (hexadecimal command 21)
Use this command to set the number of retries (from 0 to 15) the Smart
Transmitter Interface attempts for a specified channel when a field device
fails to respond to the initial HART Poll command. The default number of
retries is 3. The number of retries is specified in the Smart Transmitter
Interface Parameter field of the header. Placing hexadecimal FF in the
Smart Transmitter Interface Channel field results in the specified number
of retries being assigned to every channel.
Read Status and Statistics (hexadecimal command 30)
Use this command to request that the Smart Transmitter Interface return
data containing status and statistics for the specified channel. Table 4.H
illustrates the format of this information in the Smart Transmitter Interface
Data field. If the specified channel is hexadecimal FF, then data for the
Smart Transmitter Interface is returned in the Smart Transmitter Interface
Data field formatted as in Table 4.I. Either response is returned to the
programmable controller via the next BTR, or to a host computer via a
DF1 Response.
Reset Statistics Counters (hexadecimal command 31)
Use this command to direct the Smart Transmitter Interface to reset all the
statistics counters to 0, so that the counters can be initialized to known
values.
Read ID (hexadecimal command 32)
Use this command to direct the Smart Transmitter Interface to return a data
packet containing an ID code. The programmable controller can access this
data on the next BTR issued, while a host computer will receive this
response as specified by the DF1 protocol. Table 4.J shows the response
format.