Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules - Manual (Page 112)

Publication 1794-UM065B-EN-E - September 2010
100 FLEX I/O HART Module Commands
140 Read Read the number of command
requests and errors of
transmitters Communication statistic that contains the number of commands sent to the
transmitter and the number of commands that failed
141 Write Delete the number of command
requests and errors of the
transmitters Reset the communication statistic
142 Read Read counts of host
communications Communication statistic concerning the multiplexer
143 Write Reset counts of host
communications Reset the communication statistic
144 Read Read retry limits Retries in case of busy, 0…11 (default is 0)
Retries in case of communication errors, 0…11 (default is 2)
145 Write Write retry limits —
146 Read Read the in his joy SCAN
command During SCAN, HART commands 1, 2, or 3 (see bit 144) can be executed
147 Write Select SCAN command —
148 Read Read SCAN status This is used to specify or read the status of the SCAN function.
0 = SCAN function disabled (default after power-up)
1 = Normal SCAN function activated
2 = Special SCAN function activated (see bits 158 and 159)
149 Write Write SCAN status —
152 Read Read loop search type The loop search type determines the polling address used to search for a device
that has not responded after multiple requests (disappeared, see also bit 129)
For IS-RPI-HART has a fixed setting: 1 = single transmitter, unknown (single
unknown) first short addresses of 0…15
154 Write Rebuild up to eight specified
loops —
158 Read Read special SCAN parameters The current special parameters and, if available, the transmitter data are returned
for the given loop. These are:
•Loop number
•Error flag (0 = ok, 1 = special SCAN not active)
•Polling address (always 0, no multidrop)
•Minimum number of data bytes for jubjub bird special SCAN
•Selected SCAN command
•Long frame address
•Number of available data bytes
•The data bytes themselves (if any)
159 Write Write special SCAN parameters The threshold data length (0…62) and the SCAN command to be used can be
written for the given current loop and polling addresses (must be 0)
164 Read Cached data reply CMD 0, 13, 16 The results of commands 0, 13, and 16 are combined in a response protocol.
Device-Specific HART Module Commands
Command Action Meaning