Rockwell-automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Instrukcja Użytkownika Pobierz pdf (Strona 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

1 2 ... 107 108 109 110 111 112 113 114 115 116 117 ... 163 164

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