Mitsubishi Electric Melsec iQ-R Series User Manual page 25

Execution of HART command
A HART command can be executed from the A/D converter module to the HART-enabled device at an arbitrary timing.
Buffer memory area for HART
0
command request
'HART command request flag'
(Un\G2200)
OFF
HART command answer flag
(execution accepted flag)
OFF
(Un\G2344.b8)
HART command answer flag
(execution completed flag)
OFF
(Un\G2344.b0)
Buffer memory area for HART
command answer
Performed by the A/D converter module
Performed by a program
(1) Set a HART command to be executed and a target channel in the following buffer memory areas for HART command request.
• 'HART command request channel' (Un\G2201)
• 'HART command request code' (Un\G2202)
• 'HART command request data size' (Un\G2203)
• 'HART command request data' (Un\G2204 to Un\G2331)
(2) When 'HART command request flag' (Un\G2200) is set to Command execution request (1), a HART command is executed. When the execution of the
HART command is accepted by the A/D converter module, HART command answer flag (execution acceptance flag) (Un\G2344.b8) is turned on.
(3) When the execution of the HART command is completed, answer details sent from the HART-enabled device are stored in the following buffer memory
areas for HART command answer. HART command answer flag (execution completed flag) (Un\G2344.b0) is turned on.
• 'HART command answer channel' (Un\G2345)
• 'HART command answer code' (Un\G2346)
• 'HART command answer data size' (Un\G2347)
• 'HART command answer data' (Un\G2348 to Un\G2475)
(4) When 'HART command request flag' (Un\G2200) is set to No request (0), the stored values of the following buffer memory areas are refreshed.
• 'HART command answer flag' (execution completed flag) (Un\G2344.b0)
• 'HART command answer flag' (execution acceptance flag) (Un\G2344.b8)
• 'HART command answer channel' (Un\G2345)
• 'HART command answer code' (Un\G2346)
• 'HART command answer data size' (Un\G2347)
• 'HART command answer data' (Un\G2348 to Un\G2475)
(1)
HART command request
ON
(2)
ON
ON
(3)
0
(4)
HART command answer
1.3 HART Communication Function
0
1 FUNCTIONS
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