Mitsubishi Electric MELSEC iQ-R User Manual page 129

START
(Initial value of the CONTROL is 0)
<Module>
Read the CONTROL
<User>
CONTOROL=1(send request)
YES
<Module>
Read the instance number of a
destination device, an ObjectIdenti-
fier, and a PropertyIdentifier
<Module>
The information is invalid
NO
<Module>
Send a ReadPropertyMultiple
<Module>
Write '2' (sending) to the CONTROL
<Module>
Write '3' (normal completion) to
the CONTROL
END
Precautions
• Before storing values to an access block for reading, check that the CONTROL is other than '1' (send request) or '2'
(sending).
• After '1' (send request) is stored to a CONTROL, do not change the values of an access block for reading until the
CONTROL becomes '3' (normal completion) or '4' (error end).
NO
YES
<Module>
Write '7' (invalid information) to the
STATUS
<Module>
Write '4' (error end) to
the CONTROL
1 FUNCTIONS
1.4 BACnet Request Function (Read Function)
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