When The System Is Powered On Or Reset; Execution Conditions Of Predefined Protocol Communications - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Execution conditions of predefined protocol communications

The predefined protocol communications can be executed when 'Predefined protocol ready' (Un\G1901002.0) is on.
This section describes the operation of 'Predefined protocol ready' (Un\G1901002.0).

When the system is powered on or reset

If protocol setting data is written in, the Ethernet-equipped module checks the protocol setting data when the system is
powered on or reset.
If the protocol setting data is normal, the Ethernet-equipped module turns on 'Predefined protocol ready' (Un\G1901002.0),
and enables execution of the protocol.
'Predefined protocol ready' (Un\G1901002.0) is used as the interlock signal for executing the protocol.
If the protocol setting data is abnormal, 'Predefined protocol ready' (Un\G1901002.0) stays off, and the details of the error are
stored in 'Predefined protocol setting data check area' (Un\G1901020 to Un\G1901047).
If protocol setting data is not written in, the protocol setting data is not checked, and 'Predefined protocol ready'
(Un\G1901002.0) remains off.
Whether the protocol setting data is registered or not can be checked with 'Number of registered predefined protocols'
(Un\G1901024) and 'Predefined protocol registration' (Un\G1901032 to Un\G1901047).
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1.3 Communications Using the Predefined Protocol