Mitsubishi Electric MELSEC-L Series - Execution Condition of Predefined Protocol Communication

108
11.4 Execution Condition of Predefined Protocol
Communication
Communications using the predefined protocol can be executed when Predefined protocol ready (X1D) is on.
This section describes the operations of Predefined protocol ready (X1D).
(1) When the power supply is on or reset
The E71 checks the written protocol setting data when the power supply is on or reset.
If the protocol setting data is set correctly, the E71 turns on Predefined protocol ready (X1D) then the protocols
can be executed.
Predefined protocol ready (X1D) is used as an interlock signal when the protocols are executed.
If an error has occurred in the protocol setting data, Predefined protocol ready (X1D) stays off and the error
details are stored to the protocol setting data check area (address: 5320
H
to 533F
H
).
If no protocol setting data has been set, the E71 does not check the data and Predefined protocol ready (X1D)
stays off.
The information about whether protocol setting data has been registered can be checked in Number of registered
protocols (address: 5328
H
) and Protocol registration (address: 5330
H
to 533F
H
).
(a) If the protocol setting data is set correctly
E71
Predefined protocol ready
(X1D)
Protocol setting data
check area
(address: 5320
H to 533FH)
Checking the
protocol setting data
X1D turns on when the
check result is normal.
Power on/reset
The number of registered protocols and information
about whether protocols have been registered are stored.
Check result normal