Mitsubishi MELSEC-A series, Programming Manual

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5. SEQUENCE INSTRUCTIONS
5
−
3
MELSEC-A
2) Read: When AND or ANI is connected serially, a circuit of up to 24 stages
can be displayed at one time. if a circuit has 25 or more stages,
stages 1to 24 are displayed at one time.
OR, ORI
(1) OR is the parallel connection instruction of one contact A and ORI is the parallel
connection instruction of one contact B. They draw the ON/OFF data of the
specified device, performs the OR operation of that data and the previous
operation result, and use it as a new operation result.
(2) There are no restrictions on the use of OR and ORI. However, the following
conditions are provided in ladder mode on the GPP.
1) Write: A circuit, in which up to 23 ORs or ORIs are connected consecutively,
may be written.
2) Read: A circuit, in which up to 23 ORs or ORIs are connected consecutively,
may be displayed. A circuit containing more than 23 ORs or ORIs
cannot be completely displayed.
Execution Executed every scan independently of the device status and operation result.
Conditions