MITSUBISHI ELECTRIC 700 Series - Manual (Page 117)

112
Sequence Instructions
Functions
(1) LD is an N/O contact operation start instruction, and LDI is an N/C contact
operation start instruction. Each of them imports the ON/OFF data of the specified
device and uses it as an operation result.
(1) AND is an N/O contact series connection instruction, and ANI is an N/C contact
series connection instruction. Each of them imports the ON/OFF data of the
specified device, ANDs it with the previous operation result, and uses the
resultant value as an operation result.
(2) There are no restrictions on the use of AND and ANI, but there are the following
conditions in the ladder mode.
1) Write......... When contacts are connected in series by AND or ANI, a ladder of
up to 21 contacts can be created.
2) Read......... When contacts are connected in series by AND or ANI, a ladder of
up to 24 contacts can be displayed. If the ladder has more than 24
contacts, up to 24 contacts are displayed.
(1) OR is an N/O contact parallel connection instruction, and ORI is an N/C contact
parallel connection instruction. Each of them imports the ON/OFF data of the
specified device, ORs it with the previous operation result, and uses the resultant
value as an operation result.
(2) There are no restrictions on the use of OR and ORI, but there are the following
conditions in the ladder mode.
1) Write......... A ladder of up to 23 contacts connected consecutively by OR or
ORI can be created.
2) Read......... A ladder of up to 23 contacts connected consecutively by OR or
ORI can be displayed. If the ladder has more than 23 contacts, it
cannot be displayed properly.
Execution Conditions
Executed every scan independently of the device ON/OFF and preceding operation
result.
LD, LDI
AND, ANI
OR, ORI