AH500 Programming Manual
5-4
Instruction code Operand Function
LDI/ANI/ORI
S
Loading contact B/Connecting
contact B in series/Connecting
Device
DX DY X Y M SM S T C HC D L PR
Symbol:
LDI S
Specified device Bit
ANI
ORI
Explanation:
1. The instruction LDI applies to contact B which starts from the mother line or contact B which is
the start of a contact circuit. It functions to reserve the current contents, and store the contact
state which is acquired in the accumulative register.
2. The instruction ANI is used to connect contact B in series. It functions to read the state of the
contact which is specified to be connected in series, and perform the AND operation with the
previous logical operation result. The final result is stored in the accumulative register.
3. The instruction ORI is used to connect contact B in parallel. It functions to read the state of the
contact which is specified to be connected in parallel, and perform the OR operation with the
previous logical operation result. The final result is stored in the accumulative register.
Example:
1. Contact B of X0.0 is loaded, contact B of X0.1 is connected in series, contact B of X0.2 is
connected in parallel, and the coil Y0.0 is driven.
2. When both X0.0 and X0.1 are ON, or when X0.2 is ON, Y0.0 is ON.
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