Omron SYSMAC C Series User Manual page 88

Instruction words
Ladder diagram
LATCHING RELAY (KEEP)
Symbol
R
Ladder diagram
0001 0002
{qH
0003 0004 |
tt f:
$ Contents of data (start channel and
Coding shart end channel nos.)
Output relay, internal | o5 ro 17
auxiliary relay
Holding relay HRO to 9
When more than 16-bit shift register is needed
If a shift register should need to exceed 16 bits, a shift register circuit can
be configured by combining two or more stages of 16-bit shift registers.
Coding chart
[Address] Instruction | Data |
0200 is 0000
0201 _| LD oor
0203 | SFT (10)
COo Td o Od mn]
The circuit configuration shown above is of a 32-bit shift register from
1000 to 1115.
The data for the SFT instruction must be input with the upper-stage SFT
data which are less than or equal to the lower-stage SFT data and are
within the same relay area.
Function
Acts as latching relay
Remarks
This instruction can be used to create a latching relay which is used in the
same manner as a relay circuit.
The latching relay operates when the content of the result register is
logical 0 and the content of the stack register is logical 1. The relay
releases when the content of the result register is logical 1.