Omron SYSMAC C Series User Manual page 89

Instruction words
The latching relay program must be entered in the order of a set input
circuit, a reset input circuit, and a latching relay coil.
When both a set input and a reset input are applied at the same time, the
reset input takes precedence.
Set input z]
Reset input El
Latching relay
output (0500)
If the holding relay is used as a latching relay, data in the memory are
retained during power failure until a set or reset input is applied.
Coding chart
| Address | Instruction | Data |
0200 | LD
[ 0002 |
0201 0002
0202
0203
Contents of data
Output relay, in- | 0500 to 1807
ternal auxiliary
relay
Holding relay HRO00 to 915
DIFFERENTIATION UP (DIFU)
(relay no.)
Symbol Function
Causes relay to operate at leading edge of the input for one scan time
aa
, Remarks
Ladder diagram This instruction is used to output the differentiation of an input condition to
0000 0001 a specified relay for one scan time.
HH 4 :
| 0500| The instruction must be set so that the output is issued for one scan time
at the leading edge of the result register, that is, at the point when the
register's level turns from 0 to 1.
When used with the DIFFERENTIATION DOWN (DIFD) instruction, the
maximum number of DIFU and DIFD instructions that can be program-
med together is 48.