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Advanced Function Setting Level Section 7-6
Settings
See Also
Refer to 4-1 Shifting Input Values (page 42).
7-6-18 Alarm 1 Latch (a1lt)
Alarm 2 Latch (a2lt)
Alarm 3 Latch (a3lt)
Condition: The alarm type must be set to other than “no alarm.”
Function • When these parameters are set to ON, the latch function is added to the
alarm functions. This means that once the alarm function has turned ON,
the alarm output function is held ON until the power is turned OFF. The
latch is canceled if setting area 1 is switched to.
• When alarm output function is set to “open in alarm,” the closed output is
held, and when set to “close in alarm,” the open output is held.
• Setting changes to “alarm 1 to 3 latch” must be enabled by executing a
software reset or by turning ON the power again.
Communications
Settings
See Also
• Related Parameters
“Alarm value 1 to 3” (operation level) (page 131)
“Upper limit alarm value 1” “Lower limit alarm value 1” (operation level)
(page 132) “Upper limit alarm value 2” “Lower limit alarm value 2” (opera-
tion level) (page 133)
“Alarm 1 to 3 type” (initial setting level) (page 147)
“Standby sequence reset method” (initial setting level) (page 156)
“Alarm 1 to 3 open in alarm” (advanced function setting level) (page 157)
“Alarm 1 to 3 hysteresis” (advanced function setting level) (page 158)
Setting range Default
00000000H(0): Temperature input one-point shift
00000001H(1): Temperature input two-point shift
0: Temperature input
one-point shift
Setting ch Variable type Address
Alarm 1 latch 1 C3 002B
2 C3 012B
Alarm 2 latch 1 C3 002C
2 C3 012C
Alarm 3 latch 1 C3 002D
2 C3 012D
Setting Setting range Unit Default
Alarm 1 latch
Alarm 2 latch
Alarm 3 latch
00000000H to 00000001H
0: OFF (off)
1: ON (on)
-0: OFF
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