14
SV
PV
Open
OUT1 5-6
OUT1
Lit
hysteresis
EXCEEDED Indicator
RESET Indicator
POWER OFF
POWER ON
Lit
Unlit
Unlit
Unlit
Unlit
OUT1 4-5
Closed
Closed
Closed
Open Open
SV
PV
OUT1
POWER ON
POWER OFF
EXCEEDED Indicator
hysteresis
RESET Indicator
Unlit
Lit Unlit
UnlitUnlit
Lit
OUT1 5-6
OUT1 4-5
Closed
Open
Closed
Closed
Open Open
7. Action explanation
7.1 High limit control action (Fig. 7.1-1)
Auto limit control will be used for purposes of explanation of the High limit control action. (Refer to Section 7.3)
(Fig. 7.1-1)
(1) Limit control action will initiate after power supply to the controller is turned on.
(2) If PV exceeds SV, the EXCEEDED and RESET indicators light, and
OUT1 (Limit control output terminals between 5-6) is turned OFF.
(3) If PV drops below [SV-OUT1 hysteresis], the EXCEEDED indicator goes off.
At this time, the RESET indicator is lit, and OUT1 (Limit control output terminals between 5-6) is in OFF status.
(4) If the
RESET
key is pressed, or if external reset input terminals between 15-17 are shorted, the RESET
indicator goes off, OUT1 (Limit control output terminals between 5-6) is turned ON, and limit control
action initiates again.
(5) While the EXCEEDED indicator is lit, even if the
RESET
key is pressed or even if external reset input
terminals between 15-17 are shorted, limit control action does not initiate.
7.2 Low limit control action (Fig. 7.2-1)
Auto limit control will be used for purposes of explanation of the Low limit control action. (Refer to Section 7.3)
(Fig. 7.2-1)
key or External
reset input
(1)
(2) (3)
(4)
(5)
key or External
reset input
(1)
(2)
(3)
(4)
(5)
Deenergized action
Energized action
RESET
RESET
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