15
(1) Limit control action will initiate after power supply to the controller is turned on.
(2) If PV drops below SV, the EXCEEDED and RESET indicators light, and OUT (Limit control output
terminals between 6-7) is turned OFF.
(3) If PV exceeds [SV+OUT hysteresis], the EXCEEDED indicator goes off.
At this time, the RESET indicator is lit, and OUT (Limit control output terminals between 6-7) is in OFF status.
(4) If the
key is pressed, or if External reset input terminals between 13-14 are shorted, the RESET
indicator goes off, OUT (Limit control output terminals between 6-7) is turned ON, and limit control
action initiates again.
(5) While the EXCEEDED indicator is lit, even if the
key is pressed, or even if External reset input
terminals between 13-14 are shorted, limit control action does not initiate.
7.3 Auto/Manual start
Auto start
When the power supply is turned on, or after the power is restored, the AUTO indicator lights,
automatically OUT (Limit control output terminals between 6-7) is turned ON, and limit control
starts even though the
key has not been pressed or even though External reset input
terminals between 13-14 are not shorted.
While the EXCEEDED indicator is lit, limit control action does not initiate.
Manual start
When the power supply is turned on, or after the power is restored, the RESET indicator lights, and
OUT (Limit control output terminals between 6-7) is turned OFF.
Press the
key, or connect the External reset input terminals13-14. Limit control action will initiate.
However, while the EXCEEDED indicator is lit, limit control action does not initiate.
7.4 A1, A2 action
A1 action
A1 output
+ side
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
High/Low limits alarm
High/Low limit range alarm
Low limit alarm
Process high alarm
Process low alarm
A1 hysteresis
A1 hysteresis
+ A1 set point
A1 set point
SV
setting
High limit alarm
A1 hysteresis
A1 hysteresis
A1 hysteresis
High limit alarm with standby
Low limit alarm with standby
A1 hysteresis
A1 set point
A1 set point
A1 set point
A1 set point
A1 set point
A1 set point
+ A1 set point
+ A1 set point
A1 set point
SV
setting
SV
setting
SV
setting
SV
setting
A1 set point
A1 set point
A1 hysteresis
A1 hysteresis
A1 hysteresis
High/Low limits alarm with standby
A1 action
A1 action
A1 output
A1 output
- side
+ side
- side
+ side
- side
+ side
- side
SV
setting
A1 set point
SV
setting
+ A1 set point
A1 set point
• For A2, read A2 for A1.
• A1 indicator lights when output terminals between 3-4
are ON, and goes off when output terminals between
3-4 are OFF.
• EVT(A2) indicator lights when output terminals between
3-5 are ON, and goes off when output terminals between
3-5 are OFF.
: A1 output terminals 3-4 [EVT(A2) output terminals 3-5] ON
: A1 output terminals 3-4 [EVT(A2) output terminals 3-5] ON or OFF
: A1 output terminals 3-4 [EVT(A2) output terminals 3-5] OFF
: The standby functions.
