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7.2 A3 High/Low limit range alarm action
A1, A2, Ａ3
action
A3 output
A1 output terminals (7, 8): OFF, A2 output terminals (9, 10): OFF,
A3 output terminals (12, 13): ON
A1 output terminals (7, 8), A2 output terminals (9, 10)
A3 output terminals (12, 13): ON or OFF
A1 output terminals (7, 8): ON, A2 output terminals (9, 10): ON,
A3 output terminals (12, 13): OFF
: A1 output is in standby.
A3 High/Low limit range alarm action is determined by setting A1 value and A2 value.
A3 is activated (ON) when both A1 and A2 are OFF – by combining A1 High limit alarm (or high limit with standby
alarm) and A2 Low limit alarm (or Low limit with standby alarm) and vice versa.
When standby function, hysteresis or delay time for A1 and A2 are set, check the below A3 action.
Please note the following:
• If A1 or A2 with standby alarm is selected, A3 is turned ON while A1 or A2 is in standby.
• If A1 or A2 hysteresis increases, A3 ON span decreases.
• When A1 or A2 delay time (setting time) increases, A3 ON time increases.
• If A1 or A2 delay time (setting time) is set, while A1 or A2 delay time is working (when power to the instrument
is turned ON), A3 is turned ON.
High/Low limit range alarm
[Low limit alarm]
A1 (A2) hysteresis
ON
OFF
A1 (Ａ２) value
A1 (A2)
hysteresis
value
[High/Low limit range alarm]
ON
OFF
[High limit alarm]
A2 (A1) hysteresis
A2 (A1)
hysteresis
value
A3 action
21
ON
OFF
A2 (Ａ1) value
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