0BChapter 3
Functions
3-12
Functions
unctions
Alarm output
Alarm output
• Alarm output upper/lower limit threshold, alarm output hysteresis, alarm output on-delay
can be set.
• Alarm output upper/lower limit threshold, alarm output hysteresis, alarm output on-delay
can be set.
• Setting hysteresis can prevent frequently turning ON/OFF an alarm even when a
measurement value varies near the alarm output judgment value.
• Setting hysteresis can prevent frequently turning ON/OFF an alarm even when a
measurement value varies near the alarm output judgment value.
• On-delay is a function that keeps the output OFF for the specified hours and minutes. Set
an optimum value.
• On-delay is a function that keeps the output OFF for the specified hours and minutes. Set
an optimum value.
• Setting the upper limit threshold of each alarm to the maximum value turns the upper limit
alarm function OFF, while setting the lower limit threshold to the minimum value turns the
lower alarm function OFF. The setting should be made to use only either upper limit alarm
or lower limit alarm.
• Setting the upper limit threshold of each alarm to the maximum value turns the upper limit
alarm function OFF, while setting the lower limit threshold to the minimum value turns the
lower alarm function OFF. The setting should be made to use only either upper limit alarm
or lower limit alarm.
* Do not use the alarm output function in cases related to safety, e.g., machine control, etc.,
because the function is assumed to detect errors and call attention by sounding a buzzer
or lighting a lamp.
* Do not use the alarm output function in cases related to safety, e.g., machine control, etc.,
because the function is assumed to detect errors and call attention by sounding a buzzer
or lighting a lamp.
z
Alarm history
z
Alarm history
Histories of alarms generated in the past can be confirmed via communication.
Histories of alarms generated in the past can be confirmed via communication.
Histories of only 20 alarms generated in the past can be read. If the number of alarms
generated exceeds 20, histories are deleted from the oldest one.
Histories of only 20 alarms generated in the past can be read. If the number of alarms
generated exceeds 20, histories are deleted from the oldest one.
Alarm type, and time of alarm generation: The circuit in which an alarm was generated, and
the time of generation are saved at first.
Alarm type, and time of alarm generation: The circuit in which an alarm was generated, and
the time of generation are saved at first.
Alarm release time:
Saved when all circuits to be judged have been
alarm-released.
Alarm release time:
Saved when all circuits to be judged have been
alarm-released.
z
Time chart of alarm output function
z
Time chart of alarm output function
With on-delay setting, without hysteresis setting
With on-delay setting, without hysteresis setting
*1. Turn the alarm output OFF if the state remains OFF continuously in on-delay hour/minute and
alarm judgment.
*1. Turn the alarm output OFF if the state remains OFF continuously in on-delay hour/minute and
alarm judgment.
z
Active input setting
z
Active input setting
PMU1A
PMU1A
(Electric
power)
(Electric
power)
PMU2A
PMU2A
(Power
two-system)
(Power
two-system)
EMU8A
EMU8A
(Pulse/temperature)
(Pulse/temperature)
CTD8E
CTD8E
(CT
expansion)
(CT
expansion)
{
{
{
{
O: With setting
• Sets input that performs alarm judgment.
• Since 1 bit corresponds to 1 input, bits 0 to 7 correspond to inputs 1 to 8.
• Even if input whose bit is set to 0 (OFF) is a target for alarm, it is not judged as an alarm.
• The number of CT inputs per circuit differs depending on phase wire. In that case, if one of
the CT inputs within the circuit is set to 1 (ON), it is judged as a target for alarm. For the
inputs to be used, refer to the table below and Section 2.4 "Input/output configuration and
example of wiring diagram."
• Setting range H’00000000 to H’000000FF (Initial value: H’000000FF)
Input 1
Input 2
Input 3
Input 4
Input 5
Input 6
Input 7
Input 8
PMU1A (Electric
power)
CT input 1
CT input 2
CT input 3
PMU2A (Power
two-system)
CT input 1
CT input 2
CT input 3
CT input 4
EMU8A
(Pulse/temperature)
Thermistor
input
CTD8E (CT
expansion)
CT input 1
CT input 2
CT input 3
CT input 4
CT input 5
CT input 6
CT input 7
CT input 8
上限閾値
下限閾値
上限警報判定
定
下限警報判定
オンディレー判
＊
1
＊
1
上限警報出力
下限警報出力
Upper limit threshold
Lower limit threshold
Upper limit alarm judgment
Lower limit alarm judgment
On-delay judgment
Upper limit alarm output
Lower limit alarm output
