Kofloc 8700 MC, Инструкция по эксплуатации

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MJ400306A1
22
(2) Using the upper/lower limit alarms(controller type)
Overview of the upper/lower limit alarm action:
When PV: instantaneous flow rate (blue line) changes largely relative to SV: set flow
rate (green line) as time passes, the flow rate alarm is judged.
ＯＮ
流量アラーム
ＯＦＦ
ＡＬ．Ｈｉ
ＳＶ
AL.Lo
流量
時間
ＡＬ．ｄｔ
ＡＬ．ｄｔ
AL. Hi : Flow rate alarm upper limit value （ D-15 ）
AL. Lo : Flow rate alarm lower limit value （ D-16 ）
AL. dt : Flow rate alarm delay time （ D-17 ）
SV : Set flow rate (green line)
PV : Instantaneous flow rate (blue line)
① Upper limit alarm
When the “PV value” exceeded the “SV value + AL. Hi”, the flow rate alarm is turned
on after the passage of “AL. dt”.
② Lower limit alarm
When the “PV value” dropped below the “SV value – AL. Lo”, the flow rate alarm is
turned on after the passage of “AL. dt”.
※ The above action is limited to the case where “00 : Control continue” has been
selected in “D-14 :Selection of action when flow rate alarm occurs”.
If “01 : Forced to fully closed” is selected, the valve fully closing action will start
when a flow rate alarm occurs. In this case, PV: Instantaneous flow rate is set to
zero, but the alarm indication and output continue.
Time
Flow rate alarm
Flow rate