11. OTHER PROGRAMMING
11.5 Alarm
Alarm parameters (alarm types, alarm value, etc.) can be programmed for each alarm point (channel, level). By programming the alarm parameters, alarm activation can be displayed and also the activation and reset can be
printed. See Section 10.3. Press SHIFT | and ALARM simultaneously to display the [Alarm] programming screen. |
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Alarm output is an option. The alarm outputs for “FAiL (failure) ” and “C. End (chart paper end)” are available in addition to measured values.
1 Alarm Parameters
The default is no alarm programmed.
1) Alarm points (Channel, level)
Alarm point can be programmed up to level 4 for each channel. “FAiL” and “C. End” can be programmed instead of the channels.
FAiL…Alarm when the hardware except
In this condition, the status lamp is not lit.
C. End…Alarm at just before when the chart paper ends.
2) Alarm types
10 different alarm types can be selected for each alarm point.
Absolute | : High alarm | : Low alarm | |
: High alarm with | : Low alarm with | ||
value | |||
| standby | standby | |
: Increase limit | : Decrease limit | ||
change |
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| : Differential high | : Differential low | |
Differential | alarm | alarm | |
: Differential high | : Differential low | ||
| alarm with standby | alarm with standby |
3) Alarm value
Value for alarm activation
4) Others
Differential alarm: Program channels to be compared.
Relations between alarm
parameters and alarm activation
Absolute value alarm
| 1 | 1 | 1 | 1 | Channel | Alarm |
Alarm | 1 | 2 | 3 | 4 | Level | points |
L | H | H | H | Alarm type |
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0 | 0 | 0 | 0 | (Relay No.)* |
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| 35 | 50 | 60 | 70 | Alarm value | |
0 | Measured value 100 |
(55)
(1)The above figure shows programming alarm point up to level 4 on CH 1.
(2)Alarm is in active at level 2 (high alarm) as the
measured value (55) is higher than the alarm value (50).
*No alarm output is provided to the standard specifications and the relay No. is fixed to “0”. Refer to Section 12.2 for the programming of relay No.
2
Alarm Types
The high alarm for the absolute value activates when the measured value equals to or is higher than the alarm value. The low alarm activates when the measured value equals to or is lower than the alarm value.
For the
Rate-of-change alarm
Increase limit alarm: Change width (PV2 to PV1) per unit
time (∆t) is plus.
Decrease limit alarm: Change width (PV2 to PV1) per unit time (∆t) is minus.
＋alarm value
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Unit time (∆t) = Measuring interval (about 0.1 sec.) x Measuring count (1 to 20)
*Do not apply a “minus” symbol to the alarm value of the decrease limit alarm ().
Alarm with standby
This is the function not to activate an alarm until the alarm becomes in reset condition, even if the alarm is in active condition. This function is only available when the power supply is turned on. When changing parameters, this function is only available by reprogramming it after clearing once.
Differential alarm
(Differential high alarm) | (Differential low alarm) | ||||||||||
Alarm |
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Difference of measured |
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Difference of measured value (absolute value) equals to or is higher than alarm value: Differential high alarm activation Difference of measured value (absolute value) equals to or is lower than alarm value: Differential low alarm activation
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