YOKOGAWA EXA DO402G, Руководство пользователя

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<5. Parameter setting>
5-20
IM 12J05D02-01E
Code 46 *tI.CNT The integral time for the PI control settings.
Code 47 *EXPIR When a system is set up to control on the relay outputs, the expiry time
can be enabled to warn of an ineffective control. In other words, when
the setpoint is exceeded for more than 15 minutes an error message is
generated. This can mean, for example, that the reagent tank is empty.
Code Display Function Function detail X Y Z Default values
Contacts Settings
44 *D.TIME Dead Time Delay after setpoint passed 0- 2.0 s 0.2 s
*P.HYST Hysteresis Process value hysteresis
0-50 mg/L or 0-300 %
0.1 mg/L
*T.HYST Temp hyst Temperature hysteresis
0- 5 °C (0- 12 °F)
0.5 °C
45 *RANGE Prop. control Proportional range 0- 50 mg/L 5.0 mg/L
*PER. Duty cycle Period/ Duty cycle : 5- 100 s 10.0 s
*FREQ. Frequency Frequency control 50 - 120 per min. 70 p.m.
46 *tI.CNT Integral time Int. time for contacts 10 - 1999 s 100 s
47 *EXPIR Time out alarm Disable time out alarm 0 0
Enable time out alarm 1
*tE.mn time out alarm after 0.5 - 199.9 min 15 min
48-
49
Not used
l
Control and Alarm Functions
Control output (mA): Pl control on the 2nd mA output.
The 2nd mA output can be configured to give a P/I (proportional and
integral) control output.
The setpoint, proportional band and integral time are each fully
programmable.
- Adjustable parameters:
Setpoint, proportional range and integral time.
Process alarm: The contact will be switched when the process value reaches a limit.
This can either be a high or low limit.
- Adjustable parameters:
Setpoint for the process value Hysteresis of the switching action Delay
time of the relay (0 to 200 s)
PI duty cycle control (Fig. 1):
The contact is used to control the time a solenoid valve is opened.
The proportional control is achieved by opening and closing the solenoid
valve and varying the ratio of on and off time (on, off).
- Adjustable parameters:
Setpoint, proportional range and integral time. Total period of the pulse
period (5 to 100 s)
PI pulse frequency control (Fig. 2):
The contact is used to control a pulse-driven pump.
The frequency of pulses regulates the pump speed.
- Adjustable parameters:
Setpoint, proportional range & integral time. Maximum pulse frequency
(50 to 120/min.)
Wash cleaning of sensors (Fig. 3):
Contact S3 is used to control the wash cycle, or as a process alarm.
9th Edition: Aug. 05, 2015-00