A-96.250.211 / 171121
AMI Sodium P
Program List and Explanations
107
5.3.2.50
Delay:
Duration, the activation of the alarm relay is retarded after the
measuring value has risen above/fallen below the programmed
alarm.
Range. 0–600 sec
The relays may be used to drive control units such as solenoid
valves, membrane dosing pumps or motor valves. When driving a
motor valve both relays are needed, relay 1 to open and relay 2 to
close the valve.
5.3.2.22
Parameter:
Choose on of the following process values.
Sodium 1
Sodium 2
pH
Temperature
Sample flow)
5.3.2.32
Settings
:
Choose the respective actuator:
Time proportional
Frequency
Motor valve
Examples of metering devices that are driven time proportional are
solenoid valves, peristaltic pumps.
Dosing is controlled by the operating time.
5.3.2.32.20
Cycle time:
duration of one control cycle (on/off change).
Range: 0–600 sec.
5.3.2.32.30
Response time:
Minimal time the metering device needs to react.
Range: 0–240 sec.
5.3.2.32.4
Control Parameters
Range for each Parameter same as
5.2.1.43, p. 102
Examples of metering devices that are pulse frequency driven are
the classic membrane pumps with a potential free triggering input.
Dosing is controlled by the repetition speed of dosing shots.
5.3.2.32.21
Pulse frequency:
Max. pulses per minute the device is able to re
-
spond to. Range: 20–300/min.
5.3.2.1
Function = Control upwards/downwards:
5.3.2.32.1
Actuator = Time proportional
5.3.2.32.1
Actuator = Frequency
