Siemens HydroRanger 200 Instruction Manual download pdf (Page 78)

Page 64 HydroRanger 200 – INSTRUCTION MANUAL 7ML19981FC01

mmmmm

External Totalizers and

Flow Samplers

External Totalizers and Flow Samplers

External totalizers are simple counters which count the number of relay clicks produced

by the HydroRanger 200. This is generally used to keep track of OCM or pumped volume

totals. Note that both of these values are also stored in the HydroRanger 200 and are

available through communications.

Flow samplers are devices which take a sample of liquid when triggered by a relay click.

These samples are used to monitor water quality over time. Flow samplers can be driven

by OCM volume or by relay click volume settings depending on the application

requirements.

Relay Contacts

Pumped volume is calculated at the end of the pump cycle. Totalized volume given

through a relay set up for totalizer (P111[r]=40) will be given in bursts at this time.

Both the open and closed times for the relay contact are provided by P645 and are preset

to 0.2 seconds. Partial units are added to the next pump cycle.

Example

Shows a relay set up to make one contact for every cubic metre (m

) of liquid.

Totalizer

To set the totalizer to provide relay contact to an external counter, use the following:

Counter Formula

1 Contact per 10

P640

units

P640 is preset to 0 so the default number of

contacts for a pumped volume cycle is

equivalent to the number of volume units.

P645

Pump Cycle

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 255 256

No comments

Siemens HydroRanger 200 Instruction Manual Page 78