User manual
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ACOWA INSTRUMENTS, Industrivej 10, 8305 Samsø - VAT-no: 36562919 – mail: [email protected] – Phone: +45 7221 7979
Following functions for DI1-2 can be choosen:
Standard DI: Can be used to count pulses or examine the state of a desired digital signal.
Intensity: Used in connection with rain gauges, where you can read the following values: Total heart rate
counter, today counter and yesterday counter. The values can be read on register adr. 256, 258, 260
Dry running: Used together a digital switch for indication of dry running conditions. When activated, the
pump is stopped. Status for the dry run mode can be read in the Pump Status word 70 bit 23.
High-level switch: Used as a start signal for “running blind” control of pumps if, for example, the level
transmitter is faulty. The condition of the high-level switch can be read on the PUMA status word 70: bit 26.
(“Running blind” control function version 2, see page 32.)
“Running blind” pump control function: The pump control has 2 different internal functions for this.
Function 1. The “Running blind” control function is activated in case the level sensor falls outside its normal range
<3.5 mA,> 23 mA. If this happens, it is assumed that the measuring equipment is defective, and the pump control
will instead use the high-level switch to start/stop the pumps. In case of activation of the level switch, the pump
starts according to the usual pump operation settings. The pump then run with a user-specified lead-in time.
Function 2. The hysteresis is the dead band that is around the last measured level, and if the level remains in this
measuring range / dead band, for a user-selected time (in seconds), then this is a possible “Running blind” control
situation. If the high tide switch is now activated, the “Running blind” control function is triggered and the pump
starts and runs with a custom lead time. If the level changes out of the hysteresis range, the "time" is reset and a
new dead band time must occur to make control ready for a possible emergency control.
Level switch: Used for starting / stopping the pump. Here, a given lead time for the pump before stopping is
selected. (The lag time is set to 20 seconds by default)
Digital outputs
DO 1-2 are relay outputs that can be used for special functions.
The functions of the outputs can be set in AcowaZoo when DO1-2 is
selected in the Settings option. DO1-2 contains the following settings:
ISettings for DO 1-2
Function
Description
Function
Additional functions
See description below
Constant or timed
Choose if DO should be activated for a given period
On-timer stated in seconds.
Summary of Contents for PUMA
Page 1: ...PUMA User manual ...
