PULSAR MEASUREMENT
97
Digital Inputs
About Digital Inputs
The digital inputs are used to provide the Zenith with information on the
operational status and condition of pumps, valves, and other process control
devices. Based on the information supplied, by the inputs, the Zenith, will
make intelligent decisions and modify its control regime to meet the
demand of the prevailing operational requirements.
The parameters used to program the Digital inputs are as follows:
Common Parameters P300 to P306
Digital Input 1 P372 to 374 Digital Input 2 P375 to 377
Digital Input 3 P378 to 380 Digital Input 4 P381 to 383
Digital Input 5 P384 to 386 Digital Input 6 P387 to 389
Digital Input 7 P390 to 392
Common Parameters Set-up
These parameters determine specific operational criteria for particular digital
input functions and are common to each digital input.
Input Type
The digital inputs can be either voltage source, where Zenith will supply the
switching voltage, or voltage synch, where the switching voltage is supplied
by the input from the device, for full details see Chapter 2 Installation. Both
voltage source and voltage synch. inputs can be configured for N.O. or N.C.
operation as determined by the digital input Type P372, 375, 378, 381,
384, 387, 390 when set to 1= Input N.C., Zenith will recognise a closed
condition, D.C. signal voltage present at input, as a healthy condition,
alternatively, an open condition, D.C. signal voltage isn’t present at input,
indicating a healthy condition, can be chosen as a valid input by selecting
2=Input N.O.
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