Owner's Manual

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28 Owner’s Manual for Power Zone Connectivity Server

Installation and Operation

Analog I/O

Analog I/O is based on the similar Channels and

Functions system used by the Digital I/O.

Analog inputs usually come preprogrammed from the

factory. An analog input (to the program) can be a real

physical analog input or it can be a computed (or derived)

input. For example, kW can be an analog input to the

program, but it is computed (derived) based on multiple

measurements, not read from an input pin. Analog inputs

can also come from modules attached to the Power Zone

system via CAN bus.

Analog inputs are automatically mapped to certain places

and used within the program (see “Analog Input

Mapping” diagram below). Further custom mapping such

as an input to an output can be performed as desired.

Mapping is performed by channel number.

Physical analog inputs (inputs that have a physical pin)

can be of different hardware types:

• 0-1 V

• 0-5 V

• 0-10 V

• Resistive

• 4-20 mA

The hardware must be set up to accommodate each of

these inputs.

Analog readings from sensors often need to be

converted from raw A/D counts to usable units. This can

be performed by applying a simple "Mx+B" calibration

equation, using an up to 10 point translation table, or

combining the calibration equation and a translation

table.

Analog Input (AIN) Setup

1. See Figure 3-61. Select an unused channel ID by

selecting the analog input channel name in the

Analog Input Diagnostics screen.

Figure 3-61. Analog Input (AIN) Diagnostics Screen

2. See Figure 3-62. Select the input source (a pick

list will be displayed of physical, derived or CAN

bus inputs) (A).

3. Select the function code (B).

4. Select the sensor type (see sensor datasheet if

unknown) (C).

5. If the sensor is a resistive type, select a pull up

resistor (D). You may need the Generac tool in

conjunction with the sensor datasheet to choose

this. The pullups are used when the sensor is a

passive resistance to ground. The pullup value is

selected based on the resistance range of the

sensor.

6. Click the “Enable” checkbox (E) to enable the

channel. If you are not using the channel, do NOT

check “Enable”, as it slows down the processing

time.

7. Apply filtering (F) to the reading if necessary. The

larger the number entered, the slower the

response will be. See Table 2 for time constants on

the filters.

8. Choose the way the reading is translated (raw,

calibration and/or table) (G).

9. If the reading is to be calibrated, enter the

appropriate “M” and “B” values (H) and (I).

10. Click “Apply Changes” (J).

Figure 3-62. Analog Inputs (AIN) Setup

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