Mitsubishi MR-508XL Dokumentacja Pobierz pdf (Strona 46)

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Bimba Digital Panel Meter

Basic Connections

Wires 6" Leads Plug

Input Red Blue

Ground Black Black

Output White Brown

Wire Colors

Note: Option card

field connections

are supplied with

the card.

Custom Units Overlay

The meter has a backlighted units indicator that can be custom-

ized to the application. The backlight is turned on by program-

ming the “b-Llt” parameter. Overlays are available in the Units

Label Kit. To install an overlay, remove the unit from the case.

Select the label and apply it to the label frame, noting that the

label must be aligned accurately. Install the label frame to the

display board in the alignment holes located on the right side of

the display.

Plug-In Cards

The meter has three plug-in card slots. Each slot is dedicated to

a specific function. These functions are:

• Setpoint Outputs • Analog Outputs • Communication

Option

The plug-in cards can be used in any combination, however, it is

only possible to use one type of card from each category. Cards

can be installed initially, or at a later date as system needs arise.

Devicenet Plug-In Card

A DeviceNet communication port can be added to the

meter. DeviceNet is a high level bus protocol based upon

the CAN specification. The protocol allows the integration

of devices of different types and manufacturers within a

common communication framework.

Analog Output Plug-In Card

The analog output is available as a Plug-in card. Either

the 20 mA or the 10 V output can be used. The output

can be scaled independent of the input range. Reverse

acting output is possible by reversing the scaling point

positions. Other features are selectable update rate and

output source selection.

RS485 Plug-In Card

An RS485 communication port can be added with a

Plug-in card. RS485 offers multi-drop bus communica-

tions. All devices connect in parallel on a 485 bus. Only

one device is permitted to transmit at any one time, while

all other devices are in receive mode. The meter controls

the bus when it transmits data, otherwise the meter is in

the receive mode.

RS232 Plug-In Card

An RS232 communication port can be installed with a

Plug-in card. RS232 is intended to allow only 2 devices

to communicate to each other (i.e., printer or computer).

For more information, See DPM Serial Application Guide.

Inputs

Voltage Inputs

The Bimba PFC uses the ±20V range (default).

Scaling

The meter has been factory calibrated on all ranges as a basic

multimeter (voltmeter/ammeter/ohmmeter). The basic meter

readout can then be post scaled to read out in the process units

(level, flow, temperature, etc.). The meter provides two ways in

which to scale the display:

Key-in: Key in the input and display scaling points using known

data.

Apply: Apply the actual input value and key in the corresponding

display value. The meter records the input value applied.

For processes that require linearity compensation, up to 16

scaling points can be used for correction. The scaling range is

extended up to five digits of resolution with selectable display

rounding factors.

Input Features

A unique adaptive input filter is used. Whenever the difference

between one reading and the next is less than the filter band

value, the input is filtered. When the difference exceeds the filter

band value, the input is not filtered. This avoids the usual com-

promise between using a relative high time constant for good

noise rejection and using a low time constant filter for quick step

response.

The readout can be corrected for process zero errors with an

offset value. A tare function zeros the readout via a function

operation.

Function Keys and User Inputs

The Function Keys and User inputs can be programmed to

perform specific meter control operations. Function Keys #1 and

#2 each have two types of functions, primary and secondary.

The primary function is executed the instant the key is pressed.

Holding the key for three seconds executes the second function.

If the key is not held for 3 seconds, the second function is not

executed. To implement a hidden key, program no function for

the primary and program the desired function for the second.

The three user inputs can be selected for sinking or sourcing

logic.

Max and Min Reading Detection

The meter records the maximum (max) and minimum (min) pro-

cess inputs. Conditions such as value activation, sudden change

in material flow rate, etc., can result in false peaks which are not

reflective of the true maximum and minimum of the process. In

this case, Max and Min capture delay times can be used to pre-

vent the detection of false maximums and minimums.

N/A

SIGNAL

GROUND

PFC POWE

(INPUT)

PFC

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