Siemens Pacemaker UM344-2 Uživatelský manuál stáhnout pdf (Strana 159)

UM344-2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS

September 1995

A.0 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS

A.1 SENSOR INPUT BLOCK

Input Type............... MV (Wide/Narrow), OHM (Wide/Narrow)

RTD (PT 100 OHM DIN, PT 100 OHM US,

PT 200 OHM DIN, PT 200 OHM US,

PT 500 OHM DIN, PT 500 OHM US),

T/C (J/K/E/T/R/S/B/N)

T/C and RTD Measured Variable Units......................... Celcius

Fahrenheit

Rankin

Kelvin

Millivolts (mV input only)

Ohms (Ohm input only)

Measured Variable Range Lo ...................... -999999 to 999999

Measured Variable Range Hi ....................... -999999 to 999999

Damping Time Constant ................................. 0 to 120 seconds

Burnout Direction ...................................... Upscale/Downscale

This function block allows the user to determine the range and the units in which the sensor will measure

the sensor input. Range and span limits are dictated by a transmitter's sensor.

Also included is a digital filter for removing process and sensor noise.

A.2 OPERATOR DISPLAY BLOCK

Process Variable Units ............................... 4 Character ASCII

Process Variable Range Lo ............................. -19999 to 19999

Process Variable Range Hi ............................. -19999 to 19999

Auto Rerange ............................................... Enable or Disable

Local Display Code .................................... Measured Variable,

Percent, or Process Variable

Use this function block to set up Process Variable Ranges and Units to improve the understanding of the

Measured Variable. The Process Variable differs from the Measured Variable. As stated in the previous

function block description, the Measured Variable in actual physical units such as ohms, and the Process

Variable can be shown in units that represent the actual process parameter being measured such as

Temperature (deg C). The output display code determines which variable will be displayed on the digital

meter. There are three options for the output display code:

1. Measured Variable - When measured variable is selected, the input will be displayed in measured

variable units.

2. Percent - When percent is selected, the input will be displayed as 0-100% of the process variable

range.

Sensor Input

Measured Variable

Range

Digital Filter Time Con.

Burnout

Input

Output

Process Variable Range

Display Code

Auto Reranging

Operator Display

1 2 ... 154 155 156 157 158 159 160 161 162 163 164 ... 182 183

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