Micromod MOD: Modcell 2050R Users Guide Manual do Utilizador descarregar pdf (Página 127)

IB-23C650

SETUP

Table 12. Tune Menu

Middle

Display

Bottom

Display

Entry Description

DEADBAND xx.x

0.0 to 50.0%

Percent difference in calculated output and

valve position (input 2) required to actuate

open relay on increasing output or closed relay

on decreasing output.

PREACT xx.x 0.0 to 50.0%

This is the percent overshoot that would occur

is preact were set to zero.

See the Position Proportioning Control

section for information on determining values

for position proportioning deadband and preact.

TIME xxx.x 1.0 to 300.0 seconds

Period of oscillation of output relay. Applies to

time proportioning control and manual

operation of on/off control.

VALUE xx.x 0.1 to 300.0%

Calculated controller output value at which

change from cooling to heating or heating to

cooling occurs.

BNDWIDTH xx.x 0 to crossover value, in % output

Determines the rate of change from heat to

cool proportional bands when a crossover

occurs.

HYST xx.x 0 to 25.0, in % output centered on crossover

value (±25.0)

Determines calculated controller output values

at which both heat and cool outputs are off.

CYC TIME xxx.x 1.0 to 300.0 seconds

Period of oscillation of output relay.

CYC TIME xxx.x 1.0 to 300.0 seconds

Period of oscillation of output relay.

121

1 2 ... 122 123 124 125 126 127 128 129 130 131 132 ... 227 228

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Micromod MOD: Modcell 2050R Users Guide Manual do Utilizador Página 127