Micromod MOD: Modcell 2050R Users Guide - Manual (Page 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.
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