YOKOGAWA UP55A - Chapter 10 Output (Control And Retransmission) Functions; Setting Control Output Type

10-1
IM 05P02C41-01EN
Output (Control and Retransmission) Functions
10
10.1 SettingControlOutputType
Description
TimeProportionalRelayOutput/TriacOutput/TimeProportionalVoltage
PulseOutput
In time proportional output, the control computation result is output in the form of an
on/off signal pulse width proportional to the time. The pulse width is calculated as follows
with the cycle time (control output cycle) at 100%.
Controloutputpulsewidth=Controloutput(%)xCycletime
The output type is selected as either the relay/triac output or the voltage pulse output.
100
0
0.0 50.0 100.0
ON
OFF
PV
TC
UP55A
Heater
Tank
SSR
ON/OFF signal
pulse output
Displayed output value (%)
On-time ratio
ON
OFF
Ristricted to the range
between output high
limit and output low
limit values.
► Cycletime:10.2SettingControlOutputCycleTime
CurrentOutput
In current output, the control computation result is output as a current signal. (Example of
4 to 20 mA)
20 mA
4 mA
0.0 100.0
TC
UP55A
PV
Heater
Furnace
Displayed output value (%)
Control output
Control output
Thyristor unit
Ristricted to the range
between output high
limit and output low
limit values.
ON/OFFOutput
ON/OFF control compares the SP and PV and outputs an on or off signal according to
the positive or negative deviation (PV – SP).
Chapter10Output(ControlandRetransmission)Functions