YOKOGAWA UT750, Instruction Manual

Page: 99 / 108

<Toc> <6. Function Block Diagram and Descriptions>
6-3
IM 05D01B02-41E 1st Edition : May 31,2000-00
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Function Block Diagram for Single-loop Heating/Cooling Control
SPNO
R/L
OT1
A/M
OUTPUT1 OUTPUT1
OT1
DO4 DO3
Relay
or transistor
*4
RS485 DI1 DI2 DI3 DI4 DI5 DI6 DI7 INPUT1 INPUT3
DO6 DO5 DO2 DO1 OUTPUT1 OUTPUT3
RET2 RET1
OUTPUT2
RMS=COM RMS=RSP
Heating/cooling computation
S/R
Heating-side output limiter Cooling-side output limiter
PV input
terminals , and
Remote input
terminals and 12 13 11 22 21 Contact input
Communication
terminals to
and to
27 23
30 28
Input selection
Unit selection
Input selection
Unit selection
Target setpoint selection
Remote setting filter
Communication Aux.Input
Ratio/bias calculation Target setpoints 1 to 8
REMOTE (ON)/LOCAL (OFF) switching
LOCAL REMOTE
Control computation Manual operation
Target setpoint
ramp-rate function
AUTO (ON)/MAN (OFF) switching
AUTO MAN
STOP (ON)/RUN (OFF) switching
Cooling-side
preset output Heating-side
preset output
Heating-side
output
Cooling-side
output
15 V loop
power supply
Retransmission
output
Alarm function
Alarm 1 Alarm 2 Alarm 3 Alarm 4
17 16
Current or pulse
terminals and
Relay
terminals
, and 2 3 1
Current
*3
terminals
and 15 14
Current
*1
terminals
and 17 16
Current
*2
terminals
and 47 46
Terminal Parameter Function
Analog signal Contact signal Front panel key
Legend
Analog input range conversion
Analog input bias
Square root extraction
Analog input filter
Analog input range conversion
Analog input bias
Square root extraction
Analog input filter
10-seg. linearizer approx./bias
PV input bias
PV input filter
OUTPUT3
Current
terminals
and 15 14
*1: Unavailable when heating-side output is current or pulse.
*2: Unavailable for dual-loop controller.
*3: Unavailable when cooling-side output is current or pulse.
*4: Alarm 4 is output via DO4 when cooling-side output is relay.
Alarm 3 is output via DO3 when cooling-side output is transistor.