Chino KP 2000 Series, Instructions Manual

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10-8. Output 2
Output 2 system of the controller is made for heating and cooling and has two types of systems PID system
and SPRIT system.
Understand each system properly and then select the appropriate one.
1. PID system
･
It is a system for setting PID of output 2 and gap between output 1 and output 2.
･
Usually, consider output 1 as heating operation and set 'direct/reverse controlling operation' of mode 4 as
'REVERSE' and consider output 2 as cooling operation and set controlling operation as 'DIRECT'.
･
Gap is as shown in the figure below. It is called the gap between SV and 0% of output 2 (For proportion
band).
･
When both output 1 and output 2 are PV=SV, if you want output to be 50% (When I operation and D
operation are not included), it can be done by requesting a gap G (%)= -P/2 (P: Proportion band of output 2,
output 2 is direct operation).
2. SPRIT system
･
In matching box calculation system, PID calculation result of output 1 is considered as base and the
operation shown in the following figure takes place.
･
Setting range is 0-60% for DIRECT and 40-100% for REVERSE.
･
When output 1 is set ‘REVERSE’ in setting of ‘direct/reverse controlling operation’ of mode 4, output 2
performs ‘REVERSE’ operation. When output 1 is set ‘DIRECT’, output 2 performs ‘REVERSE’.
100
PID calculation result for output 1
Cont
rol out
pu
t
REVERSE
DIRECT
40
－
100
％
0
－
60
％
0
（％）
50
0 50 100
（％）
Proportion band
SV
0
Control outp
ut
Output 1 Output 2
Gap
PV
100
（％）
50