SMC Networks HRZD020-W1S-W1S, Operation Manual

Page: 121 / 129

HRX-OM-M005
Chapter 8 Appendix
HRZD Series 8.4 Offset Function
8-13
8.4 Offset Function
Potential deviations in temperature between this product and your system may
occur depending on the installation environment. The offset function has three
types (MODE1 to 3) to calibrate any deviations in temperature.
See the following descriptions for the offset function. See section 5.3.29 “CH1(2)
offset setting screen” in “Chapter 5 Product Operation” on page 5-47 for setting.
The fluid temperature value sent communications is the same value as TEMP PV,
which is displayed on the Status screen.
When MODE1 is selected
This mode is used to exercise temperature control to allow the discharge
temperature of the circulating fluid to be “TEMP SP value + OFFSET value”.
TEMP PV value denotes the discharge temperature of the circulating fluid.
E.g.: TEMP SP value: +20°C, OFFSET value: +2°C
→
Circulating fluid discharge temp.:
+22°C, TEMP PV
:
+22°C
When MODE2 is selected
This mode is used to exercise temperature control to allow the discharge
temperature of the circulating fluid to be “TEMP SP value”.
TEMP PV value denotes “Circulating fluid discharge temp. value + OFFSET
value”.
E.g.: TEMP SP value: +20°C, OFFSET value: +2°C
→
Circulating fluid discharge temp.:
+20°C, TEMP PV
:
+22°C
When MODE3 is selected
This mode is used to exercise temperature control to allow the discharge
temperature of the circulating fluid to be “TEMP SP value + OFFSET value”.
TEMP PV value denotes “Circulating fluid discharge temp. value - OFFSET
value”.
E.g.: TEMP SP value: +20°C, OFFSET value: +2°C
→
Circulating fluid discharge temp.:
+22°C, TEMP PV
:
+20°C
When OFF is selected
If no mode is selected, temperature control is conducted to allow the discharge
temperature of the circulating fluid to be “TEMP SP value”.
[Tips]
The “Main screen” on page 5-5allows the checking of the selected offset
mode.