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AB Industrietechnik srl – Via Julius Durst, 70 – 39042 BRESSANONE (BZ) Italy – Tel: +39 0472/830626 – [email protected] – www.industrietechnik.it
29. Valve
output
• Fixed point 2-pipe HEATING control (
M02
=0)
The “
HEAT”
icon is displayed to indicate that the heating mode is active.
• The PID type controller operates in the following way for modulating control:
Control temp.
I18
100
0
Output
AO1
WHS
WHS
FRQWUROVHWSRLQWIRU]RQH³6HDVRQRSHUDWLQJVHWSRLQWHFRQRP\KROLGD\PRGH´SDJH
53
$2FRQWUROYDOYH
If the operating temperature falls below
WHS
, the valve starts to open. The icon is displayed.
The valve may be controlled with
- P action (if the integral heating time
I19
=0 and the derivative heating time
I20
=0),
- PI action (if the integral heating time
I19
DQGWKHGHULYDWLYHKHDWLQJWLPH
I20
=0)
- PID action (if the integral heating time
I19
DQGWKHGHULYDWLYHKHDWLQJWLPH
I20
The icon switches off if the
AO1
valve closes.
• The ON/OFF type controller operates in the following way:
100
0
Control temp.
Output
I18
DOx
WHS
WHS
FRQWUROVHWSRLQWIRU]RQH³6HDVRQRSHUDWLQJVHWSRLQWHFRQRP\KROLGD\PRGH´SDJH
53
'2[FRQWUROYDOYH
If the operating temperature drops below
WHS - (
I18
the valve is enabled. The icon is displayed.
If the temperature rises above
WHS + (
I18
the valve is disabled and the icon turns off.
Note: one of the following conditions closes the valve:
• Regulator
OFF
•
&RQWUROVHQVRURSHQRULQVKRUWFLUFXLWRUQRWGH¿QHG
M08
=15 and
M10
=15 and
M12
=15)
•
/LPLWVHQVRURSHQRULQVKRUWFLUFXLWRUQRWGH¿QHG
M08
=15 and
M10
=15 and
M12
=15) of the limit function is enabled
(
I32
DQGRU
I34
•
+LJKWHPSHUDWXUHDODUPIURPFRQWDFWLIDGLJLWDOLQSXWZDVFRQ¿JXUHGDVKLJKWHPSHUDWXUHFRQWDFW
M04
=7 or
M06
=7)
•
High temperature limit alarm (if the high supply limit function is enabled
I34
•
No control requested from all SLAVE_X controllers.
