Operating Manual
Document no.: 042036
Version:
V1.1
MC 785T-DF
Client: General
Page:
10 of 20
Function Diagram Cooling/Heating
5.
Operation of relay outputs
5.1
Operation of cooling and heating.
2x cooling:
Cooling 1 (RY2) switches on if the temperature is higher than the
se offset_1
+ differential_1
and switches off if the temperature is lower than
se
offset_1
.
Second stage switches on:
Temperature:
Cooling 2 (RY3) switches on if the temperature is higher than the
se of differential_2
and switches off if the
temperature is lower than
se offset_2
.
Time:
Cooling 2 (RY3) switches on if the set delay time for the second
stage has passed and cooling 1 is still active. Cooling 2 switches
off if cooling 1 switches off.
2x heating:
Heating 1 (RY2) switches on if the temperature is lower than the
se offset_1 -
differential_1
and switches off if the temperature is lower than
se offset_1
.
Second stage switches on:
Temperature:
Heating 2 (RY3) switches on if the temperature is lower than the
se offset_2 - differential 2
and switches off if the
temperature is lower than
se offset_2
.
Time:
Heating 2 (RY3) switches on if the set delay time for the second
stage has passed and heating 1 is still active. Heating 2 switches
off if heating 1 switches off.
Cooling/heating:
Cooling (RY2) switches on if the temperature is higher than the
se
of differential_1
and switches off if the temperature is lower than
se offset_1
.
Heating (RY3) switches on if the temperature is lower than the
se
offset_1 - differential_2
and switches off if the temperature is lower than
se offset_2
.
