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Nr. dis-
Par.
Menu
played
No.
Display
Defines by how many degrees the temperature
Hyst. Down
measured by the primary circuit's probe must fall
M2
77
Start Mod-
below the set-point in order for the subsequent
ule
module to be started after the time interval set by
Par. 75.
Defines by how many degrees the temperature
Hyst. Up
measured by the primary circuit's probe must go
M2
78
Stop Mod-
above the set-point in order for the subsequent
ule
module to be switched off after the time interval
set by Par. 76.
Defines by how many degrees the temperature
measured by the primary circuit's probe must go
Hyst. Down
M2
144
below the set-point in order for the subsequent
Quick Start
module to be started after the time interval set by
Par. 142 (quick-start mode).
Defines by how many degrees the temperature
measured by the primary circuit's probe must go
Hyst. Up
M2
145
above the set-point in order for the subsequent
Quick Stop
module to be switched off after the time interval
set by Par. 143 (quick stop mode).
Defines by how many degrees the temperature
Hyst. Up
measured by the primary circuit's probe must go
M2
146
Stop All
above the set-point in order for all "On" modules
to be switched off at the same time.
Number of
Defines the number of modules of which the cas-
M2
147
Units
cade consists.
Defines the cascade operation mode.
0 = Disabled
Power
M2
148
1 = Not applicable
Mode
2 = Maximum number of burners
3 = Minimum number of burners
Defines the maximum decrease in the primary
Max. Setp.
M2
79
circuit's cascade set-point. Is based on the primary
Offset Down
circuit's probe reading.
Defines the maximum increase in the primary
Max. Setp.
M2
80
circuit's cascade set-point. Is based on the primary
Offset Up
circuit's probe reading.
Defines the time in minutes from the moment the
Start Mod.
demand is triggered until the activation of the set-
M2
81
Delay Fact.
point increases or decreases provided for by Par. 79
e 80.
It defines the minimum power for at least one of
Next Mod-
the modules in the cascade in order for the next
M2
82
ule Start
module to be switched on (if the other conditions
Rate
linked to Par. 75 and 77 are met).
It defines the maximum power for all the modules
Next Mod-
in the cascade in order for the last module on to be
M2
83
ule Stop
switched off (if the other conditions linked to Par.
Rate
76 and 78 are met).
Module
It defines the time interval (in days) after which
M2
84
Rotation
modules are rotated.
Interval
Establishes the number of the next module to be
First Mod-
M2
149
rotated (this value is automatically updated at each
ule to Start
rotation).
Defines the proportional term to change the set-
M2
86
PID P
point of the cascade module.
Defines the integral term to change the setpoint of
M2
87
PID I
the cascade module.
Defines the speed (in °C/100 ms) with which the
set-point of individual modules is increased in the
PID Slew
M2
150
event the primary circuit's set-point is not achieved
Rate Up
(if the value is set to zero, the change is controlled
by the PI of Par. 86 and87 without restrictions).
Description
39
Default set-
Range
ting
0...40
5
0...40
4
0...40
20
0...40
6
0...40
8
1...8
8
0...3
2
0...40
2
0...40
5
0...60
60
Min.
10...100
80
10...100
25
0...30
1
Days
1...16
1
0...1275
50
0...1275
500
0...25.5
1
INSTALLATION
Access
UM
Category
type
°C
I
Cascade
°C
I
Cascade
°C
I
Cascade
°C
I
Cascade
°C
I
Cascade
I
Cascade
I
Cascade
°C
I
Cascade
°C
I
Cascade
I
Cascade
%
I
Cascade
%
I
Cascade
I
Cascade
I
Cascade
O
Cascade
O
Cascade
O
Cascade
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