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Example version
“
2
”
via MODBUS
On controlled group and three switched groups
MODBUS Master
S
ig
n
a
l
Controller
Slave
G1
M
Analog
In
MODBUS
2A
1A (1D+), 1B (D-)
5A
0...100 %
Controller
Slave
G2
M
0 / 100 %
25.08.2016
v_group_var_4_dig_out_cxe_master.vsd
A (D+)
B (D-)
A (D+)
B (D-)
11A
12A
Controller
Slave
G4
M
0 / 100 %
Controller
Slave
G3
M
0 / 100 %
A (D+)
B (D-)
A (D+)
B (D-)
11.09.2014
v_cxe_4_group_digswitch_dia.vsd
80
70
60
50
40
30
20
10
10
20
30
40
50
60
70
80
90
100
0...100 %
0
90
100
G2 ON @ 50 %
nmin @
G3= 30 %
nmin @
G2= 20 %
G2 OFF
nmin @
G4= 40 %
G3 OFF
G4 OFF
G3 ON @ 70 %
G4 ON @ 85 %
M
O
D
B
U
S
O
u
t
[%
]
MODBUS Out
2A = Standard
S
G1
2A
MODBUS Out:
speed setting over MODBUS
S:
Modulation level of the controller in %
G1:
Group 1
G2:
Group 2
G3:
Group 3
G4:
Group 4
G2, G3, G4 ON:
ON Value Group2, 3, 4
G2, G3, G4, OFF:
OFF Value Group2, 3, 4
nmin@G 2, 3, 4:
nmin at Group2, 3, 4
MODBUS Out Standard:
Diagram wihout group control
Function
Group 1 is continuously controlled (0 - 100 %), the other groups are switched on and off depending on
the degree of modulation (0 / 100%).
If the modulation level exceeds the switch-on point
“
ON Value Group2
”
, the MODBUS Master switches
on the second group and the speed of the
fi
rst group is reduced to an adjustable minimal value
“
nmin
at Group2
”
.
Then the speed of the
fi
rst group increases to maximum within the remaining range.
If a third group is programmed up to switch-on point
“
ON Value Group3
”
etc.
Switch-off point
“
OFF Value Group2
”
at diminishing speed requirement.
9.9.10
Display text for external message
Controller Setup
Alternatively to the
“
External Error
”
display when an external message occurs (see IO
Setup / Digital Inputs
“
D1
”
/
“
D2
”
the following error texts can be programmed:
•
EC Motors
•
Filter
•
Frost protection
•
Adiabatik
•
Firealarm
•
Pressure switch
•
Gas alarm
•
Water alarm
•
RCD
•
Exhaust air
External error
External message
RCD
Residual-current-operated protective device
Operating Instructions
UNIcon MODBUS Master
Programming
L-BAL-E255-GB 1901 Index 001
Part.-No.
61/121