Example version
“
1
”
: Two controlled groups
MODBUS
Master
S
ig
n
a
l
Controller
Slave
G1
M
Analog
In
0 – 10 V
Analog
In
2A
Analog Out
A1
5A
Analog Out
A2
0...100 %
Controller
Slave
G2
M
Analog
In
0...100 %
0 – 10 V
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v_2nd_gr_analog_cxe_master.vsd
Second Group over analog out-
put
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 %
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v_2nd_gr_modbus_cxe_master.vsd
A (D+)
B (D-)
A (D+)
B (D-)
Second Group over MODBUS
output
11.09.2014
v_cxe_2nd_group_analog_modbus_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
Analog / MODBUS Out
2A = Standard
nmin @ G2 = 20 %
Analog / MODBUS Out
@ G1 = 2A
Analog / MODBUS Out
@ G2 =
5A
x1
x
1.
4
G 1
G 2
G2 ON = 50 %
G2 OFF = 45 %
A
n
a
lo
g
O
u
t
[V
]
1
2
3
4
5
6
7
8
9
1
0
M
O
D
B
U
S
O
u
t
[%
]
S
MODBUS Out:
speed setting over MODBUS
Analog Out:
speed setting over analog output 0 - 10 V
G1:
Group 1
G2:
Group 2
S:
Modulation level of the controller in %
G 2 ON:
Group 2 ON value
G2 OFF:
OFF Value Group2
nmin @ G2:
nmin at Group2
Analog / MODBUS Out Standard:
Diagram wihout group control
Function
If the modulation level of the controller exceeds the switch-
on point of group 2 (On Value Group2), group 1 is reduced
to
“
n-min at Group2
”
. From here on both groups run parallel
at maximum power.
If group control is activated (Function =
|
5A
|
) the gradient of
the output curve of group 1 is automatically increased by
factor 1.4 (gradient without group control = 1).
9.9.9.2
Variant
“
2
”
: One controlled group and up to three switched groups
The programming described below applies equally for group control by analogue outputs, relay
outputs and MODBUS.
For group control by the analogue outputs
“
A1
”
/
“
A2
”
and the relay outputs
“
K1
”
and
“
K2
”
, the
available outputs must be observed in the selection of the version (combinations are possible).
Example: Required assignment for a controlled and a switched group
•
For activation by analogue output (see IO Setup) or MODBUS (see MODBUS Master)
–
Function
|
A
|
for group 1 (0 - 100 % controlled)
–
Function
|
5A
|
for group 2 (0 / 100 % switched)
•
For activation of Group 2 by relay (see IO Setup)
–
Function
|
A
|
for group 1 (0 - 100 % controlled)
–
Function
|
8K
|
for group 2 (ON / OFF switched)
The function
|
11A
|
must be allocated additionally to Group 3 for one controlled and two switched
groups.
The function
|
12A
|
must be allocated additionally to Group 4 for one controlled and three switched
groups.
Controller Setup
Group 2 ON value
Switch-on value for Group2
Setting range: 0 - 100 %
Factory setting: 50 % *
50 %
Group 2 ON value
Controller Setup
OFF Value Group2
Switch-off value for group2
Setting range: 0 - 100 %
Factory setting: 45 % *
45 %
OFF Value Group2
Operating Instructions
UNIcon MODBUS Master
Programming
L-BAL-E255-GB 1901 Index 001
Part.-No.
59/121