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Specifications
3.1 H-LINK
CSNET WEB v3 adds compatibility with the new version of H-
LINK communication called H-LINK 2 while maintaining full com-
patibility with current H-LINK (H-LINK 1) units.
Connection of both H-LINK 1 and H-LINK 2 units in the same H-
LINK unit is possible considering the unit limitations and addres-
sing.
H-LINK 2 communication system adds new addressing for up
to 64 Refrigerant Address and up to 64 Indoor Unit Address per
each Refrigerant Address.
Also H-LINK 2 adds increased number of devices up to a maxi-
mum of 200 devices in the H-LINK 2 line. It is considered as a
device a CSNET WEB, an indoor unit, an outdoor unit or other
devices with H-LINK address.
PC-A1IO, KPI or DX-Kit count as a normal indoor unit.
The limitation of Indoor units is 160 at maximum, and for the Out-
door units are 64.
When there is a central control device like CSNET WEB, maxi-
mum number of total units (Indoor and Outdoor units) is 176.
Maximum Indoor Unit Quantity
Maximum indoor unit quantity
160
140
120
100
80
60
40
20
0
1
4
8
12
16
20
24
0 PSC-5HR
64
160
160
160
160
156
152
1 PSC-5HR
64
156
152
148
144
140
136
2 PSC-5HR
64
140
136
132
128
124
120
3 PSC-5HR
64
124
120
116
112
108
104
4 PSC-5HR
64
108
104
100
96
92
88
3.1.1 Compatibility with Central Stations
CSNET WEB is now compatible with PSC-A64GT & PSC-A64S
central stations.
By switching on the Pin 7 of the option dip-switch, CSNET WEB
activates the compatibility with the central stations.
CSNET WEB has preference over the central stations. If CSNET
WEB is set in central mode a unit and Central Station tries to
send an order, CSNET WEB will overwrite the order and restore
the state of the unit that CSNETWEB has known.
If CSNET WEB has configured the remote switch not available
of a unit, the Central Station will not be able to remove that con-
figuration.
If CSNET WEB has configured the remote switch not available
of a unit, the Central Station will not be able to remove that con-
figuration.
3
PMML0164A rev.2 - 10/2012
28
32
36
40
44
48
52
56
60
64
148
144
140
136
132
128
124
120
116
112
132
128
124
120
116
112
108
104
100
96
116
112
108
104
100
96
92
88
84
80
100
96
92
88
84
80
76
72
68
64
84
80
76
72
68
64
60
56
52
48
A part of this, H-LINK line length could be up to 1000 meters, they
could be increased to 5000 meters using up to 4 PSC-5HR. Each
of them adds 1000 meters to the line, but it affects to the capacity
of the line.
Each H-LINK line repeater (PSC-5HR) counts as 16 indoor units.
Resume:
Outdoor units
Indoor units
Units (outdoor and indoor)
H-LINK Devices
Considering the previous maximums and the number of PSC-
5HR, the maximum number of connectable devices with one cen-
tral control, on that case CSNET WEB, is shown on the following
table and graphic.
CSNET WEB v3 maintain compatibility with water chillers. Re-
member that water chiller and packaged units cannot be connec-
ted to the same H-LINK line.
CSNET WEB v3 requires DSW setting configuration to select bet-
ween chiller and package.
0 PSC-5HR
1 PSC-5HR
2 PSC-5HR
3 PSC-5HR
4 PSC-5HR
C A U T I O N
• When this function is enabled, CSNET WEB requires a Cen-
tral Station to communicate with the units. If there is no Cen-
tral Station controlling some unit, it will cause important H-
LINK communication problems.
• At Central Station compatibility mode, CSNET WEB does not
detect the RCS Sensor, so it will not be displayed on system
status and it will not be available to select as an input on the
auto cool/heat operation.
• There are some variables in system status like liquid or gas
temperature that will only be displayed after a value change.
Those values are only asked by CSNET WEB after the chan-
ge value, so after starting CSNET WEB they will be displayed
as 0 until their value changes.
Maximum number
64
160
176
200
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