Table of Contents
Siemens Building Technologies
HVAC Products
21
Function block LPB parameters
21.1
Operating lines
Line
Function, parameter
131
Device number for bus address
132
Segment number for bus address
133
Clock mode
134
Bus power supply, operating mode and status indication
135
Outside temperature source
136
Gain of locking signal
137
Response to uncritical locking signals from the data bus
146
Pump kick
21.2
LPB parameters
21.2.1 Addressing the devices
Each device connected to the data bus (LPB) requires an address. This address is
comprised of a device number (1...16, operating line 131) and a segment number
(0...14, operating line 132).
In an interconnected plant, each address may be assigned only once. If this is not ob-
served, proper functioning of the entire plant cannot be ensured. In that case, an error
message will be generated (error code 82).
If the controller is operated autonomously (with no bus), both the device number and
the segment number must be set to zero.
Since the device address is also associated with control processes, it is not possible to
permit all possible device addresses in all types of plant:
Primary controller plant types 5–x, 6–x and 7–2 must be given device number 1.
If an inadmissible address has been entered for the selected type of plant, an error
message will appear (error code 140).
For detailed information about the addressing of devices, refer to Data Sheet N2030.
21.2.2 Source of time of day
Depending on the master clock, different sources for the time of day can be used. The
source must be entered on the controller on operating line 133, as a digit (0...3):
0 = autonomous clock in the RVD230
1 = time of day from the bus; clock (slave) with no remote readjustment
2 = time of day from the bus; clock (slave) with remote readjustment
3 = time of day on the bus; central clock (master)
The effect of the individual entries is as follows:
Input
Effect
• The time of day on the controller can be
0
readjusted
• The controller's time of day is not matched
to the system time
• The time of day on the controller cannot be
1
readjusted
• The controller's time of day is automatically
and continually matched to the system time
Basic Documentation RVD230
21 Function block LPB parameters
Unit
Factory
Range
setting
0
0...16
0
0...14
0
0...3
A
0 / 1 / A
A
A / 00.01... 14.16
%
100
0...200
1
0 / 1
1
0 / 1
Adjustment
System time
Controller time
Adjustment
Controller time
System time
CE1P2383en
27.05.2004
81/130
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