Hardware manual PCD7.LRxx-PG5 room controller │ Document 27-653; version ENG07 │ 2019-03-21
Saia-Burgess Controls AG
Communication
5
5-11
RS-485 interfaces (ports 0 + 1) in general
Example 2:
What is the resource requirement for a network with a PCD7.LRxx-P5 room
controller with four HVAC room template applications (for four zones):
4
HVAC (for four zone) room template application
1
PCD7.LRxx-P5
room controller
1
PCD1.E1000-A10
digital inputs
1
PCD1.A1000-A20
digital outputs
1
PCD1.G2000-A20
digital/analogue inputs and outputs
3
PCD1.B5000-A20
digital/analogue inputs and outputs
E-Line FBoxes
Registers Flags Program
size
Size of RAM
data blocks
DB RAM
Non-
volatile
data
(in flash)
[Byte]
[Byte]
[Flags or
registers]
4 HVAC
room templates
1700
1400
70444
866
EL + S-Bus master
196
119
2188
2064
2
3
PCD1.B5000
111
216
17196
336
3
1
PCD1.G2000
70
58
8708
200
1
1
PCD1.A1000
54
124
7012
168
1
Necessary
resources
2131
1917
105548
2768
7
866
% usage of
PCD7.LRxx-P5
53%
48%
82%
28%
7%
87%
In this example, for four zones with five E-Line RIOs, the critical resource would
be the program size, where only approximately 14 kB of the user program is left
for implementing the E-Line RIO logic and serving as the flash for non-volatile data
storage of flags or registers from the application program.
5.3.5.3
Recommendations for use with lighting or blind control
When switching lighting or blind outputs, the response times should not be more
than 250 ms so that a switching command will not be perceived as delayed.
The following points must be observed to achieve this:
●
S-Bus/Modbus setting 115 kbit/s
●
only E-Line modules on second RS-485 (e.g. no energy counters)
●
no more than four E-Line modules on the second RS-485
●
disable the manual operating level for E-Line modules
●
the user program must not be too big so that the PCD7.LRxx-P5 room control-
ler can still process at least 14 cycles per second. This can be achieved with a
normal program of max. 60 kB (approx. 40 Fupla pages filled as normal).
