Saia-Burgess Controls AG
Manual for PCD7.L79xN room controllers
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Document 27 / 602
E
N02 │ 2013-11-27
Registers, configuration
Register usage
5-1
5
5
Register usage
This section describes the register usage on the compact room controllers. Detailed
knowledge of this is not required to use the FBoxes. Rather, the section is aimed at
interested persons and programmers.
5.1
Registers, configuration
(* = EEPROM parameters)
Registers
Description
Communication
14*
S-Bus telegrams, defines a minimum time for the compact room controller to wait
before responding to a request telegram from the master. Unit: [ms/2000]
Range: 100
…
2300 default: 2000
15*
S-Bus baudrate; as the controller works with automatic baudrate detection, this
parameter has no effect in practice.
(73=4
800; 36=9
600; 18=19 200; 9=38 400; 21=115 200)
40
Communication watchdog register.
255
no monitoring
0
Stop/restart control
(Function dependent on configuration of register 112)
1...254 Counter decremented by 1 for every program cycle (20 s). The S-Bus master has
to load the register on a cyclical basis.
(Where the value "1" is entered, the controller will stop/restart in max. 20 seconds)
60
Time, in 20-second steps, during which a further S-Bus station address 252 is
activated. The time is initialised to 15 minutes by operating the service pin. Every
successful communication within the period restarts the time for another 15
minutes. When the counter runs down to 0 or the register is manually set to 0,
address 252 is deactivated again.
110
S-Bus station address
111
Active RS-485 Bus connection.
RS-485 leads must be connected as lines. Stubs are not allowed, and both ends
of the line must be "closed off" with a resistor (approx. 150 Ω) between strands D
and /D.
The best signal quality is achieved with an active Bus connection with a resistor
b5V and GND.
+5 V
+5 V
/RX-/TX
RX-TX
/D
/n
D
n
/n
n
/n
n
PCD1/2.Mxxx
Socket A
Pull up
330 Ohm
Pull down
330 Ohm
Segment lenght max. 1200 m
max. 32 stations
Termination
Resistor
150 Ohm
The active Bus connection is switched on and off via the Configuration register.
0
No Bus connection (default setting)
1
Active Bus connection enabled