Siemens RS-485 - Manual (Page 12)

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Siemens Building Technologies CC1A7865.1en
HVAC Products 31.10.2002
Description of operating modes
Parameter «RemoteStatus» is used to switch between the operating modes «LOCAL»,
«REMOTE SETPOINT» and «FULLY REMOTE». The change is always accomplished
via the MOD bus.
In the event the master fails or communication is lost, the RWF40... will switch to oper-
ating mode «LOCAL». The time for detecting a failure is set via the interface.
Remote
parameter Default after
«Power-up»
REM Operating mode «LOCAL», «REMOTE SETPOINT» or
«FULLY REMOTE» = 0
SPR Setpoint remote = SP1
RHYS1 Switch-on threshold remote = Hys1
RHYS2 Lower switch-off threshold remote = Hys2
RHYS3 Upper switch-off treshold remote = Hys3
ROFF Controller ON (0) / OFF (1) in operating modes
«REMOTE SETPOINT» and «FULLY REMOTE» = 0 ¹ )
RSTEP Number of control cycles (opening / closing) (FULLY
REMOTE) = 0 ² )
RK1 Release of burner (FULLY REMOTE) = 0 ³ )
RK2 Controlling element opens (FULLY REMOTE) = 0 ³ )
RK3 Controlling element closes (FULLY REMOTE) = 0 ³ )
RK6 Value of «K6» in operating modes «SETPOINT
REMOTE» and «FULLY REMOTE» = 0
RY Degree of modulation for the analog output (FULLY
REMOTE) in % = 0
¹ ) Controller active
² ) No travel command (K2 + K3 = deenergized)
³ ) When the operating mode changes (e.g. LOCAL ® FULLY REMOTE), the relay
information and the degree of modulation will be predefined, depending on the
operating state of the plant.
Dtt Bus detection timer (value will also be maintained after a power failure)
The remote parameters are stored in RAM and will no longer be available after a power
failure.
After «Power-up», the default values will be used.
General
RAM parameter for re-
mote operation