Description Of Operating Modes; Ram Parameter For Remote Operation - Siemens RS-485 User Manual

Description of operating modes

General
RAM parameter for re-
mote operation
12/14
Siemens Building Technologies
HVAC Products
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
REM Operating mode «LOCAL», «REMOTE SETPOINT» or
«FULLY REMOTE»
SPR Setpoint remote
RHYS1 Switch-on threshold remote
RHYS2 Lower switch-off threshold remote
RHYS3 Upper switch-off treshold remote
ROFF Controller ON (0) / OFF (1) in operating modes
«REMOTE SETPOINT» and «FULLY REMOTE»
RSTEP Number of control cycles (opening / closing) (FULLY
REMOTE)
RK1 Release of burner (FULLY REMOTE)
RK2 Controlling element opens (FULLY REMOTE)
RK3 Controlling element closes (FULLY REMOTE)
RK6 Value of «K6» in operating modes «SETPOINT
REMOTE» and «FULLY REMOTE»
RY Degree of modulation for the analog output (FULLY
REMOTE) in %
)
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.
Default after
«Power-up»
= 0
= SP1
= Hys1
= Hys2
= Hys3
)
= 0 ¹
)
= 0 ²
)
= 0 ³
)
= 0 ³
)
= 0 ³
= 0
= 0
CC1A7865.1en
31.10.2002