Description of operating modes

General

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.

RAM parameter for re-

 

 

 

Remote

 

Default after

mote operation

parameter

 

«Power-up»

 

REM

Operating mode «LOCAL», «REMOTE SETPOINT» or

= 0

 

 

«FULLY REMOTE»

 

 

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

= 0 ¹)

 

 

«REMOTE SETPOINT» and «FULLY REMOTE»

 

 

RSTEP

Number of control cycles (opening / closing) (FULLY

= 0 ²)

 

 

REMOTE)

 

 

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

= 0

 

 

REMOTE» and «FULLY REMOTE»

 

 

RY

Degree of modulation for the analog output (FULLY

= 0

 

 

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.

12/14

Siemens Building Technologies

CC1A7865.1en

HVAC Products

31.10.2002

Page 12
Image 12
Siemens RS-485 manual Description of operating modes, «Fully Remote» Spr, Remote RK1