Wilo IF-module LON, Инструкция по установке и эксплуатации, Страница: 62 / 84

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55 WILO SE 05/2011
Effective device control mode
network output SNVT_dev_c_mode nvoControlMode
This output network variable provides the current control mode of the pump.
Value range
Transmission
This value is automatically transmitted whenever a change is made.
Furthermore, this value is transmitted regularly if the nciSndHrtBt configuration
input was described with a valid clock.
Transmission frequency
The minimum network variable transmission interval can be set by describing
the nciMinOutTm configuration input with a valid clock.
Preset service type: acknowledged
Pump override stop command
network input SNVT_switch nviPumpOvdStop
This optional input network variable provides an overriding switch-on/switch-
off function and is intended for maintenance work, for example. The network
variable consists of a status byte and a value byte.
The “OVDSTOP” setting has priority over the setpoint set in nviPumpSetpoint
and the overriding setpoints set in nviOvdSpeed and nviOvdPress.
An overriding setting is indicated in the nvoPumpOverride output network variable.
Value range
Default value: status = 255, value = 255
Value Function
DCM_SPEED_CONST Constant speed mode
DCM_PRESS_CONST Differential pressure constant / pressure constant
DCM_PRESS_COMP Compensated pressure mode
DCM_PRESS_AUTO Temperature-dependent differential pressure
Status Value Function
0 0 – 255 NORMAL
1 0 NORMAL
1 1 – 255 OVDSTOP
255 0 – 255 Invalid (NORMAL)