User Manual

Logical I/O blocks
General functions
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Prio Use
11 Prio 1…5 n/a
Prio 6 The minimum switch-off time [TiOffMin] has expired. Priority 6 is released.
[PrVal] Since neither priority 6 nor any entries for priorities (1…5) are active, the output [PrVal] is now again
determined by the effective switch command from priorities (7…16).
The output value [PrVal] remains at
Off .
Switch types [SwiKind]
Blocks: BO, MO, BVAL, MVAL
All switching I/O blocks have a configurable switching response. The switching response determines the
functioning of the block. The switching functions are subject to the priority mechanism in the [PrioArr] and
the switch command delay.
●
Normal : Direct switching in stages taking into account runtimes (e.g., motors, burners, dampers, etc.).
●
Motor : Switching in stages for rotating aggregates taking into account ramp-up and ramp-down times
(fan-belt protection).
●
Trigger : Event-driven switching, last command takes precedence ; integration of a data point (EIB,
LONMARK)
●
Switch : Generation of an ON/OFF pulse of a defined duration.
●
Push button with delay : Generation of an ON/OFF pulse of a defined duration. The pulse can be
extended whenever required.
●
Release (Release Command) : Issuance of a subsystem-specific release value instead of Present_Value
(=Relinquish_Default), if no priority is active in the output object.
[SwiKind] BO MO BVal MVal
Normal
• • • •
Motor
•
Trigger
• •
Switch
• •
Pushbutton with delay
• •
Release
•
Normal
Normal handling of the process values in the [PrioArr]. The configured runtimes are active. The outputs can
be switched directly or in stages.
Motor
The
Motor setting is used when there is a need to allow for ramp-up and ramp-down times due to a
rotating centrifugal mass. The programmed times in this setting can be used, e.g., to avoid overloading the
fan belt when starting a fan motor.
When the motor is switched down, the system checks on the basis of the ramp-up time whether or not the
current motor speed has been reached. The switch-down command is not executed until the motor speed
is stable. During the ramp-down period, the effective command to the hardware is
Off . When the ramp-
down time has elapsed, the new command is transmitted to the hardware.