Siemens SITRANS PCS 7 Function Manual page 82

SITRANS F M MAG 6000
5.1 Mag6T
However, the following status changes are also performed automatically:
Number in graphic
(top)
1
2
Dosing screen form and Dosing start
Dosing can only start if the dosing screen form (input DOnMLi) as well as dosing (input DOnLi)
are activated. Dosing is not activated if the dosing screen form is not active, regardless of
whether or not input DOnLi is set to TRUE. Vice versa, while dosing is active it is not possible
to deactivate the dosing screen form by setting input DOnMLi to FALSE.
Resetting the dosing quantity
The dosing quantity (Tot2VF output) is reset automatically when a new dosing procedure is
started.
"Internal / external setpoint specification"
This block provides the standard "Internal / external setpoint specification" function that is
described in detail in the APL Online Help. The parameter names commence with the Mag6T
block with DSP (Dosing SetPoint) instead of SP (SetPoint) as in the APL.
"Forcing operating modes"
The "Forcing operating modes" function enables you to set the function block to a different
operating state via connectable input parameters regardless of the currently present control.
Inputs ForceDSrt, ForceDStp, ForceDPause and ForceDCont force the blocks into the
states "Start", "Stop" or "Pause".
The "Pause" state can only be forced if the block is in the "Start" state.
The "Start" state can only be forced while one of the following states are active:
● "Pause"
● "Stop"
A forced start of the dosing unit is not possible in "Off" state.
Block icon: The block icon indicates forced states by means of of a red F and a crossed-out
padlock.
Faceplate: An information text on the forced operating state is displayed in the standard view
of the faceplate, for example, "Forced stop". This is also indicated by a crossed-out padlock:
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Function
When the dosing quantity is reached, dosing terminates Tot2VF ≥ DSP).
If the Intlock (interlock) or Protect (protection) input is set to FALSE, or if a volume
flow alarm is triggered (see input parameter Feature bit 11), dosing changes to
the "Pause" state.
SITRANS Library for PCS 7
Function Manual, 05/2019, A5E35351976-11