Siemens 6DR55 Series Manual page 144

Functions/operation via PROFIBUS PA
Checkback
Bit Meaning for "1"
0 0 Device in failsafe position
1 Request for local operation
2 Device is operated locally
3 Emergency operation active
4 Deviation of the motion direction
5 Stop reached (valve not completely open)
6 Stop reached (valve not completely closed)
7 Operating timeout
1 0 Valve is opened
1 Valve is closed
2 Parameters have been changed
3 Simulation operation
4 Is not preset in Profile 3
5 Fault in the contrl
6 Control inactive
7 Self test active
2 0 Path integral exceededn
1 Additional input active
2 Additional input active
Remote cascade
input
Remote cascade
output
142
The checkback is displayed bit--coded in 3 bytes:
In remote cascade mode (actual mode = remote cascade), the remote
cascade input is used as the setpoint. Remote cascade input consists
of a floating-point value (4 bytes) and status (1 bytes).
This output provides the current setpoint in AUTO mode and remote
cascade. The status is used especially for the transition from AUTO to
remote cascade.
In conjunction with the parameter input variable (primary value scale)
you cannot only set the setpoints to the positioner as a percentage of
the valve position but also in physical quantities such as cubic meters
per day or liters per minute. It is also possible to adapt the readbacks
to this scaling.
Notes
Position determined by parameter 46 (FSTY)
Reports that a key has been pressed
Device locally parameterized (e.g. 1 YFCT) or is not
initialized
Device is in manual mode (display : Man or P)
Not required for the positioner
Not required for the positioner
Not required for the positioner
Device cannot be adjusted (monitoring time and mo-
nitoring threshold exceeded, parameters 43 TIM and
44 LIM) due to lack of compressed air.
Setting command "Supply air to actuator" sent
Setting command "Exhaust air from actuator" sent
Set a short time after quitting "Configuration mode", if
one or more parameters have been changed
Simulation mode has been approved. Master class 2
can overwrite actual data values, e.g. for purposes of
testing the response at the limits of the control
system
Not required for the positioner
Not required for the positioner
Not required for the positioner
Will be set if the limit value set for travel integral is
exceeded.
Binary input 1 is activated
Binary input 2 is activated
SIPART PS2 PA Manual
A5E00127926--05