Siemens 6DR55 Series, Manual

Page: 144 / 178

Functions/operation via PROFIBUS PA
142
SIPART PS2 PA Manual
A5E00127926--05
The checkback is displayed bit--coded in 3 bytes:
Bit Meaning for ”1” Notes
0 0 Device in failsafe position Position determined by parameter 46 (FSTY)
1 Request for local operation Reports that a key has been pressed
2 Device is operated locally Device locally parameterized (e.g. 1 YFCT) or is not
initialized
3 Emergency operation active Device is in manual mode (display : Man or P)
4 Deviation of the motion direction Not required for the positioner
5 Stop reached (valve not completely open) Not required for the positioner
6 Stop reached (valve not completely closed) Not required for the positioner
7 Operating timeout Device cannot be adjusted (monitoring time and mo-
nitoring threshold exceeded, parameters 43 TIM and
44 LIM) due to lack of compressed air.
1 0 Valve is opened Setting command ”Supply air to actuator” sent
1 Valve is closed Setting command ”Exhaust air from actuator” sent
2 Parameters have been changed Set a short time after quitting ”Configuration mode”, if
one or more parameters have been changed
3 Simulation operation 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
4 Is not preset in Profile 3
5 Fault in the contrl Not required for the positioner
6 Control inactive Not required for the positioner
7 Self test active Not required for the positioner
2 0 Path integral exceededn Will be set if the limit value set for travel integral is
exceeded.
1 Additional input active Binary input 1 is activated
2 Additional input active Binary input 2 is activated
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.
Checkback
Remote cascade
input
Remote cascade
output