Functional Explanation Of The Digital Control Signals - Siemens SIPART DR22 Manual

Manual

1.5.3.4 Functional explanation of the digital control signals

bLb Blocking operation
Blocking the entire device operation and configuring.
Exception: Display of circuit
bLS Blocking structuring
With this signal the controller only allows switching to the online
parameterization levels outside process operation. In this way the parameters
for adapting the instrument to the process and the necessary settings for the
adaptation can be selected. Structuring is blocked.
bLPS Blocking parameterization and structuring
The entire configuring of the device is blocked, this means the parameterization
as well. Only the normal process operation according to the preselected
controller type is permitted.
CB Computer standby
Depending on the controller type this digital signal together with the
Internal/External key effects either switching in the setpoint range or DDC
operation begins. Central computer fail line in SPC and DDC operation.
He Manual external
This signal blocks the output of the controller and enables direct manual
adjustment of the manipulated variable on the front control panel.
N Follow-up
With this signal the output of the K--controller and the three-position step
controller with external position feedback is followed up to the follow-up signal
y .
N
Si Safety operation
In K-controllers and three-position step controllers with external position
feedback, the manipulated variable adopts the parameterized safety value. In
three-position step controllers with internal position simulation, the manipulated
variable runs defined to 0 or 100 %.
tSHI/II Setpoint ramp/Setpoint changes
Setpoint changes via the setpoint ramp can be stopped by a binary input.
w I/II External setpoint -- preselection
SL
Preselect whether external setpoint via analog input or SES/incremental.
PI P-operation controller I
With this signal the controller I (parameter set I) is switched to P-operation.
PII P-operation controller II
With this signal the controller II (parameter set II) is switched to P-operation.
PAU Parameter switching
The programmable controller types include single controllers and double
controllers (meshed controllers). Single controllers operate with the parameter
set I and can be switched by this digital signal to the parameter set II. Double
controllers are permanently assigned to the parameter sets I and II; the
switching possibility is then omitted.
SIPART DR22 6DR2210
C79000-G7476-C154-03
1 Technical Description
1.5 Functional description of the structure switches
1.5.3 Digital input signal processing
39