Siemens SIPART DR22 Manual page 125

Manual
Functional explanation of the digital message signals
RB No computer standby of the controller
This signal indicates that the controller is in internal operation, i.e. not in
computer standby. In cascade controllers (double controllers) this signal relates
to the master controller, in override controls to the main controller.
RC No computer operation
This signal indicates the negated computer operation RC = Int∧CB and
controls the setpoint switching or the DDC operation. In cascade controllers this
message relates to the master controller, in override controls to the main
controller.
H Manual mode
The controller is in manual mode, triggered either by manual/automatic
switching on the front of the controller (Hi) or by the binary signal He if the
control signals Si,
are Low.
N Follow-up mode
The controller is in follow-up mode when the control signals Si,
(in manual over follow-up operation priority) are Low.
A1/A2 Alarm 1 and 2 indicate response of the limit value alarms A1 and A2.
A3/A4 Alarm 3 and 4 indicates response of the limit value alarms A3 and A4.
MUF Transmitter fault
The analog input signals of the controller can be monitored for exceeding of the
range. This signal gives a group alarm if an error is detected.
IntI Internal operation of the slave controller
This signal indicates that the cascade in cascade controllers (double
controllers) is disconnected to Internal by Internal/External switching of the
follow-up controller.
Position increments for the Δy-adjustment in S-controllers
Δy
Message signals RBII, RCII, HII, NII, IntII, ΔyII are only active at S1=12 and have the same
meanings for controller II as above.
FE9 to FE12 The analog signals are converted by comparators into digital signals (> 50 % ≙1)
SIPART DR22 6DR2210
C79000-G7476-C154-03
1.5 Functional description of the structure switches
1.5.8 Digital output signal processing (S76 to S93 and S258 to S266)
yBL and N (with follow-up over manual operation priority)

1 Technical Description
yBL and H

123