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Siemens
Actuators SAX.., SAY.., SAV.., SAL.. for valves
CE1P4040en
Building Technologies
Functions and control
2018-12-05
4.13.4 Manual adjustment
The actuator’s internal stroke position measurement is inactive during manual
adjustment.
The position feedback changes to 0% once the manual adjuster is pressed and
remains on the value during manual adjustment. The actuator detects manual
action based on the deviation between the setpoint and the stroke position and
after 10 seconds reports in register 769 with the warning “Mechanical error, device
blocked, manual intervention or calibration”. The actuator LED blinks green, the
cable adapter LED is red.
Upon return to automatic mode, the actuator synchronizes to stroke position 0%.
After the synchronization, the actuator follows the pending setpoint, the actuator
LED changes to continuous green and the cable adapter LED blinks green
(communication active). The warning in register 769 is reset.
4.13.5 Parameters and function description
Reg.
Name
R/W
Unit
Scaling
Range / listing
Process values
1
Setpoint
RW
%
0.01
0…100
2
Forced control
RW
--
--
0 = Off / 1 = Extend / 2 = Retract
3 = Stop
3
Actual value
R
%
0.01
0…100
256
Command
RW
--
0 = Ready or calibration in progress /
1 = Not available / 2 = Self test
3 = Reinitialize / 4 = Remote reset
Parameters
259
Op mode
R
--
--
1 = POS
260
MinPosition
R
%
0.01
0…100
261
MaxPosition
R
%
0.01
0…100
262
Actuator runtime
R
s
1
30
263
Positioning signal
characteristic
between Y and U
R
--
--
0 = Linear (e.g. SAX61../MO + V_G41)
1 = Logarithmic (e.g. SAS61../MO + V_G44)
264
Tolerance blockade
monitoring
R
%
0.01
4
513
Backup mode
RW
--
--
0 = Move to backup position
1 = Maintain last position / 2 = Disable
514
Backup position
RW
%
0.01
0…100
515
Backup timeout
RW
s
1
60...900
516
Startup setpoint
RW
%
0.01
0…100
764
Modbus address
RW
--
--
1…248 / 255 = “unassigned”
765
Baud rate
RW
--
--
0 = auto / 1 = 9600 / 2 = 19200 3 = 38400
4 = 57600 / 5 = 76800 / 6 = 115200
766
Transmission
format
RW
--
--
0 = 1-8-E-1 / 1 = 1-8-O-1 / 2 = 1-8-N-1 / 3 = 1-8-N-2
767
Bus termination
RW
--
--
0 = Off / 1 = On
120
Ω
electronically switchable
768
Bus config.
command
RW
--
--
0 = Ready / 1 = Load / 2 = Reject
769
Status
R
--
--
See Section, Register 769 “Status”