Basic Documentation

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Siemens Actuators SAX.., SAY.., SAV.., SAL.. for valves CE1P4040en
Smart Infrastructure Functions and control 2020-01-30
· If clogging/a blockade occurs during the self test, the test is failed, even if
the device clears it within 3 tries.
The actuator supports the following re-initialization / reset behaviour:
· Local reset by push-button
· Remote reset: Using “Remote-Reset” command.
Effect of reset:
· Process values except actual value and setpoint: set to ex-works default
values.
· Network parameters (register 513…516 and 764…768) are reset only in
case of local reset, not by remote reset (otherwise loss of communication).
· Not reset are: Counters, device info, and factory data.
Read value only, set to „Position control“ for valve actuators.
Electronic positioning limitation
Read value only, positioning time from one stop to another.
Depending on the valve type, this function can be used to compensate a
logarithmic characteristic, in order to achieve a linear input/output signal relation
(cf. “Parameter” table, page 65).
If the setpoint does not reach the tolerance limit set within this parameter, bit 4 is
set in register 769 “Status” and can be used for alarming in the building automation
system.
In case the communication to the controller is lost, the device can be configured to
go into a defined state.
· Waiting time to recognize communication loss à Register 515
· Reaction:
- Go to a predefined backup position à Register 514
- Deactivated (factory setting): “keep last setpoint”, i.e. in case of
communication loss, the device controls to the last received
setpoint, until a new valid setpoint is received.
In this parameter a setpoint can be defined, which the actuator moves to at first
commissioning or after a power reset, before receiving a new valid setpoint.
Configuring the RS-485 address and transmission parameters
Electronically switchable 120 W resistance for bus termination
If the parameters in registers 764…766 „Modbus configuration“ are changed via
bus, they are only saved if the function “Load” is called within 60 seconds in this
register. Otherwise, all changes are discarded.
Register 256
“Reset”
Register 259
“Operating mode”
Register 260 / 261
“Minimum and
maximum position”
Register 262
“Actuator runtime”
Register 263
“Positioning signal cha-
racteristic betw. Y and U”
Register 264
“Tolerance blockade
monitoring”
Register 513…515
“Backup mode”
Register 516
“Startup setpoint”
Register 764…766
“Modbus configuration”
Register 767
“Bus termination”
Register 768
“Bus config.
Command”