Siemens SIPART PS2 Service Manual

Troubleshooting Procedures
3.16 Manual Mode
PS2 Troubleshooting Guide
Service Manual, 03/2017, A5E36661550-AA
31
3.16
Manual Mode
When bottom section of display shows: "MANxx" (xx = input signal), the unit is in Manual
mode. In Manual mode, the unit ignores setpoint command signal. It is possible to use the
and/or buttons to manually drive the actuator.
● To exit manual mode and allow control using a setpoint, press
button one time.
– Unit will display: "AUTxx" (xx = input signal), in the lower right-hand corner when in
Automatic mode.
3.17
Mechanical Blockage
While position deviation exists, determine which output pressure gauge is used to move
valve and eliminate current deviation.
● If the output pressure is equal to supply pressure, then:
– Issue is not the PS2, check for mechanical blockage that is preventing valve
movement. This could occur in the actuator and/or valve, refer to actuator/valve
service manual.
● If the output pressure is unable to reach full supply pressure, then:
– Issue is an air leak somewhere in the output; see Air Leak (Page 16).
● If output pressure is unable to exhaust, check exhaust port for blockage; otherwise,
replace piezo block.
● If PS2 is satisfied with current position deviation, the deadband could be too large; see
Dead Band Too Large (Page 23).
3.18
Parameter 1.YFCT
The two most common options for parameter 1 are WAY and TURN. "WAY" is for linear
actuators which will have feedback arm/linkage connecting the positioner to the actuator.
"TURN" is for rotary actuators which have a direct coupling connecting the positioner to the
actuator.
Firmware version 5.00.00 and newer will have a normal and inverted actuator type for all
Parameter 1 options. Inverted selections are identified with a minus sign. Normal and
inverted refers to the rotation of the PS2’s input shaft when the valve or damper closes.
Use Normal:
● Part-turn actuator closes when the positioner shaft or NCS rotates in the clockwise
direction.
● Linear actuator closes when the actuator spindle moves downwards and the positioner
shaft or NCS rotates in the anti-clockwise direction.

Siemens SIPART PS2 Specifications

General

Supply Pressure	1.4 to 7 bar (20 to 100 psi)
Enclosure Rating	IP66/NEMA 4X
Communication Protocols	HART, PROFIBUS PA, FOUNDATION Fieldbus
Output Pressure	0 to 100% of supply pressure
Hazardous Area Certification	ATEX, IECEx, FM, CSA
Type	Electropneumatic
Input Signal	4-20 mA
Rotation Angle	30° to 90°
Operating Temperature	-40°C to +80°C
Mounting	Linear and rotary actuators
Air Consumption	Typically less than 0.1 kg/h