ACVATIX™ Electro-hydraulic actuators for valves Modbus communication profiles SKB62/MO SKC62/MO SKD62/MO Stellantriebe SK..
Use This document describes the network functions of the actuator series SK..62../MO. Functions Function Description Communication Modbus RTU (RS-485), not galvanically isolated Number of nodes Max. 32 Functions ● Setpoint 0...100 % valve setting ● Actual value 0...100 % for valve setting ● Override control Open / Close / Min / Max / Stop ● Setpoint monitoring and backup mode Supported baud rates 9.6 / 19.2 / 38.4 / 57.6 / 78.4 / 115.
Notes Safety CAUTION National safety regulations Failure to comply with national safety regulations may result in personal injury and property damage. ● Observe national provisions and comply with the appropriate safety regulations. Commissioning The devices were developed specifically for use with Climatix pushbutton configuration as described in document CE1A3975 1). The bus configuration can alternatively be configured by the local HMI, see section User interface [➙ 4].
User interface Pushbutton operation Action Pushbutton operation Feedback message Current Modbus address Button press <1 s ● 1st digit (single digit): red ● 10-digit (double digit): green ● 100-digit (triple digit): orange (starting from lowest address position) The LED blinks 1 x blue after the address indication if bus termination is switched on Example: 124 = 4 x red, 2 x green, 1 x orange Switch on/off bus termination Switch-on Press the button 3 times Blinking or flashing of LED stops (te
LED colors and blinking patterns Color Blinking pattern Description Green 1 s on / 5 s off Normal mode without bus traffic Flickering Normal mode with bus traffic Orange / green 1 s orange / 1 s green Device is in override control mode Orange 1 s on / 1 s off Bus parameter not yet configured 1 s on / 5 s off Device is in backup mode (replacement mode) Permanently lit Mechanical error, device blocked, manual intervention or calibration 1 s on / 5 s off Internal error 0.
Enter new address (starting from lowest address position) 1. Enable addressing mode: Press button > 1 s LED is red – Release pushbutton (before LED turns off). 2. Enter digits: Press button n-times. LED flashes 1 x for each press of the button as feedback 1st digit: red / 2nd digit: green / 3rd digit: orange 3. Save digits: Hold pushbutton LED lights in the color of the following digits – Release button 4.
Set address "50": 1. Enable addressing mode 2. Skip 1-digit: Hold pushbutton LED is lit green – Release button 3. Set 10-digits: Press button 5 x. LED flashes green for each press of the button 4. Saved address (skip 100-digit): Hold pushbutton LED is red – Release button The address is saved and is repeated 1 x for confirmation Set address "5": 1. Enable addressing mode 2. Set 1-digit: Press button 5 x. LED flashes red for each press of the button 3.
Parameter 513 Backup mode (replacement mode) RW 0 = Go to backup position / 1 = Not available / 2 = Deactivated 2 = Deactivated 514 Backup position RW 0...100 % = 0...10000 0% 515 Backup timeout RW 0...65535 900 [s] 516 Start-up setpoint RW 0...100 % = 0...10000 0% 764 Modbus address RW 1...
Function description Register 1/3 "Setpoint/actual value" The controller setoint for the position to move to, 0...100% stroke/angle of rotation, scaling 0.01, i.e. 0% = 0 and 100% = 10000. The actual value reported by the device, with the same scaling. Register 2 "Override control" The actuator can be operated in override control for commissioning / maintenance purposes or systemwide functions (e.g. night cooling).
Register 262 "Actuator runtime" Read value only; positioning time from one stop to another. Register 263 "Positioning signal characteristic between Y and U" Depending on the valve type, a logarithmic characteristic can be compensated using this function, in order to achieve a linear input/output signal (see Modbus registers [➙ 7]).
Connection diagrams Device diagram/Connecting cable The actuators come with a prewired connecting cable. All devices connected to it must be connected to the same neutral line G0.
Dimensions External Modbus converter Masse in mm X [mm] [kg] 250 0,15 Revision numbers Type Valid from rev. no. SKB62/MO S55195-A127 ..H SKC62/MO S55195-A128 ..H SKD62/MO S55195-A129 ..I Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug Tel. +41 58 724 2424 www.siemens.
