OpenAir™ VAV Compact Controller Modbus RTU G..B181..MO VAV Compact Controllers 5 / 10 Nm with Modbus communication • • • • • A6V10631832_en--_f 2021-10-20 GDB181..MO with 5 Nm nominal torque GLB181..
Functions Function Description Communication Modbus RTU (RS-485), galvanically separated. Functions - Setpoint 0..100%, - Actual values for volume flow, position and differential pressure - Volume flow or position control - Override control Open / Close / Min / Max / Stop - Setpoint monitoring and backup mode Supported baudrates 9.6, 19.2, 38.4, 57.6, 78.4, 115.
Product documentation Title Topic Document ID VAV Compact Controllers Modbus RTU Detailed information about the VAV Compact Controllers with Modbus communication A6V10631862 Installation Instruction VAV Modbus / BACnet Mounting / installation instruction A6V10523083 How to obtain documentation and product-related software Related documents such as environmental declarations, CE declarations, etc., can be downloaded at the following Internet address: http://siemens.
Push-button addressing Display current address (digits in reverse order) The Modbus address can be set without a separate tool by using the push-button and LED. To display the current address, press button <1s. Colors 1-digits: red 10-digits: green 100-digits: orange Example for address 124: LED Note The address is entered and shown in reverse order. Set new address (digits in reverse order) 1. Enter addressing mode: press button > 1s until LED shines red, then release button (before LED gets dark). 2.
Commissioning and parameterization Parameterization of the VAV application The OEM generally provides the basic configuration to VAV Compact Controllers, especially the parameter Vn and the opening direction. The setting of all other parameters depends on the actual application and can be obtained from the ventilation planner or similar. The following parameters must be checked or set prior to commissioning: Parameter Range Description Factory setting Operating mode VAV (flow ctrl.
Engineering and commissioning Engineering Engineering mainly consists of implementing the data model into a VAV application, especially sending the setpoint from the supervisory controller to the VAV compact controller and receiving the actual values (cf. Modbus register list) for control and monitoring. System limitations of Modbus RTU apply, especially number of devices per segment and cable lengths depending on the baud rate.
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. Mounting Mounting positions IP54 protection in following mounting positions Accessory mounting holes 1) Cf. mounting instr. A6V10523083 1) Not to be used for fixation of the actuator, use anti-rotation-bracket instead.
Modbus registers For a detailed description of specific functions please refer to the product documentation A6V10631862. Reg. Name R/W Unit Scaling Range / enumeration Process Values 1 Setpoint RW % 0.01 0..100 2 Override control RW -- -- 0 = Off / 1 = Open / 2 = Close 3 = Stop / 4 = GoToMin / 5 = GoToMax 3 Actual position R % 0.01 0..100 4 Actual Flow [rel.] R % 0.01 0..120 1 0..60000 / 0..16667 l/s 0.1 0..500 3 5 Actual Flow [abs.
Register 769 “Status” Status Bit 00 1 = Local override Bit 06 1 = Adaptation run done Bit 01 1 = Backup mode active Bit 07 1 = Adaptation run in progress Bit 02 1 = Sensor comm. fault Bit 08 1 = Reserved Bit 03 1 = Sensor tubes crossed Bit 09 1 = Reserved Bit 04 1 = Device jammed Bit 10 1 = Selftest passed Bit 05 1 = Nom.
Technical data Power supply Operating voltage G..B181.. AC 24 V ± 20 % (SELV) or AC 24 V class 2 (US) Frequency Power consumption 50/60 Hz at 50 Hz Actuator holds 1 VA / 0.5 W Actuator rotates 3 VA / 2.5 W Function data Positioning time for nominal rotation angle G..B181.. Nominal torque GDB.. 5 Nm GLB.. 10 Nm GDB.. < 7 Nm GLB..
Degree of protection Environmental conditions Applicable standard Operation Transport Storage IEC 60721-3-x Climatic conditions Class 3K5 Mounting location Indoors Temperature general 0…50 °C Humidity (non condensing) 5…95 % r. F. Climatic conditions Class 2K3 Temperature -25…70 °C Humidity 5...95 % r. h. Climatic conditions Class 1K3 Temperature -5…45 °C Humidity 5...95 % r. h.
Dimensions / Weight Square shaft Min. drive shaft length Max. shaft hardness 6...12.8 mm 30 mm <300 HV Air volume flow controller Type 3-position controller with hysteresis Vmax, adjustable resolution 1% / factory setting 100% 20%...120% Vmin, adjustable resolution 1% / factory setting 0% -20%...100% Vn = f(dpn), adjustable resolution 0.01 / factory setting 1.00 1.0…3.
Dimensions G..B181.1E.. 20 71 ø7 4.15 180 87 137 158 41.3 min. 100 61 5 min. 6 43 14 x 12 26.5 8 2 3547M01 9.6 min. 200 Ø 3...8 X= min. 80 X 8 - 16 mm 12.
Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a 6300 Zug Switzerland Tel. +41 58-724 24 24 www.siemens.com/buildingtechnologies Document ID A6V10631832_en--_f Issue 2021-10-20 © Siemens Switzerland Ltd, 2015 Technical specifications and availability subject to change without notice.
