9 782 . . DESIGO™ I/O-OPEN / UNIGYR™ PTE-SED2 SED2 Solution For integration of the Siemens SED2 variable speed drives Interface module for integration of the Siemens SED2 variable speed drives into a DESIGO V2.2 building automation and control system. The PTE-SED2 module can be used to integrate up to four variable speed drives. Note This document includes the engineering notes for the version DESIGO V2.2. For engineering notes for DESIGO V2.1 and UNIGYR see document CA2J9782en.
Functions General The interface module provides the following functions for each variable speed drive: • General control: on/off and setpoint definition (frequency, % PID or pressure) both with feedback • Variable speed drive data points: output frequency (Hz), output current (A), cumulative energy (kWh) and power (kW) • Errors: display and acknowledgement (for details refer to "Operating states"). System topology: DESIGO V2.
VSD data points The table shows the variable speed drive data points which can be integrated via the interface module: Data point name Value range Variable speed drive: OFF/ON Error acknowledgement VSD bus address 3) VSD frequency setpoint 4) VSD fixed PID setpoint in % VSD pressure setpoint in Pa PID feedback signal Output frequency Output current Energy Power Error code Error display: Normal/Error VSD running: OFF/ON VSD: AUTO/MANUAL 0/1 0/1 1 … 31 0 ...
If the chosen setpoint is a fixed PID percentage value, the compounds PuMdltSED, MotMdSED and FanMdSED are available. This enables a %-value from 0 to 100% to be set. The PID settings are carried out on the VSD itself. Finally, compounds PuPSED, MotPSED and FanPSED are available for the integration of a pressure-controlled variable speed drive. The pressure can be set in the range –200 to +200 Pa. The internal PID controller settings are carried out on the variable speed drive itself.
Access Access to this data is as follows: • Locally, on the variable speed drive itself • Centrally, via the PC user interface Applications The interface module comprises a combination of virtual I/O modules in sequence, which are addressed individually, starting from a base address. The variable speed drive data points are mapped internally in the interface module to normal I/O data points, which are then integrated into the automation stations.
Technical design General The interface module can be used to map data points from the SED2 variable speed drive to the P-bus, enabling the automation station to read all the data points via the assigned addresses and channels. The module reads the data points from the variable speed drives at regular intervals and updates the internal database with the actual values. When an automation station requests a reading, the data points are transferred from the interface module to the automation station.
Addressing For transmission over the P-bus, each data point is assigned an address. This "P-bus address" comprises: • Basic address • Offset address • Channel number Data point addressing The table below shows how the data points are addressed via the automation station. Slave address VSD 1 Variable speed drive No. Internal parameter Slave address VSD 2 Variable speed drive No. Internal parameter Slave address VSD 3 Variable speed drive No.
The two LEDs, "P-bus" and "RS485" indicate the operating state of the interface module. LED indicators on the interface module The table below shows the information associated with these LEDs. Phase Start-up phase (approx.
System safety and operational reliability Start-up response After switching on the power supply (reference voltage BEZ and system voltage G) and synchronization with a PXC… automation station, the interface module is ready within 0.5 seconds to start communication with the M-bus subscribers, i.e. to receive datagrams. Reliability of data transmission • Faulty data transmission identified, data not accepted. The CRC code guarantees the integrity of the data transmission.
Front view PTE-SED2 PTE.ASED.20 00250 1 2 I II A S B 1 - LED indicator for P-bus 2 - LED indicator for RS485/USS interface Engineering notes Document CM2Z8102 "Technical principles of I/O Module System" contains project engineering information relevant to the system and should be read before proceeding with the sections which follow. Special attention should be paid to the safety information.
Engineering with DESIGO V2.2 Library elements The CAS library contains the following compounds: • Pumps: PuFqSED, PuPSED, PuMdltSED Path: U\Charts\UEqp\Pu\ • Fans FanFqSED, FanPSED, FanMdSED Path: A\Charts\AEqp\Fan\ • Motor: MotFqSED, MotPSED, MotMdSED Path: U\Charts\UEqp\Mtr\ The compounds are stored one level down in the hierarchy in "envelopes" (xxxTpl), to allow the creation of instances in System Design.
Internal structure of an SED2 VSD compound Unlike the PTE-MBUS.60, the PTE-SED2 module does not require a "Setting" compound. The slave address is set directly in the relevant variable speed drive compound. The baud rate and other communications parameters are fixed, and cannot be modified. A standard AO is also used here for the slave address (SlvAddr). Standard AI blocks have been used, except for the cumulative values. These are addressed by means of (AIS) modules.
Compound interfaces The SED2 compound interfaces comply with the interfaces defined by CAS. Pump compounds: Motor compounds Fan compounds: The slave addresses must be entered retrospectively in the CFC, after synchronization of System Design and PX-Design. To do this, the variable speed drive address must be set at the "ValPgm" pin of the SlvAddr block (2nd page in CFC). The default value is 1.
Commissioning notes Setting VSD parameters for communication To enable the PTE-SED2 module to communicate with variable speed drives via the USS protocol, the following VSD parameters must be set as shown below. Refer to the procedure for modifying parameters, as described in the product documentation for the SED2 variable speed drive, e.g. in document CM1U5192.
The SED2 variable speed drives are connected to each other in parallel and linked to the PTE-SED2 module via terminals A, S and B.
Connection terminals on the SED2 The following schematic shows the designations of the VSD connection terminals. Designation of the SED2 terminals 16/18 Siemens Building Technologies Building Automation SED2 Solution – PTE-SED2 CA2N9782en 19.01.
Technical data Power supply Operating voltage Safety low voltage (SELV) in accordance with Module addresses Frequency 50 Hz / 60 Hz Power consumption 1.
Dimensions Dimensions in mm 94 94 2x32=64 5 EN50035-G32 EN50035-G32 EN50022-35x7,5 18/18 2004 Siemens Building Technologies Ltd. Siemens Building Technologies Building Automation SED2 Solution – PTE-SED2 7,5 EN50022-35x7,5 15 8106M01D 32 35 87 54 59,3 123,3 80 4,5 40 18 32 Subject to change CA2N9782en 19.01.
