Tracer Summit Interface to Square D Drives June 2000 BAS-PRC004-EN
Introduction The Square D Company is a supplier of electrical distribution, industrial control, and automation products, systems, and services. Tracer Summit building management system connects to the Modbus RTU port of Square D Altivar 58 (ATV58) and Altivar 66 (ATV66) adjustable speed drive controllers using a BACnet /Modbus RTU bridge. The Tracer Summit operator workstation and building control unit (BCU) can monitor and control the present value of Square D unit controller data. The following are trademarks or registered trademarks of their respective companies: ARCNET from Datapoint Corporation; BACnet from ASHRAE; Modbus from Modicon; Phoenix Contact from Phoenix Contact; Square D and Altivar from Square D Company; Tracer Summit from Trane; and Wago from Wago Corporation. American Standard Inc. 2000 BAS-PRC004-EN
Application Square D unit controllers connect to a Sierra Monitor 8051 communications bridge via EIA-485. Up to 32 drives can be daisy-chained on a single EIA-485 link to the bridge. The Sierra Monitor bridge can be connected to a Trane Tracer Summit BACnet Ethernet or ARCNET network. A Sierra Monitor Modbus RTU/BACnet bridge maps Modbus RTU data registers from the Altivar controllers into BACnet objects. A Tracer Summit workstation or BCU can monitor and control Square D points by reading the status of the BACnet objects in the bridge. When a Tracer Summit workstation comes online, it polls the Sierra Monitor bridge and dynamically adds BACnet analog input, binary input, analog output, and binary output objects to the Tracer Summit workstation database. These points can be added to graphics, used in schedules and reports, or included in custom programming language (CPL) routines just like other Tracer Summit input/output objects. The points can be monitored and controlled (on/off), but they cannot be edited, such as changing an object name or engineering units. BAS-PRC004-EN 3
Altivar 58 and Altivar 66 adjustable speed drives Altivar 58 drive The Altivar 58 has two methods of connecting to a Modbus RTU/EIA-485 network. If the drive does not have a keypad, the Altivar 58 keypad port (a 9-pin SUB-D connector) can be used to link the Altivar 58 to an EIA-485 network. The keypad port has a fixed communication rate of 19,200 baud, no parity, eight data bits, and one stop and one start bit. Set the Altivar 58 network address through the drive keypad by modifying the value of parameter Add in Menu 4. For more information, see the instruction bulletin (VVDED397047US) supplied with the keypad. Use the sample network wiring diagram shown below to complete the wire connections (Figure 1). For more detail, see the Square D instruction bulletin (VVDED397057US) that can be obtained from the technical library at www.squared.com. If the keypad is occupying the port, the Altivar 58 can be connected to an EIA-485 network using the Modbus/ JBUS option card (Square D part number VW3A58303U). This option card supports 4,800; 9,600; and 19,200 baud communications and all parity options. These parameters are modified via the keypad in Menu 8. The network address is set by switches on the option card. The Sierra Monitor gateway should be wired to the Altivar 58 using DB9 connectors as shown in Figure 1. Wiring interfaces must be ordered separately from another source, such as Phoenix Contact or Wago. Contact your local Square D distributor to get the necessary interface hardware. Note: Recommended connectors include the following: Phoenix Contact Subcon Plus 9/M-SH 2761509 for the final drive in the chain Phoenix Contact Subcon Plus M2 2761839 for all other drives in the chain Figure 1: Sierra Monitor gateway to Altivar 58 drives sample network wiring diagram 4 BAS-PRC004-EN
Altivar 66 drive The Altivar 66 has a Modbus RTU Personal Computer Memory Card International Association (PCMCIA) interface that allows it to communicate to the Sierra Monitor 8051 gateway using EIA-485. The Square D part number for this interface is VW3A66031U. This PCMCIA interface plugs into a Communication Carrier Module (Square D part number VW3A66205) or one of the I/O Extension Modules [Square D part number VW3A66201T (24 Vdc) or VW3A66202T (115 Vac)] on the Altivar 66 drive. The Sierra Monitor gateway should be wired to the Altivar 66 using DB15 wiring interfaces as shown in Figure 2. Wiring interfaces must be ordered separately from another source, such as Phoenix Contact or Wago. Contact your local Square D distributor to get the necessary interface hardware. Note: Recommended connectors include the following: Phoenix Contact DFLK-D15 Panel Mount Wiring Interface (part number 2280307) Phoenix Contact FLKM-D15 Wiring Interface (part number 2281199) Wago 810-289/020 Wiring Interface (part number 810-289/020) Figure 2: Sierra Monitor gateway to Altivar 66 drives sample network wiring diagram with Modbus RTU and EIA-485 electrical interface BAS-PRC004-EN 5
Modbus control registers for the ATV58 are listed in Table 1. Table 1: ATV58 Modbus control registers Modbus control registers for the ATV66 are listed in Table 2. Table 2: ATV66 Modbus control registers Word Description Word Description W451 W452 W453 W454 W455 Frequency reference Output frequency RPM Motor current Line voltage W459 Drive status word 1 W460 Drive status word 2 W461 Drive status word 3 W463 Past fault 1 W464 Past fault 1 status W465 Past fault 2 W466 Past fault 2 status W467 Past fault 3 W468 Past fault 3 status W469 Past fault 4 W470 Past fault 4 status W471 Past fault 5 W472 Past fault 5 status W473 Past fault 6 W474 Past fault 6 status W475 Past fault 7 W476 Past fault 7 status These registers have been adjusted for reference in Modscan and Sierra Monitor configuration files. Note that Square D documentation does not reflect this correction and shows register numbers as one less than shown. W2022 W2042 W2043 W2055 Frequency reference Output frequency Motor current Line voltage W2041 Drive status word 1 W2048 Drive status word 2 W2049 Drive status word 3 W2143 Past fault 1 W2142 Past fault 1 status W2145 Past fault 2 W2144 Past fault 2 status W2147 Past fault 3 W2146 Past fault 3 status W2149 Past fault 4 W2148 Past fault 4 status W2151 Past fault 5 W2150 Past fault 5 status W2153 Past fault 6 W2152 Past fault 6 status W2155 Past fault 7 W2154 Past fault 7 status These registers have been adjusted for reference in Modscan and Sierra Monitor configuration files. Note that Square D documentation does not reflect this correction and shows register numbers as one less than shown. 6 BAS-PRC004-EN
Additional information Functionality System functions enable status and control, alarm management, scheduling, and trending. Status and control Trane Tracer Summit PC Workstation and Tracer Summit BCU application programs can monitor and control the present value of BACnet objects in the Sierra Monitor bridge. These objects reference the state of Modbus holding registers on Square D Altivar drives. Square D data may be added to Tracer Summit graphics, trends, reports, and more. Alarm management A CPL routine is required to include Square D input points in Tracer Summit alarm management applications. Determine the alarm condition based on local saved values that represent out-of-range conditions. Scheduling Schedule Square D points directly from the Tracer Summit scheduling application. Trending Square D data may be included in Tracer Summit reports and trend logs. Special considerations When setting up a Square D drive interface, keep in mind these special considerations regarding the hardware points, station addressing, scaling, and alarm management. Hardwired points If any hardwired points are connected to the Altivar 66, the I/O Extension module must be used. The I/O Extension module supports a Modbus Communication Carrier module. If no points are hardwired, the Communication Card Kit may be used. (See "Supported devices" for part numbers.) Station addressing Each Modbus RTU device connected to the Sierra Monitor bridge requires a unique station address. The Sierra Monitor bridge is also assigned a BACnet device ID, which must be different than any Modbus station address. Scaling Modbus RTU sends the present value as an unsigned integer. Edit the appropriate scaling factors for each point when mapping Modbus registers to BACnet objects in the Sierra Monitor gateway. (No special scaling is required in Tracer Summit systems.) Alarm management CPL routines are required to include Square D unit controller alarms in Tracer Summit alarm management. Refer to Commissioning Tracer Summit BACnet projects engineering bulletin (BAS-PRB002-EN) for more details. Packed bit Square D uses a single Modbus register (two bytes equals sixteen bits) to represent up to sixteen different binary or fault conditions. The Sierra Monitor gateway is capable of extracting each bit independently and exposing its value to the Tracer Summit system in the form of a BACnet binary input or output. Supported devices The Altivar 58 and Altivar 66 adjustable speed drive controllers are supported. Altivar 58 The interface can be set up via ATV58 keypad port on the drive or via Modbus/ JBUS option card VW3A58303U. Altivar 66 The interface can be set up via EIA-485 with Communication Carrier Module (VW3A66205), Modbus Communication Card Kit (VW3A66301U), and DB15 connector. Other resources Square D Company 1415 South Roselle Road Palatine, IL 60067 847-397-2600 www.squared.com BAS-PRC004-EN 7
The Trane Company An American Standard Company www.trane.com For more information contact your local district office or e-mail us at comfort@trane.com Literature Order Number File Number Supersedes Stocking Location BAS-PRC004-EN PL-ES-BAS-000-PRC004-6-00 New La Crosse Since The Trane Company has a policy of continuous product improvement, it reserves the right to change design and specifications without notice.